https://www.carbonless.org/about daily 0.75 2026-10-22 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/1351dec3-29b7-4b2a-b76c-750c1fc0dfe4/carbonless-logo.png https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/29782af5-d934-4714-b6d3-7c67ec32508b/cb-the-difference-calcuator.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/a0a55b00-5200-4092-b21f-db1a8913f3d8/IMG_0745.JPG https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/b9504ea4-aea0-4ca6-a2e3-61a8e1e317d0/bookcover2.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/1351dec3-29b7-4b2a-b76c-750c1fc0dfe4/carbonless-logo.png https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/1784908697909-V5KCNLDQOW6704JEIYVK/image-asset.jpeg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/1d379c48-b415-4abe-9788-e8e71ae0adaa/carbonless-houses.png https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/e5be9eca-5de2-462f-8735-7a76adbe58ca/PHT32.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/4a8c272f-522d-4946-b1e3-05e38d5b638e/mediamodifier_image.png https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/1784920677739-FKTWDYDX4FRME499GBRD/image-asset.jpeg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/1784923485803-X321UPYNK9GN3FRMO9S7/image-asset.jpeg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/0a54c4d2-cb4f-45d6-8846-127e1314757f/Screen+Shot+2023-10-21+at+7.37.13+AM.png https://www.carbonless.org/contact daily 0.75 2026-03-08 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/1351dec3-29b7-4b2a-b76c-750c1fc0dfe4/carbonless-logo.png https://www.carbonless.org/links daily 0.75 2025-12-07 https://www.carbonless.org/wall-assemblies-reference-library daily 0.75 2026-10-30 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/a8820a61-0daf-40e7-83d8-0fdc2bd92dd6/Carbonless_Library_Page_Layout_2026+%281%29.png https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/9b756679-c617-402e-ab59-6b096894c159/WALLASSEMBLY-SAMPLE-1-2026-2x4-Carbonless-Logic-Wall-Assembly-big.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/b04afac5-5552-4dd2-8183-ac38d5dd151b/WALL-ASSEMBLY-SAMPLE-3-6-inch-Metal-Studs-Carbonless-Logic-Wall-Assembly-big.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/a548da21-7c5b-4c5e-ada6-475f41e3156c/WALL-ASSEMBLY-SAMPLE-2-2026-2x6-Carbonless-Logic-Wall-Assembly-big.jpg https://www.carbonless.org/building-envelope-course daily 0.75 2026-10-22 https://www.carbonless.org/sustainability daily 0.75 2026-10-22 https://www.carbonless.org/super-energy-efficient-healthy-home-field-guide daily 0.75 2026-10-25 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/e6e4011f-2798-469c-a8d9-3c1178daeb64/field-guide-front-cover.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/eaf9d936-8f58-4128-8a0c-44df6c5c4824/CBFG-Excel-Screenshot-2.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/3a94a84c-9e47-4714-9f22-ba200a6e340f/CBFG-Excel-Screenshot-1.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/2ec185b3-9164-48da-9238-0b0c57d84ce1/CBFG-Excel-Screenshot-3.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/92e05a23-2b37-42c9-8649-dd92b7c96623/WALLASSEMBLY-SAMPLE-1-2026%2B2x4%2BCarbonless%2BLogic%2BWall%2BAssembly.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/6a132cf8-6b18-499f-bddb-d2429acb94e5/justin-visten-group-stick-one-test.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/9e6218a7-cb6a-4f2e-99ba-9e249f47ef33/WALL-ASSEMBLY-SAMPLE-2-2026%2B2x6%2BCarbonless%2BLogic%2BWall%2BAssembly.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/03715d1c-0e49-441b-b83d-95d4cb495f45/calculator_card.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/15e36053-aa4e-44d0-b40e-63344cf83826/roof-lung-cutaway.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/0f7e21b8-e795-4217-8321-35878d9fc7f8/roof-lung-ir-outside-shingles-141.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/fa380a4b-917e-49ef-9b1d-019258219263/roof-lung-ir-underside-sheathing-93-99.jpg https://www.carbonless.org/membership-terms daily 0.75 2026-04-12 https://www.carbonless.org/sponsorship daily 0.75 2026-10-22 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/e7124929-3e77-4704-b47c-c6df07e84336/brian-iverson.jpg https://www.carbonless.org/directory daily 0.75 2026-10-22 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/99b51432-d060-46f5-8954-be764fd19248/drainstrip.webp https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/1d6cc2f8-5238-40ab-8aed-979a4a19505e/nate-consulting-photo.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/5c130771-404e-45e5-b2c8-c3e0dfe319ce/visten.webp https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/0e175fc7-ac19-4285-85b1-4e8ac271e35c/burleigh-builders.png https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/51f362d4-6a3e-4e23-b211-7b73357ea38a/Kaevin-logo.png https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/6f2797cb-751f-426d-bf2e-e1badf44377a/Nexxus-Companies-Logo-White-on-Black-2024-v1.png https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/edae5a13-9330-4ee8-8658-c837097ff833/ct-stavely-logo1.png https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/997265a2-ce90-4e0a-9298-707e93f54dc9/182-0-0-0-10000-10000-180.png https://www.carbonless.org/membership daily 0.75 2026-10-24 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/1351dec3-29b7-4b2a-b76c-750c1fc0dfe4/carbonless-logo.png https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/1783522349417-SV25EUJ3SUPLUY4S4RDO/image-asset.jpeg https://www.carbonless.org/cbm-building-envelope-course daily 0.75 2026-10-22 https://www.carbonless.org/cbm-building-envelope-materials daily 0.75 2026-06-15 https://www.carbonless.org/carbonless-difference-calculator daily 0.75 2026-10-24 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/daa29e48-a09e-41c9-bd52-694620312169/difference-calculator-sample.jpg https://www.carbonless.org/privacy-policy daily 0.75 2026-07-13 https://www.carbonless.org/terms-conditions daily 0.75 2026-07-13 https://www.carbonless.org/shop-policy daily 0.75 2026-07-13 https://www.carbonless.org/retrofit-remodel-field-guide daily 0.75 2026-10-22 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/2e5c516c-0f65-465a-bac3-5e02c3b8c4e5/nightmare-front-cover-beevland.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/eaf9d936-8f58-4128-8a0c-44df6c5c4824/CBFG-Excel-Screenshot-2.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/3a94a84c-9e47-4714-9f22-ba200a6e340f/CBFG-Excel-Screenshot-1.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/2ec185b3-9164-48da-9238-0b0c57d84ce1/CBFG-Excel-Screenshot-3.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/02203234-4b8f-4376-999e-c5a23a9c6524/michigan-four-foot-icicles.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/e5ad8cff-c635-4c7f-8501-4795f4e29886/ga-sip-roof-2-stains.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/c2bdda43-5f95-4cab-8814-0860d35b5ecd/michigan-hot-roof-spray-foam.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/ea593cb6-8626-402c-b649-4df9763098e7/michigan-snow-melt-holes.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/9eddbff6-817d-4020-b1dc-05d16e0eecaa/thermal-break-strips-1.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/7b9f84fd-08b8-4525-9a81-47679cf8d879/thermal-break-strips-2.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/912fee84-f2a5-4bbb-b0f9-56dc7614f8d3/michigan-frost-before-roof-lung.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/324a7bb4-ef46-4ebf-b604-77c28a867065/michigan-frost-after-roof-lung.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/59b2611b-fe12-44f9-860d-8d74fcc1af87/ga-sip-roof-1-ceiling.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/54ea8285-70ae-4907-b599-4a18b066cafb/ga-sip-roof-3-corner.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/9db4a77f-714c-4091-9df6-e84544d3a316/ga-sip-roof-4-vent.jpg https://www.carbonless.org/carbonless-2126 daily 0.75 2026-10-22 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/084df29d-ef55-4183-9b14-f8cd91da699d/Highlight_2_The_Recipe.png https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/7a68a1b5-18ff-4535-be20-8ba73b778df5/beaver-dam.jfif https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/630f6cd9-87d6-4733-8320-6ab69909a0c2/the-cake.webp https://www.carbonless.org/consulting daily 0.75 2026-10-25 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/58590d59-cf4c-494d-99ca-09f0b6f7d252/Brianpic.webp https://www.carbonless.org/hammerdahl daily 0.75 2026-10-24 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/5f78c0ad-fc34-4ba4-8364-28f409a30852/hammerdahl-cover.jpg https://www.carbonless.org/fix-or-remodel-a-home daily 0.75 2026-10-25 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/1e1861d2-a6b7-4931-b2f7-bc4407ef7f65/fix-remodel-job-0.jpg Fix or Remodel a Home / Building Open a roof and this is what you find. Rotted sheathing, cut out and replaced. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/8ff34f52-6457-4b9d-ad09-8148a71bfc76/fix-icicles.webp Fix or Remodel a Home / Building Icicles mean heat is leaking out the roof. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/6930861b-ea95-48c7-b77a-9c43ee5008b5/fix-window-rot.webp Fix or Remodel a Home / Building Siding off under a window. The wood rotted away. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/afd3287c-cc32-450f-a52f-f9a415dd26e6/fix-behind-cabinets.webp Fix or Remodel a Home / Building Behind the kitchen cabinets. Water lines, wiring and mold. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/01edbb50-36fd-4b3f-abe3-fbcea8b81bc7/fix-wall-opened.webp Fix or Remodel a Home / Building Open the wall and you find pipes, wires and mold. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/96b55eae-6534-4a7c-911e-dc3ce6187256/interior-tb-1.webp Fix or Remodel a Home / Building An old outside wall opened from the inside, with new framing and foam going in. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/ee1b1ede-8861-4609-9510-7b20cee527d7/fix-window-rot.webp Fix or Remodel a Home / Building Open the wall and the window is ready to fall out. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/813710a8-125c-450c-a011-b7da5d8e434a/barenaked-tstud.webp Fix or Remodel a Home / Building The BareNaked Tstud® I invented to put a thermal break through the wall. That is how I figured out what effective R value really means. This house won the U.S. Department of Energy's 2020 award for the most energy-efficient house in America, and the thermal break through the wall was part of why. It is a net zero house. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/fcfbd94d-0e9b-498a-ae5e-791b6ef461f2/interior-tb-2.webp Fix or Remodel a Home / Building New framing with foam built in front of the old wall, next to a window. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/997b3d1d-411b-4369-8675-26f871f50402/fix-sip-failure.webp Fix or Remodel a Home / Building A SIP panel failure on a very expensive log home. Beadboard foam. It became saturated. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/2686616f-34cf-4297-abbe-65695744a63f/prototype-panel.webp Fix or Remodel a Home / Building A prototype wall panel I built. Closed-cell foam, with room left for the electrician. People ask me how I did it. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/8a986600-7689-425b-9f99-32a20b442766/thermal-camera-window.jpg Fix or Remodel a Home / Building A $30 thermal camera shows where the cold gets in. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/2e992bce-3541-4366-96a4-f1a048db2425/fix-remodel-job-6.jpg Fix or Remodel a Home / Building A real retrofit. Mineral wool goes on the outside of the old wall. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/da60ebe8-9054-42b0-80b5-1957321f941e/thermal-wall-wrong.webp Fix or Remodel a Home / Building Build your wall wrong and this is what it looks like. The stripes are the studs. The dots are the fasteners. That is heat going right through the wall. That camera and its software cost $15,000. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/121c452d-23d8-481f-8169-4d01e25ffad8/fix-remodel-job-7.jpg Fix or Remodel a Home / Building Wrapped in mineral wool, new window in, ready for the siding. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/afda49f2-e3de-4c85-a09a-ffc532c39d5f/thermal-bottom-plate.webp Fix or Remodel a Home / Building The purple and blue at the bottom of this wall is cold coming in. There is no thermal break through the bottom plate. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/5dfbcb59-e2d3-4f36-a39e-c3f33a0c1328/drainstrip-wall.webp Fix or Remodel a Home / Building This wall has a 99% thermal break through it. DrainStrip™ goes on the outside to hold an air gap behind the siding, so water can drain and the wall can dry. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/e9ac1e26-9469-4087-a12c-d5df362ed667/attic-top-plate-old-insulation.jpg Fix or Remodel a Home / Building Pull the ceiling down and look up. Old blown-in insulation sitting on the top plate, with a flex duct run right through it. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/0b1073f6-3466-4d33-afc5-1a9936682c6b/south-wall-r45.webp Fix or Remodel a Home / Building The south wall of my own house. The average R value through this wall is 45. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/540e032f-ff50-432d-9eb5-590fe908e91d/roof-deck-mold-1.jpg Fix or Remodel a Home / Building When somebody put new siding on this house, they did not extend the boot for the dryer vent. The dryer blew all its warm, moist air into the attic. This is what it did to the roof deck. The dark spots are mold. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/a8116d7c-19ad-479d-864b-5399b0a92a1c/metal-stud-ci.webp Fix or Remodel a Home / Building Metal studs with continuous rigid insulation. There are 11 to 13 ways to insulate a wall in North America, and about 18 more in Europe. Each one has its own number. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/8ec577b9-7ad2-4ed6-bd33-02fd6acb54c7/roof-deck-mold-2.jpg Fix or Remodel a Home / Building Same roof, next bay over. One dryer vent that nobody hooked back up after the siding job, and the mold runs all the way down to the vent chute. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/daac100c-15c6-4852-852d-05c17bb8501b/twinbeam.webp Fix or Remodel a Home / Building The TwinBeam™. This is how I built my 21-foot-tall wall. It stops the stud from bending side to side or front to back, so the only way it can fail is by crushing straight down its length. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/c1c3d18b-4022-45e7-8c1d-1b55b7d87f62/drain-vent-wiring-open-wall.jpg Fix or Remodel a Home / Building Open the wall and you see what the next owner never will: drains, vents, water lines and wiring. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/a6ed48ba-4704-480e-aeb9-b79b95dc3ac8/THE_BOX_cover.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/1306bfde-8a8d-4c07-bec7-f66875270e1c/Retrofit-Remodel-V2a.png https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/2e5c516c-0f65-465a-bac3-5e02c3b8c4e5/nightmare-front-cover-beevland.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/c54970a5-735e-48c5-9a9c-66b98a06d1b1/wall-code.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/0f8155be-f4e8-41ef-9233-d150952ca2e3/wall-brian.jpg https://www.carbonless.org/donate daily 0.75 2026-10-26 https://www.carbonless.org/the-box daily 0.75 2026-10-30 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/9a601452-2ca3-4f1c-9093-3a443329751d/THE_BOX_square_2026.jpg https://www.carbonless.org/thermal-break-inside-your-home daily 0.75 2026-10-30 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/1306bfde-8a8d-4c07-bec7-f66875270e1c/Retrofit-Remodel-V2a.png https://www.carbonless.org/carbonless-audiobook-ebook daily 0.75 2026-10-30 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/f1863c74-f287-4309-b55c-be7f5b8c9734/carbonless+audiobook+cover.jpg https://www.carbonless.org/roofs daily 0.75 2026-10-28 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/c2bdda43-5f95-4cab-8814-0860d35b5ecd/michigan-hot-roof-spray-foam.jpg Hot Roofs Gone Wrong and the Carbonless Roof Lung System The hot roof. Closed cell foam on the bottom side of the roof deck. The framing still leaks heat. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/15e36053-aa4e-44d0-b40e-63344cf83826/roof-lung-cutaway.jpg Hot Roofs Gone Wrong and the Carbonless Roof Lung System The cutaway: roof deck, the air gap held open by DrainStrip, then a new nail base and underlayment on top. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/ea593cb6-8626-402c-b649-4df9763098e7/michigan-snow-melt-holes.jpg Hot Roofs Gone Wrong and the Carbonless Roof Lung System Snow melting from underneath. Heat getting out of the house. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/59b2611b-fe12-44f9-860d-8d74fcc1af87/ga-sip-roof-1-ceiling.jpg Hot Roofs Gone Wrong and the Carbonless Roof Lung System Built in 1988. From the floor, that wood ceiling looks perfect. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/0f7e21b8-e795-4217-8321-35878d9fc7f8/roof-lung-ir-outside-shingles-141.jpg Hot Roofs Gone Wrong and the Carbonless Roof Lung System Outside: the ZIP wall in the sun reads 109.1 degrees. The shingles read 141.0 degrees. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/02203234-4b8f-4376-999e-c5a23a9c6524/michigan-four-foot-icicles.jpg Hot Roofs Gone Wrong and the Carbonless Roof Lung System Four-foot icicles over the windows, every winter. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/e5ad8cff-c635-4c7f-8501-4795f4e29886/ga-sip-roof-2-stains.jpg Hot Roofs Gone Wrong and the Carbonless Roof Lung System Then you look up close. Dark water stains on the ceiling boards. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/fa380a4b-917e-49ef-9b1d-019258219263/roof-lung-ir-underside-sheathing-93-99.jpg Hot Roofs Gone Wrong and the Carbonless Roof Lung System Inside, under the Roof Lung: the bottom of the sheathing reads 93.1 and 98.7 degrees. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/912fee84-f2a5-4bbb-b0f9-56dc7614f8d3/michigan-frost-before-roof-lung.jpg Hot Roofs Gone Wrong and the Carbonless Roof Lung System Before the Roof Lung. You can see every truss in the frost. That is heat getting out of the house. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/54ea8285-70ae-4907-b599-4a18b066cafb/ga-sip-roof-3-corner.jpg Hot Roofs Gone Wrong and the Carbonless Roof Lung System Mold at the corner where the wall meets the wood ceiling. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/324a7bb4-ef46-4ebf-b604-77c28a867065/michigan-frost-after-roof-lung.jpg Hot Roofs Gone Wrong and the Carbonless Roof Lung System After the Roof Lung. You can't see the trusses anymore. The heat stays in the house where it belongs. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/9db4a77f-714c-4091-9df6-e84544d3a316/ga-sip-roof-4-vent.jpg Hot Roofs Gone Wrong and the Carbonless Roof Lung System The vent tells another story. 55-degree air meets 70% humidity, hits the dew point, and water forms right on the vent. https://www.carbonless.org/learn-and-teach daily 0.75 2026-10-28 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/492c5724-a8ca-40e8-b694-6ac3f9ea50ac/THE_BOX_square_2026.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/58572d3c-a5f6-4b14-b5f6-87419540744f/thermal-break-cover.webp https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/81454ab7-7e29-4e7e-9e53-dc3961da6e03/calculator_card.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/e6e4011f-2798-469c-a8d9-3c1178daeb64/field-guide-front-cover.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/2e5c516c-0f65-465a-bac3-5e02c3b8c4e5/nightmare-front-cover-beevland.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/1306bfde-8a8d-4c07-bec7-f66875270e1c/Retrofit-Remodel-V2a.png https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/9e6218a7-cb6a-4f2e-99ba-9e249f47ef33/WALL-ASSEMBLY-SAMPLE-2-2026%2B2x6%2BCarbonless%2BLogic%2BWall%2BAssembly.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/f1863c74-f287-4309-b55c-be7f5b8c9734/carbonless+audiobook+cover.jpg https://www.carbonless.org/build-a-new-home daily 0.75 2026-10-28 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/2828a59f-61a9-47f0-ab86-2f56c912a82e/hvac-trusses-pipes-trunk.jpg Build a Better Home or Building Plumbing and the main heating and cooling trunk run side by side through the floor trusses. Everything stays inside the house. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/ca746cb3-aa94-43e5-9cc1-9e23b181564d/wall-assembly-sample-2x4.webp Build a Better Home or Building Sample page from the Library: a 2x4 wall, 16 inches on center. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/cf78590c-2077-45a2-82cb-75c28bd7e733/hvac-supply-trunk-trusses.jpg Build a Better Home or Building The supply trunk runs right between the trusses, inside the part of the house you heat and cool. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/cf592c92-b1ff-4c1a-95d2-b5805ad69abf/wall-assembly-sample-2x6.webp Build a Better Home or Building Sample page from the Library: a 2x6 wall, 16 inches on center. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/12902e7e-3bed-44f4-8a0d-160a3e10cae4/hvac-round-duct-trusses.jpg Build a Better Home or Building Round duct comes off the main trunk and goes through the open web of the trusses. No cutting, no notching. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/71f79960-66b4-4fce-baf3-ea9e507a7a0c/wall-assembly-sample-metal-studs.webp Build a Better Home or Building Sample page from the Library: a 6-inch metal stud wall. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/01dc8f21-95b9-49eb-a4db-c2a2c09a0da8/hvac-duct-wiring-floor.jpg Build a Better Home or Building Ductwork, wiring and water lines all share the floor system. None of it goes up in the attic. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/1ca3298d-e7e7-49df-bc7a-f64929bcfd6e/plumbing-floor-system.jpg Build a Better Home or Building Drains drop through the floor system before the walls are ever closed. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/54be27c0-1180-40f3-aaa4-9bc60a8e2014/air-handler-inside.jpg Build a Better Home or Building The furnace and air handler sit inside the house too. Equipment inside never has to fight the attic heat or cold. https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/f4732943-bc7c-499a-a49e-e7dc423c2527/hvac-branch-runs-trusses.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/f8687655-607a-4f5a-8212-8dcf15d18e6f/THE_BOX_SQUARE_WEBSITE_IMAGE.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/8e2cc91c-c07d-44b5-b8f1-9ef7331ff6e4/fresh-air-unit-inside.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/e6e4011f-2798-469c-a8d9-3c1178daeb64/field-guide-front-cover.jpg https://www.carbonless.org/home-1-1 daily 1.0 2026-10-28 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/15e36053-aa4e-44d0-b40e-63344cf83826/roof-lung-cutaway.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/0f7e21b8-e795-4217-8321-35878d9fc7f8/roof-lung-ir-outside-shingles-141.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/fa380a4b-917e-49ef-9b1d-019258219263/roof-lung-ir-underside-sheathing-93-99.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/c2bdda43-5f95-4cab-8814-0860d35b5ecd/michigan-hot-roof-spray-foam.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/ea593cb6-8626-402c-b649-4df9763098e7/michigan-snow-melt-holes.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/02203234-4b8f-4376-999e-c5a23a9c6524/michigan-four-foot-icicles.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/912fee84-f2a5-4bbb-b0f9-56dc7614f8d3/michigan-frost-before-roof-lung.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/324a7bb4-ef46-4ebf-b604-77c28a867065/michigan-frost-after-roof-lung.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/6a132cf8-6b18-499f-bddb-d2429acb94e5/justin-visten-group-stick-one-test.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/e6e4011f-2798-469c-a8d9-3c1178daeb64/field-guide-front-cover.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/2e5c516c-0f65-465a-bac3-5e02c3b8c4e5/nightmare-front-cover-beevland.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/a6ed48ba-4704-480e-aeb9-b79b95dc3ac8/THE_BOX_cover.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/266974bc-9ce5-4ab5-b9b4-3d08a05fadf1/calculator_card.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/1306bfde-8a8d-4c07-bec7-f66875270e1c/Retrofit-Remodel-V2a.png https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/7edd2b8e-e617-4cf9-946b-29ee4c4066f6/beev-books.webp https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/59b2611b-fe12-44f9-860d-8d74fcc1af87/ga-sip-roof-1-ceiling.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/e5ad8cff-c635-4c7f-8501-4795f4e29886/ga-sip-roof-2-stains.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/54ea8285-70ae-4907-b599-4a18b066cafb/ga-sip-roof-3-corner.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/9db4a77f-714c-4091-9df6-e84544d3a316/ga-sip-roof-4-vent.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/9ea3b9a1-ad77-4dc4-9985-c25ca1fc4067/book+mockup.png https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/29ad97c1-792a-48a5-96d0-292034926d56/5+stars https://www.carbonless.org/books daily 0.75 2026-10-29 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/f1863c74-f287-4309-b55c-be7f5b8c9734/carbonless+audiobook+cover.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/9a601452-2ca3-4f1c-9093-3a443329751d/THE_BOX_square_2026.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/03715d1c-0e49-441b-b83d-95d4cb495f45/calculator_card.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/e6e4011f-2798-469c-a8d9-3c1178daeb64/field-guide-front-cover.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/2e5c516c-0f65-465a-bac3-5e02c3b8c4e5/nightmare-front-cover-beevland.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/1306bfde-8a8d-4c07-bec7-f66875270e1c/Retrofit-Remodel-V2a.png https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/5f78c0ad-fc34-4ba4-8364-28f409a30852/hammerdahl-cover.jpg https://www.carbonless.org/member-profile daily 0.75 2026-10-29 https://www.carbonless.org/store daily 0.75 2026-02-13 https://www.carbonless.org/store/bundle monthly 0.5 2025-12-01 https://www.carbonless.org/store/consulting monthly 0.5 2026-10-06 https://www.carbonless.org/store/p/carbonless-wall-assembly-library-2x4-2x6-walls monthly 0.5 2026-10-30 https://www.carbonless.org/store/p/carbonless-audio-ebook monthly 0.5 2026-10-28 https://www.carbonless.org/store/p/retrofit-remodel-field-guide monthly 0.5 2026-10-30 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/2e5c516c-0f65-465a-bac3-5e02c3b8c4e5/nightmare-front-cover-beevland.jpg Store - THE RETROFIT & REMODEL FIELD GUIDE — THE NIGHTMARE | Digital Edition — Instant Download/ebook - nightmare-front-cover-beevland.jpg https://www.carbonless.org/store/p/the-carbonless-standard-field-guide monthly 0.5 2026-10-30 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/e6e4011f-2798-469c-a8d9-3c1178daeb64/field-guide-front-cover.jpg Store - The Super Energy-Efficient & Healthy Home Field Guide — Digital Edition - field-guide-front-cover.jpg https://www.carbonless.org/store/p/the-difference-calculator monthly 0.5 2026-10-31 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/03715d1c-0e49-441b-b83d-95d4cb495f45/calculator_card.jpg Store - THE DIFFERENCE Calculator — Free - calculator_card.jpg https://www.carbonless.org/store/p/dmp7srzsz6cxmia4bkujof52niu38e monthly 0.5 2026-10-30 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/1cd2628e-e83a-4694-9eab-3fd768dba1af/Retrofit-Remodel-V2a.png Store - How to Make a Thermal Break on the Inside of Your Home — Retrofit & Remodeling Guide, Expanded Edition - Retrofit-Remodel-V2a.png https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/9eddbff6-817d-4020-b1dc-05d16e0eecaa/thermal-break-strips-1.jpg Store - How to Make a Thermal Break on the Inside of Your Home — Retrofit & Remodeling Guide, Expanded Edition - thermal-break-strips-1.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/7b9f84fd-08b8-4525-9a81-47679cf8d879/thermal-break-strips-2.jpg Store - How to Make a Thermal Break on the Inside of Your Home — Retrofit & Remodeling Guide, Expanded Edition - thermal-break-strips-2.jpg https://www.carbonless.org/store/p/at1lqy7u5zc17yy10jbmv0ejt8m7xl monthly 0.5 2026-10-28 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/f1863c74-f287-4309-b55c-be7f5b8c9734/carbonless+audiobook+cover.jpg Store - Carbonless Audiobook + Ebook - carbonless audiobook cover.jpg https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/983ff540-257c-4bdf-afc9-eee6d10c4b28/dy7474p-front-shortedge-384.jpg https://www.carbonless.org/store/p/playbook-and-checklist monthly 0.5 2026-10-30 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/9b68a2a1-322a-4185-996c-d4032935a95e/THE_BOX_cover.jpg Store - THE BOX — Complete Edition, Playbook + Checklist | Instant Download - THE_BOX_cover.jpg https://www.carbonless.org/store/p/1-hr-consulting-fee-gagxj monthly 0.5 2026-10-25 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/e7124929-3e77-4704-b47c-c6df07e84336/brian-iverson.jpg Store - Consulting with Brian Iverson — 2 HOURS - Brian Iverson, founder of Carbonless https://www.carbonless.org/store/p/1-hr-consulting-fee-gagxj-jda9j monthly 0.5 2026-10-30 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/e7124929-3e77-4704-b47c-c6df07e84336/brian-iverson.jpg Store - Consulting with Brian Iverson — 4 HOURS - Brian Iverson, founder of Carbonless https://www.carbonless.org/store/p/1-hr-consulting-fee-gagxj-jda9j-khblp monthly 0.5 2026-10-25 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/e7124929-3e77-4704-b47c-c6df07e84336/brian-iverson.jpg Store - Consulting with Brian Iverson — 30 MINUTES - Brian Iverson, founder of Carbonless https://www.carbonless.org/store/p/1-hr-consulting-fee-gagxj-jda9j-khblp-tpp8j monthly 0.5 2026-10-25 https://images.squarespace-cdn.com/content/v1/64b48ea6bccc06664e533fa5/e7124929-3e77-4704-b47c-c6df07e84336/brian-iverson.jpg Store - Consulting with Brian Iverson — 1 HOUR - Brian Iverson, founder of Carbonless