How to Make a Thermal Break on the Inside of Your Home - The Carbonless Builder® Retrofit & Remodeling Guide Expanded Edition

Your utility bill is not going back down.

In the last five years the price of residential electricity in America climbed about 21 percent. In 2025 it rose faster than inflation — faster than groceries, faster than gas, faster than medicine. One in six households is already behind on their energy bills. Hundreds of utilities have rate increases approved or pending through 2027. Nobody is forecasting relief.

Now run that forward thirty years.

The house you own — or the one your kids hope to own someday — is going to cost more to heat and cool every year for the rest of its life. Not because of how you live in it. Because of how it was built. A building built to code is built to the floor — the legal minimum — and then the family inside it pays the difference between the floor and what the building should have been, every single month, forever.

That is the math nobody wants to look at. A whole generation priced out of affording the buildings they already live in. Kids who cannot afford the land to build on because the utility bill on the house eats the down payment.

Here is the part nobody is telling you: you can break that curve from the inside.

You do not have to tear the house apart. You do not have to rebuild the exterior. A thermal break on the inside of your existing walls can cut what that building costs to operate — permanently, for the rest of its life. This eBook is the only place that method is written down in plain language.

That is why this exists. Not to add a book to a shelf. To put the way out in the hands of the people who need it, before the thirty-year bill comes due.

[Source note for Rob, not for the page: the 21% / faster-than-inflation / 1-in-6 figures are verified from EIA and Center for American Progress data, May 2026. Safe to publish. Do NOT add a specific dollar forecast for 30 years out — state the trajectory, not a made-up number.]

Here is what almost nobody understands about an existing wall.

At just a half-inch of interior strip depth — the thinnest application there is — a typical wall gets a continuous thermal break from the inside. Even with one of the most affordable fills there is, blown-in cellulose, that half inch lifts the whole-wall effectiveness by more than 25 percent over the bare existing wall.

A half inch. The most affordable fill. Over 25 percent better.

Now imagine what the best assemblies in this eBook do at two inches — over 138 percent more efficient than the wall you have today. Picture that number dropping into a Manual J load calculation: a smaller heating and cooling load, smaller equipment, a lower utility bill every month for the life of the building.

Most people have never heard of a Manual J. That is exactly the problem. This eBook shows you the number, what it means, and how to use it — for every common wall assembly, at every strip thickness, with the verified math behind it.

Product Description

In the last ten days alone I took twenty consulting calls. This eBook answers almost all twenty.

Over the years I have taken somewhere between one and two thousand of those calls. Different buildings, different climates, different families — but the same problems came up again and again. This eBook is that common core: the diagnoses and the answers most callers needed, written down once so you do not have to pay for the call to get them. It is not every consult I have ever done — no eBook could be, and a truly one-of-a-kind building will still need a set of eyes on it. But the part almost everyone needs is here, and for most buildings it is enough.

Fifty-one years of field work produced this. Twenty-five thousand homes walked. Two thousand real estate closings. Every principle came from a building that failed, every rule from a consequence, every number measured or calculated in a real assembly in a real building lived in by a real family.

Lessons learned. Now lessons taught.

What This Is

Nobody teaches how to make a thermal break from the inside of an existing building. It is not in the code. It is not verified by inspectors. It is not specified by most architects. And in many existing buildings it is the only thermal break available — because you cannot tear the exterior apart to add it from the outside.

This eBook is the only place that methodology — the strip method, the full installation sequence, the climate-zone guidance, the dew-point framework, and the verified assembly tables — is written out in plain language for anyone who lives in, works in, owns, manages, or builds a structure.

What's Inside

Thirty chapters across 279 pages. The diagnostic framework for reading any building. How heat, air, and moisture actually move. Why mold appears and what it is really telling you. The interior thermal break strip method, step by step. The ceiling assembly that takes an attic from R-25 to R-70. Closed cell spray foam done right. Windows, vapor, ventilation, and stopping moisture at the source. What your 2×4 and 2×6 walls actually perform at, with the numbers. Manual J. And the complete retrofit business blueprint for the contractor who wants to build a premium service around verified performance.

A full performance-path appendix — every common cavity insulation type, 2×4 and 2×6, with verified R-value, U-factor, and percentage improvement at every strip thickness, plus the hot roof panel assembly.

This Is Also a Business Plan

The contractor who reads this completely has everything needed to build a retrofit service that delivers measurable, documented, verifiable improvement — the diagnostic as a paid service, the scope of work, the pricing, the client communication, and the documentation that turns a retrofit into a marketable asset for the owner.

A Global Fix

The physics is the same in every language. The assembly tables include metric values for Canada and translate across climate zones worldwide. The thermal bridge conducts heat at the same rate in Minnesota and Manitoba and Munich.

Who It's For

The homeowner who found mold at midnight. The woman who has been right about her house for three years and nobody listened. The remodeling contractor who wants a premium business. The architect who wants assemblies that perform. The property manager whose portfolio bleeds energy. Anyone paying a utility bill they should not have to pay.

Delivered as a downloadable eBook (PDF). Read it at midnight, act on it in the morning.

The Heartfelt WHY

I have been consulting my life away. Every day the phone rings. Every day somebody needs an answer. And every day that knowledge helped one family, solved one problem, and then the next call came.

I want to take my grandkids fishing rather than repeating the same thing in every consulting call. That is not to say I don’t enjoy helping people directly... I have knowledge that does not exist anywhere else in the form I carry it — not in any university program, not in any code book, not in any manufacturer's guide. If I do not write it down, it goes with me, and the families who need it do not get it. That is not acceptable to me.

So I wrote it all out. Because the family paying $400 a month in a house built to code deserves to know why. Because the woman who has been right about her house for three years deserves to understand what she has been smelling and feeling. Because our kids and grandkids cannot afford the land to build on if they spend everything they earn on utility bills in buildings that were built to the floor and called done.

Build it better. Afford to live in it. Leave it better than you found it. That is the whole thing.