Carbonless Builder Wall Assembly Reference Library

700+ Verified Wall Assemblies. One-Time Purchase. Lifetime Access. Ongoing Updates.

The Carbonless Builder Wall Assembly Reference Library is a licensed, professional-grade technical resource built for builders, designers, energy consultants, building science pros, and serious high-performance practitioners.

This library delivers the complete Carbonless Builder Wall Assembly Master Index—more than 700 wall assemblies with side-by-side performance data, consistent calculation methodology, and fully transparent assumptions. Everything is designed for apples-to-apples comparisons so you can evaluate real thermal performance without guesswork or marketing spin.

It compares insulation from 60 different manufacturers against each other, analyzes percentage of wall cavity vs. percentage of wall framing, evaluates continuous insulation options like R5 vs. R6, R9, R10, R12, R15, R20 (and more), and contrasts rigid vs. semi-rigid insulation across framing types including 2x4, 2x6, 2x8, uninsulated Tstud, 5.5" Tstud, and metal studs—for a total of over 700 unique performance path method computations providing average R-values, U-values, metric U-values, and RSI values.

Library Contents Include:

• 700+ complete wall assembly references

• Parallel-path and whole-wall R-value calculations

• U-factors and RSI values

• Detailed layer-by-layer assembly breakdowns

• Fixed reference wall assemblies for direct comparisons

• Climate-specific performance insights

• Material reference tables (air films, lumber at R-1.25/inch, OSB, plywood, claddings, cavity insulation options, continuous insulation systems including rigid, semi-rigid, and integrated products like ZIP-R)

• Sample assemblies and full calculation methodology

• Disclaimers and usage guidance

• Video walkthrough explaining how to read, compare, and apply the assemblies

Each assembly download includes 8+ distinct calculations, giving you complete transparency into thermal performance, parallel-path impacts, and whole-wall outcomes.

Sample Assemblies (Examples from the Library):

• 2x4 Wall Assembly with R-13 Fiberglass Batt

• 5.5" Un-Insulated Tstud with Huber R-6 ZIP and Blown-In Fiberglass

Key Focus: Performance Path Compliance (Not Prescriptive) All assemblies and calculations in this library are based on the performance path—focusing on whole-wall/system-level energy performance, trade-offs, and modeling outcomes (e.g., equivalent or better than baseline prescriptive requirements via flexible component choices). This approach supports real-world compliance and optimization under high-performance standards, including:

• Passive House principles (airtightness, thermal bridging elimination, ventilation heat recovery, ultra-low heating/cooling loads).

• LEED approaches (energy optimization, indoor environmental quality, materials transparency, water efficiency).

• CSA Step Code logic (progressive energy performance tiers, airtight envelopes, moisture-safe design, step-based compliance in Canadian climates).

• Broader performance-based pathways (e.g., energy modeling for Net Zero readiness, whole-building trade-offs for cost-effective efficiency).

This is not a prescriptive path resource (fixed minimums per component without flexibility)—it's built for physics-first evaluation and informed decision-making.

Your one-time purchase also includes these free bonuses (normally $99+ value):

• Carbonless Builder Core Envelope System High-Performance Roadmap + Super-Efficient Execution Checklist Digital eBook Bundle (~105 pages total) — Your comprehensive guide to carbon-conscious, high-performance building principles and methodology (included free—$99 value). Covers the deep "why" and step-by-step execution for new builds, retrofits, and remodeling, with physics-based priorities that outperform code minimums.

• Bonus: Thermal Suite Deconstruction Full breakdown of how the 50% BTU reduction was achieved in my own home, why each layer works together, exact products/systems used (as one real-world example), and how the same logic scales to 90%+ reduction in any climate. Living proof it works—not theory, not simulations. This provides you the reader with the exact R Values and U Values of how I built to a 50% reduction of BTU’s and provides you with the metrics, physics, and the recipe, but allows you to then choose your ingredients. You do not have to use the ones I invented. It's not a sales job, it’s a physics first approach to helping you know what to do. And when.

• Bonus: Carbonless Builder Retrofit & Remodeling Guide — First Edition(~100-page eBook) — Tailored for the real houses most people actually live in. Includes two powerful case studies:

• A home crippled by severe mold—and physics-first fixes to prevent it forever.

• A 3,000 sq ft house burning $800/month in utilities—and targeted envelope upgrades that transformed it into something comfortable and affordable. Phased, practical strategies that respect existing structures, budgets, and climates.

• Free eBook Bonus: Carbonless – An Introduction to Sustainable Building My original intro book. Included free as your foundation: thermal living basics, early concepts behind innovations like Thermal Studs, and why physics always beats hype. Perfect starter if you're new—use it to build confidence before applying the library to your projects.

Access Options:

• Personal Access: Licensed for one individual user ($299 one-time).

• Corporate Access: Licensed to one company, up to 10 users under a single shared login ($2,000 one-time).

Both include downloadable, watermarked PDFs and free lifetime updates as new assemblies, materials, and system types are added (including SIPs, TSUPS, ICF, and emerging options).

For firms, organizations, or institutions needing access for more than 10 users, contact hello@carbonless.org to discuss expanded licensing and managed access.

Important Notes:

• This library is an educational and comparative reference only. It is not a code compliance document, engineering report, or installation guide. All values are steady-state and provided for informational purposes.

• Users are responsible for verifying calculations, confirming local code requirements, and consulting qualified professionals as needed.

• The library is licensed, non-transferable, and subject to revocation for misuse. Unauthorized sharing or reproduction is prohibited. Full license terms appear at checkout.

Questions, corrections, feedback, or custom needs? Reach out anytime at hello@carbonless.org. This resource is actively maintained and refined for accuracy and real-world utility.

© 2026 Brian Iverson / Carbonless, Inc. All rights reserved. Licensed use only. Unauthorized reproduction or distribution prohibited.

Purchase securely through carbonless.org. Instant licensed access upon completion.