The Domus Salus
Knowledge Library

Building science research, material evaluations, guides, and references — everything you need to understand healthy home construction and demand better.

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Building Science Education

Evidence-based deep dives into modern construction's health impacts and the Salus Standard alternatives. New articles appear here automatically.

The Pest Problem

DOMUS SALUSDOH-muss SAH-loos Home The Problem The Standard Resources Join the Waitlist Home/ Resources/ When Homes Fail Series Part 4...

The Chemical Bargain

DOMUS SALUSDOH-muss SAH-loos Home The Problem The Standard Resources Join the Waitlist Home/ Resources/ When Homes Fail Series Part 2...

Water Damage & Mold

DOMUS SALUSDOH-muss SAH-loos Home The Problem The Standard Resources Join the Waitlist Home/ Resources/ When Homes Fail Series Part 1...

The 3-Minute House

DOMUS SALUSDOH-muss SAH-loos Home The Problem The Standard Resources Join the Waitlist Home/ Resources/ When Homes Fail Series Part 3...

Energy Efficiency

DOMUS SALUSDOH-muss SAH-loos Home The Problem The Standard Resources Join the Waitlist E+H Home/ Resources/ Position Paper Position Paper Building...

Builder’s Guide

DOMUS SALUSDOH-muss SAH-loos Home The Problem The Standard Resources Join the Waitlist 5 Resources › Practical Guide Practical Guide Homebuyer...

IAQ & Ventilation

DOMUS SALUSDOH-muss SAH-loos Home The Problem The Standard Resources Join the Waitlist AIR Home/ Resources/ Articles Indoor Air Quality Domus...

$6.3T Blind Spot

DOMUS SALUSDOH-muss SAH-loos Home The Problem The Standard Resources Join the Waitlist $6.3T Home/ Resources/ Articles Featured Economics Wellness Industry...

Health Crisis Part 3

DOMUS SALUSDOH-muss SAH-loos Home The Problem The Standard Resources Join the Waitlist Home/ Resources/ Hidden Health Crisis Series Part 3...

Health Crisis Part 2

DOMUS SALUSDOH-muss SAH-loos Home The Problem The Standard Resources Join the Waitlist Home/ Resources/ Hidden Health Crisis Series Part 2...

Health Crisis Part 1

DOMUS SALUSDOH-muss SAH-loos Home The Problem The Standard Resources Join the Waitlist Home/ Resources/ Hidden Health Crisis Series Part 1...
Salus Evaluations

Material Health Assessments

Every material evaluated against all five Domus Principles. Use these assessments when specifying materials or evaluating a builder's proposal.

Insulation
Mineral Wool (Rockwool)
Salus-Approved

Naturally fire-resistant, vapor-open, zero VOCs, inherently mold-proof. Achieves equivalent R-values to spray foam without chemical off-gassing.

Sheathing
MgO Board
Salus-Approved

Inorganic, mold-proof, fire-resistant, zero formaldehyde. Replaces OSB as structural sheathing without the moisture and off-gassing vulnerabilities.

Sheathing
OSB (Oriented Strand Board)
Fails

Formaldehyde off-gassing, highly susceptible to moisture and mold colonization, requires chemical fire retardants. Fails three of five Domus Principles.

Insulation
Closed-Cell Spray Foam
Fails

Isocyanate off-gassing, creates vapor barrier trapping condensation and enabling hidden mold, requires chemical fire retardants. Fails Salus Standard.

Framing
Pressure-Treated Lumber
Fails

Copper compound and quaternary ammonium off-gassing, measurable soil and air contamination. Fails indoor air quality and pest resistance principles.

Siding
Fiber Cement (James Hardie)
Conditional

Good mold and fire resistance, 30–50 year lifespan. Requires careful moisture management at joints. Conditional pass — Domus-grade with proper installation.

Downloads

Guides & Specification Tools

Ready-to-use documents for homeowners, builders, and architects specifying Salus-grade construction.

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The Domus Salus Evaluation Methodology

The complete framework behind how we evaluate every material — the five Domus Principles, their principle-by-principle assessment process, evidence standards, and verdict criteria.

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Salus-Approved Material Specification Guide

A ready-to-use specification template for builders and architects. Lists Salus-approved materials by category with minimum performance requirements and acceptable substitutions.

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The Homebuyer's Salus Inspection Checklist

Walk through any new construction or resale home and identify standard-grade materials before you buy. Covers framing, insulation, sheathing, finishes, and ventilation.

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💰

40-Year Total Cost of Ownership Calculator

Spreadsheet tool comparing standard-grade vs. Domus-grade materials across initial cost, maintenance, replacement cycles, and estimated health impact savings.

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🏠

Good · Better · Best: Material Selection by Budget

Not every build can go full Domus-grade from day one. This guide presents tiered material options — the minimum viable Salus-compliant choice at every price point.

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🗣️

Contractor Conversation Scripts

Exact language to use when asking builders about materials, moisture management strategy, and ventilation design. Know what answers to accept — and what answers are red flags.

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FAQ

Common Questions

Answers to the questions we hear most often from homeowners, builders, and skeptics.

The Salus Evaluation draws on peer-reviewed building science research, EPA guidelines, ASHRAE standards, and third-party material testing data. It is a synthesis framework, not an independent laboratory certification. We cite our sources for every evaluation. Where data is limited, we acknowledge uncertainty rather than assert false precision.
Pre-1950s wood construction used old-growth timber — trees grown over 200+ years with dense grain, natural rot resistance, and no chemical treatment required. Modern dimensional lumber comes from plantation trees harvested at 20–30 years. It is fundamentally a different material. Add engineered wood products loaded with formaldehyde-based adhesives, and the comparison to historic wood framing becomes entirely misleading. The issue isn't wood — it's what we've done to wood and what we've combined it with.
Building codes establish minimum thresholds to prevent structural failure and immediate safety hazards. They are not designed to optimize indoor health outcomes. Code compliance means your home won't collapse in a windstorm — it says nothing about formaldehyde emissions from your subflooring, VOC off-gassing from spray foam insulation, or your home's susceptibility to hidden mold growth.
Yes. In an existing home, the highest-leverage interventions are: (1) mechanical ventilation (ERV/HRV system — addresses accumulated pollutants immediately), (2) finishing materials (replace vinyl flooring, synthetic carpets, and conventional paints with Salus-grade alternatives), and (3) moisture management (correct any vapor barrier errors and address drainage). You cannot easily replace structural framing, but you can dramatically improve air quality without touching the walls.
First-cost, yes — typically 15–25% more upfront. But a standard-grade home requires 3–5 major material replacements over 40 years (roof, siding, insulation, remediation). A Domus-grade home requires minimal maintenance. Our 40-year cost analysis consistently shows the Domus option costs less in total — and this calculation doesn't include reduced health costs, lower insurance premiums, or premium resale value.
Yes — the Salus Standard exceeds code requirements. MgO board, mineral wool insulation, lime plaster, and fiber cement are all code-compliant in residential construction. Domus Principles apply universally; specific methods vary by climate zone and local code.

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