Wall Insulation

Interior wall insulation guides, insulation behind drywall, vapor barrier choice, cold wall diagnostic, and thermal bridge fixes — practical advice from on-site experience.

Wall Insulation

Wet Insulation Behind a Wall: How a Pro Fixes It

Jérémy F. / May 20, 2026

You open up a stretch of drywall during a remodel — or because the paint started bubbling on a north […]

Spray foam insulation being applied to a wall — cost per square foot 2026

Wall Insulation

How Much Does Spray Foam Insulation Cost Per Square Foot in 2026?

Jérémy F. / March 31, 2026

Spray foam insulation costs –.50/sq ft for open-cell and –/sq ft installed for closed-cell. Learn what drives the price, DIY vs pro costs, and how to claim the 30% IRA tax credit in 2026.