Choose by assembly
Start with the part of the building you are changing.
Each project guide begins with existing conditions and stop points, then compares practical insulation paths.
Attached Garage Insulation: Air, Fumes, Fire Separation, and Foam
Plan attached-garage insulation around the house boundary, vehicle fumes, pressure, fire separation, rooms above, and local code requirements.
Read the guideBasement Wall Insulation: Diagnose Water Before Adding Foam
Choose a basement wall insulation path after assessing drainage, masonry moisture, foundation condition, drying, framing, fire covering, and radon.
Read the guideCrawlspace Spray Foam: Water, Ground Vapor, Radon, and Termites First
Plan crawlspace insulation only after drainage, ground vapor, radon, termite inspection, combustion equipment, and venting strategy are resolved.
Read the guideHow to Compare Spray Foam Contractor Quotes Before You Sign
Compare spray foam proposals by assembly boundary, preparation, thickness, exposure controls, fire covering, inspection records, and exclusions.
Read the guideRim Joist Insulation: An Assembly-First Spray Foam Guide
Plan rim-joist air sealing and insulation around moisture, masonry, framing, combustion clearances, termite inspection, and fire covering.
Read the guideSpray Foam for Attics: Floor or Roof Deck First?
Decide between a vented attic floor and an unvented roofline before choosing foam, thickness, ventilation, or a contractor.
Read the guideSpray Foam in Exterior Walls: Open Cavities vs Retrofit Injection
Plan wall insulation around rain control, sheathing, vapor profile, thermal bridging, wiring, fire blocking, and whether the cavity is open or concealed.
Read the guideA useful next step
Turn the reading into a plan.
Answer seven practical questions and see which conditions to investigate before choosing a material.