Your first ten minutes
Your first steps to a better-insulated home.
Understand your project, compare your options, and find the checks that matter before you buy or begin.
Decision path
Six questions worth asking first.
- 01
Name the assembly
Attic floor and roof deck are different assemblies. So are a basement wall and a rim joist. Choose the physical boundary first.
Choose a project → - 02
Find the moisture source
Bulk water, ground vapor, indoor humidity, and air-carried condensation need different controls. Foam is not a leak repair.
Map moisture and drying → - 03
Place the control layers
Decide where water, the air barrier, vapor, and thermal control belong. Insulation is one layer in a connected enclosure.
Understand control layers → - 04
Pass the safety stop
Occupants, ventilation, combustion appliances, wet materials, wiring, heat sources, and local fire protection can move the job out of DIY territory.
Check the professional boundary → - 05
Compare material paths
Spray foam may solve air sealing and insulation together. Fiberglass, cellulose, mineral wool, or rigid foam may be more repairable or forgiving.
Compare in context → - 06
Then estimate and research products
Calculate generic volume in board feet first. Exact kit selection and current product evidence come only after the format and application are clear.
Estimate board feet →