Homeowner checklist

Basement and foundation insulation: inside or outside?

Use these steps to plan, check and keep a record of your next actions.

• Confirm the foundation material and condition before comparing insulation systems.
• Have water entry, drainage and drying constraints assessed first.
• Request a drawing of the thermal and air-control layers and their connections.
• Ask whether soil, frost exposure or past movement changes the design.
• Retain product protection details, approvals and photos before concealment.

Notes & questions to follow up