Installation Process
Step 1: Blower Door Test
- A blower door test measures how “leaky” your home is.
- It is done before and after weatherization work to track improvements.
Step 2: Attic Insulation
- Gaps or holes in the attic floor are sealed.
- Cellulose is blown to fully cover the attic floor.
- Recessed lights may be boxed with foam to prevent heat loss.
- Baffles are installed to ensure proper attic ventilation.
Step 3: Wall Insulation
- Can be installed from inside or outside, depending on your home.
- Installers drill holes between wall studs to fill each cavity.
- Holes are patched; a handyman or painter may be needed for finishing.
Step 4: Other Areas
- Cellulose can also be added to garage ceilings.
- Polyiso foam boards and fiberglass batts may go in knee joints and crawl spaces.
Mass Save generally does not air seal alone, but air sealing is included when adding insulation. This can include:
- Sealing leaky ducts
- Adding weatherstripping around doors
Proper insulation before upgrading your heating system can cut energy costs by up to 20%.