First Defense Insulation – Sealing and Insulating Your Attic Hatch

A inadequately sealed and insulated attic hatch is one of the most typical defects on a Home Inspection Report. Why should I worry about my attic hatch, you may be wondering. Due to the phenomenon of hot air rising, a house loses around 25% of its heat via the top storey ceiling. The attic hatch is a wide aperture in the ceiling that allows rising air to exit the house, speeding up the effect. If you’re fortunate, you’ll only lose heat in the winter and get heat from the attic in the summer. If you’re unfortunate, the humid air that escapes may condense in the cool attic, resulting in mould and maybe structural deterioration. If you would like to learn more about this, please check out First Defense Insulation

Try these simple procedures to lock in the air and secure your attic to prevent your attic hatch from draining your funds. This inexpensive DIY home renovation project takes just a few hours and might save you thousands of dollars over the life of your house. To me, it seems to be a wise investment.

I’m going to assume you have an uninsulated plywood attic hatch for this technique.

You’ll need the following items:

Rigid Polystyrene Insulation 2″ thick

Weatherstripping for Attic Hatches

Foam-Friendly Glue

Caulking is a term used to describe the process of

Four Draw Catches or Hook & Eye Latches


A Straight Line

Tape Measurement

The Hatch Should Be Insulated

Remove your existing attic hatch and measure its dimensions. Cut four pieces of Polystyrene Rigid Insulation about 1/2 inch smaller than the hatch’s dimensions to slow heat loss and add ballast to the hatch to improve the seal at the weatherstripping. Fasten the insulation to the back of the hatch with foam compatible glue.

The Hatch Opening Is Air-Sealed

If there is any existing weatherstripping on this lip, remove it with a putty knife and instal new weatherstripping along this lip, making sure there are no gaps. Apply caulking along the trim/ceiling joint on the inside to prevent air leakage.

Latches and Handles Installation (Optional)

Install two handles on the inside of the hatch to aid in bringing it down against the weatherstripping, and four latches on opposite sides of the hatch to secure it against the compressed gasket as you draw it down.