When adding blown in insulation to an attic it s recommended to have a barrier to prevent insulation from accumulating above the attic hatch.
Attic hatch insulation dam.
But it is often a major contributor to air leakage problems.
Also behind the dam you can see a small pink line around the air handler.
So what to do.
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Work from the perimeter of the attic toward the door or hatch so that you don t trample all over the insulation you just put in.
Quick to install and reliable this is the complete out of the box solution for your attic scuttle hole hatch.
It also needs weatherstripping and caulking around the hatch trim.
Tim healeythe attic access provides a portal to the attic space while being integral to the red line air barrier.
You can see a dam built at the hatch where you enter.
If you don t already have wooden boards surrounding the perimeter of the opening you can cut some 1 3 boards and nail them into place with 6d nails.
Always cover the tops of the ceiling joists to make sure the insulation is deep enough to reach your target r value and to prevent thermal bridging the heat loss that occurs through the wood framing.
Air sealing to prevent air transported heat loss and beefing up the insulation.
The attic hatch should be treated as an exterior door so it should be insulated with the same r value as the attic insulation.
90 3 30 in 46 90 46 90.
That way when you move the hatch to enter the attic insulation does not pummel on top of you.
This is also a dam that keeps the insulation away from the air handler and keeps the insulation directly where it should lay.
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The goal is two fold.
An attic hatch can have finished trim and paint look perfect and still be a giant heat sink.
The walls of the assembly also act as a dam to retain blown in insulation in the attic.
In many cases the hatch cover is nothing more than a piece of plywood.
Of the many prerequisite tasks to adding blown in insulation to an attic perhaps one of the most important is having an air tight and well insulated hatch to limit air infiltration.
It stops the contaminant pathway of attic dust allergens and insulation particles from entering your home.
What follows are the steps i took to increase the insulation and ensure a good seal between the unconditioned attic above and the conditioned room below.
In the summers it will radiate heat down into the house and in the winter heat and warm air will escape.
The attic hatch is a also major source of heat loss through air flow.
