Concrete block brick and even stone.
Insulating attic crawl space doors.
Rigid foam insulation works for any type of masonry wall.
This type of insulation may be faced with silver foil with the foil facing inward toward the crawl space.
Then add insulation batting to form a pillow and wrap it up like a birthday present as shown.
Here s one good method.
Insulating a crawlspace door short of ripping the door out there is a simple fix you can do to increase the r value.
As you can see using the flame test the door is a little crooked which leaves a gap at the top and the bottom which allows cold air to flow into our closet.
Premier 2400 series aluminum universal access door 24 x 24 screwdriver latch 4 5 out of 5 stars 7.
Crawl space insulation increases energy efficiency saving you money and protecting against burst pipes and other disasters.
The access door is in our closet which is fine except the fact that the crawl space has very little insulation and neither does the door.
You can add insulation and weather stripping to the door you have.
Crawl space door without louvers for crawl space access ventilation or encapsulation white 16 height x 32 width 4 4 out of 5 stars 2.
Two inch expanded polystyrene foam board is the favored insulation for crawl space inside walls.
On the door pictured below i added a 1 foil insulation board to the back of this door adding an r value of 6 5.