Common red clay brick has an r value of 0 2 per inch while denser stronger face brick offers only 0 11 per inch.
Brick wall insulation options.
Spray polyurethane foam insulation is the recommended insulation material to use on the interior of a multi wythe brick wall subject to the caveats listed in this article.
Kingspan and celotex offer products specifically designed for this method with insulation bonded to plasterboard and with a vapour barrier.
Fiberglass is a great way to insulate an existing wall.
Celotex a 225mm solid brick wall will have a u value of around 1 7w m k and a 400mm stone wall about 1 4.
Brick is a strong durable material that has been used in homes for hundreds of years.
1 2 3 4 inch for the interior drywall.
8 inches for the brick and block.
Adding 50mm of rigid insulation will reduce the u value to around 0 4 while 50mm of mineral wool or natural insulation will reduce it to 0 5.
With a small hole and a pump you can insulate your existing walls with minimum fuss.
The average 4 inch common brick provides an r value of 0 80.
The wood walls can then be filled with insulation just as in other types of homes.
This brick is placed over a wood frame such as is used in most home construction.
3 4 inch for the furring strip nailed to the block.
The first option for installation is whereby the insulation is fixed directly to the wall.
How to insulate an old brick house tips.
Foam insulating boards are used for solid masonry walls that separate the outer masonry from the inner masonry walls.
However brick alone has very little insulating power.
External brick wall insulation.
The gs5000 product is an insulation board and plasterboard in one image credit.
External wall coating can be done using products that bond to the wall surface and even penetrate into the pores to seal.
While fiberglass often comes in batts it does come in loose fill form as well making it easy to install without tearing open any walls.
If the wall is relatively flat and in good condition this can be an effective quick method.
These can simply be summed up as either external wall insulation internal wall insulation or the third being insulation between double brick wall layers.