How To Insulate Concrete Block Walls

The variety of concrete masonry wall constructions provides for a number of insulating strategies including. Step 4 perform the proper insulation. This can be done with pretty much any rigid insulation.

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The best way to install rigid foam on a concrete block wall is as a continuous layer.

How to insulate concrete block walls.

Your only option is to cover the inside of the exterior walls with a continuous layer of insulation as though you were insulating a basement wall. While these are the options again the material available to use depends on whether the walls will be covered or the open top is exposed like in a remodel or new build. The simplest and most affordable method of insulating the interior of a block wall is to install rigid foam board insulation. And there is no effective way to fill the voids in an existing concrete block wall.

Therefore it is recommended to wear a long sleeved shirt long pants and light work gloves. The option for insulating concrete block walls includes spray foam insulation injection foam insulation polystyrene beads foam boards and loose fill masonry insulation. Make this layer of rigid foam as thick as possible. Then install 1x4 furring strips 16 inches on center on the interior side of this continuous layer of rigid foam.

Before insulating coat the exterior of the walls with fluid applied water control and air control layers. When it comes to how to insulate a concrete block house with solid walls applying the insulation material is a bit like waterproofing your home leaving your wall completely dry and resolutely resistant to moisture. Fasten the furring strips to the concrete blocks with tapcons or similar masonry screws. Place the insulation between studs joists and rafters stapling them into place as you go.

Once the foam starts to seep through the injection holes indicating a full cavity encompassing several blocks the process is repeated along the length of the wall every 4 feet and then again along the top of the wall about a foot short of its full height. Available in large three by five or four by eight sizes the panels. Fiberglass insulation may irritate exposed skin areas. A respirator mask and safety goggles are also helpful.

In fact your walls will absorb up to 95 less moisture than an untreated wall. In your climate zone zone 5 code requires you to insulate concrete block and other mass walls to at least r 13 if all of the insulation is on the exterior. Interior insulation insulated cavities insulation inserts foamed in place insulation granular fills in block core spaces and exterior insulation systems.

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