Insulating Concrete Block Walls Above Grade

This article deals with a block wall above grade.

Insulating concrete block walls above grade. If the floor is concrete slab on grade any furring boards that make contact with the floor must be of treated wood. A few tips for building with insulated concrete forms garage doors and other openings wider than 8 feet need bracing. Of unfaced expanded polystyrene r 15 that allows the foundation to dry inward and condition the space with air from inside the house. Rigid foam board insulation such as polyisocyanurate or expanded or extruded polystyrene are used on the exterior of walls.

Interior insulation refers to insulation applied to the interior side of the concrete masonry as shown in figure 1. Standard two by four studs installed flat on the wall provide 1 1 2 inch. 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 insulation may be rigid board extruded or expanded polystyrene or polyisocyanurate closed cell spray polyurethane foam cellular glass fibrous batt or fibrous blown in insulation note however that fibrous insulation is susceptible to moisture.

Ideally treat it like a mini basement. The insulation boards are attached with adhesive or with mechanical fasteners. Now as you glue the panels to the exposed concrete blocks leave a inch gap at the floor and ceiling and cut holes in the panels to fit around outlets and wall switches. He is thinking about stripping it back to the block and then working from the inside to make an insulated wall accepting that he might have to loose a.

For a below grade block wall see basement perimeter drainage and leaking foundations. The option for insulating concrete block walls includes spray foam insulation injection foam insulation polystyrene beads foam boards and loose fill masonry insulation. But in markets across the south especially florida it s the way to build the first floor of almost all homes. After the adhesive cures add extension boxes to the outlets and switches and spray foam into every gap top bottom and around each box.

Parge the exposed above grade portion of foundation walls and overlap the top 2 inches of the waterproofing membrane. Several types of insulation materials can be placed in the cores of concrete block.