Insulating Concrete Block Walls Above Grade

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.

Insulating concrete block walls above grade.

But in markets across the south especially florida it s the way to build the first floor of almost all homes. If the floor is concrete slab on grade any furring boards that make contact with the floor must be of treated wood. Several types of insulation materials can be placed in the cores of concrete block. 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.

The insulation boards are attached with adhesive or with mechanical fasteners. 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. After the adhesive cures add extension boxes to the outlets and switches and spray foam into every gap top bottom and around each box. A few tips for building with insulated concrete forms garage doors and other openings wider than 8 feet need bracing.

Ideally treat it like a mini basement. Parge the exposed above grade portion of foundation walls and overlap the top 2 inches of the waterproofing membrane. Of unfaced expanded polystyrene r 15 that allows the foundation to dry inward and condition the space with air from inside the house. The option for insulating concrete block walls includes spray foam insulation injection foam insulation polystyrene beads foam boards and loose fill masonry insulation.

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. Rigid foam board insulation such as polyisocyanurate or expanded or extruded polystyrene are used on the exterior of walls. Above grade perimeter walls built with concrete masonry units or cmus may only represent about 7 of the new home construction market nationwide.

Bryan is faced with a totally un insulated cinder block wall with 1x2 strapping and a plaster covering. For a below grade block wall see basement perimeter drainage and leaking foundations.