Because it isolates the concrete.
Rigid insulation on concrete wall with zees.
Choose rigid insulation wisely and consider the effect its characteristics will have on the performance of the your project overall product cost and the best way to get the bang for your buck.
Clarkdietrich z furring is used to furr out interior masonry or poured concrete wall substrates and to support rigid polystyrene mineral or fiberglass batt insulation while providing a uniform plane for gypsum panel attachment.
Concrete walls can be insulated on the interior or exterior face or by embedding the material within the wall.
Z furring must be installed vertically with the 3 4 flange against the substrate.
Closed cell spray polyurethane foam or either xps eps or polyisocyanurate rigid foam.
The best way to insulate the interior side of a basement wall is with foam insulation that is adhered to or sprayed directly on the concrete.
If your basement slab lacks sub slab foam you ll have to install the insulation above the slab.
You can use either one or two layers of plywood or osb and the subflooring can either be fastened to the concrete with long tapcon screws or it can simply float above the foam.
Protect waterproofing of exposed foundations knee walls rim joists and slab edges both below and above grade.
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Rigid foam insulation packs a lot of r value into a thin package but not all rigid foam performs the same.
Any of the following insulation materials are acceptable for this purpose.
How to glue polystyrene insulation to a concrete wall.
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.
After that thin furring strips are installed on top of the foam to provide a firm base for the drywall screws and drywall.
The brushed latex modified concrete facing laminated to 2 or 3 of dow styrofoam provides for surface protection and insulation in one easy to install step saving time and labor.
Interior insulation refers to insulation applied to the interior side of the concrete masonry as shown in figure 1.
Three basic types of thermal insulation are available rigid board batt or blanket and spray on.
Polystyrene foam boards commonly called foamboard are a clean lightweight convenient way to insulate bare concrete walls.
With a minimum of 70 recycled content the installed thermafiber products contributed to valuable leed credits helping the building earn a leed platinum certification.
The correct method of using rigid foam is to run continuous 4 foot by 8 foot sheets of the foam across the concrete basement wall making the rigid foam the de facto wall.
Interior installation using the rigid board batt or spray on methods is the least expensive method.
