Below Grade Insulation Board
That portion of the rigid board which extends above grade should be mechanically attached and protected.
Below grade insulation board. Below grade under slab system with foamular extruded polystyrene rigid board insulation and radiant heating. Insulating properly below grade can help prevent total structure heat loss and reduce heating and cooling bills by 10 20. Get all the construction documentation you ll need in a single click. Lack of foundation insulation on below grade and under slab projects can account for up to 25 of a structure s total heat loss.
Below grade foundation wall with foamular 250 for impact and puncture resistance to protect the waterproofing membrane during backfilling and insulate the foundation basement wall. Two of the rigid foam insulations most commonly used below grade and under slabs are expanded polystyrene eps and extruded polystyrene xps. An easy way to recognize eps on the jobsite is that it is commonly white. Wallguard insulates and protects areas from just below grade to where your heat lost begins around the exposed area of your building foundation.
These three tips will help your firm select a cost effective and high performance rigid foam insulation type for your next below grade insulation job. It also discusses installation procedures for below grade and under slab insulation. Around the slab edge or rim joist is an area that can account for 10 or more of your total heat loss. Because insulation installed on below grade building foundations and under concrete slabs is often exposed to moist soil it is crucial to choose an insulation that has minimal long term moisture retention and the ability to dry quickly.
Exterior insulated below grade insulation rockwool rigid stone wool insulation has been icc es validated to be used as a continuous exterior insulation on the exterior of a foundation wall. Below grade insulation is important both for the longevity of your structures and for the earth. Confirm long term thermal performance. Two common rigid foam insulations specified for below grade applications are expanded polystyrene eps and extruded polystyrene xps.