Foundation & Below
Explore Owens Corning's below-grade & foundation insulation products for enhanced thermal efficiency & moisture resistance.
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Energy Code Fact Sheets

This library of fact sheets provides guidance on the use of polyisocyanurate (polyiso) insulation for below-grade applications, including foundation walls and slab-on- grade floors in commercial and residential buildings. These resources reference the requirements contained within the International Energy Conservation Code (IECC) and ASHRAE Standard 90.1, as applicable. Each fact sheet includes ...
Rmax® Below Grade is an energy-efficient thermal insulation and protection board composed of a polyisocyanurate (polyiso) foam core bonded to reinforced polymeric facers on each side. Polyiso's closed-cell and closed matrix foam core along with its durable facers create a multi-layered defense against water absorption and protection during backfill.
Understanding Wide Below Grade Foundation Insulation Before the Gallery
Below Grade Construction | Exterior insulation, Building foundation. For Wide Below Grade Foundation Insulation, this point helps readers notice the most relevant visual details before moving into the gallery.
Exterior Foundation Wall Insulation - YUAM. This note connects the source idea with the visuals in a simple, reader-friendly way.
Below Grade Solutions. This note connects the source idea with the visuals in a simple, reader-friendly way.
Looking at multiple sources also helps separate the main idea from small decorative details.
These notes are added so the page offers more than images and gives each visitor a clearer reason to keep reading.