Insulation ISO Board 3.5" 4X8 20.5 R/Value (13 per lift)

Boost energy efficiency with rigid insulation that's easy to work with. This board adds continuous R-value and moisture resistance to walls, floors and foundations.

Key Features

• Rigid board with R-value as specified
• Moisture resistant
• Lightweight and easy to cut

Common Applications

• Foundations, basements and under slabs
• Exterior continuous insulation

Related Products & Sizes

• Also available in: 2" 4X8 2.0; 3" 4X8 17.1
• Foam-compatible adhesive and tape
• Cap nails and fasteners

Installation & Use Notes

• Use foam-compatible adhesives
• Protect from UV and seal seams with tape