What Types of Closed-Cell Rigid Insulation Are Waterproof?

Polyiso, XPS, and EPS closed-cell rigid foam board insulation offers efficient, water-resistant home insulation. It can serve as a vapor barrier in above- and below-grade home construction and remodeling applications.

Insulation R-Values Chart and Buyer Guide

Add a Vapor Barrier with Spray Foam Insulation?

Deane Biermeier

Does Foam Insulation Keep CMUs From Drying? - Fine Homebuilding

A Complete Guide to Spray Foam Insulation for Metal Buildings

Is Polyiso Insulation Waterproof? — Rmax, 59% OFF

How to Get Foaming Insulation Off Clothes

Touch 'n Foam System 200 Spray Foam Insulation Kit

Nonexpanding Foam Types