Residential Design & Build Product Guide

Underlayment-LF

DOW High Performance Underlayment-LF, featuring a specially designed fold which allows underlayment to lay flat on the wall without humps or buckles, provides and enhanced level surface to hang new siding. The product comes in 50- X 4-ft. fanfold sections and is available in 1/4 and 3/8 in. thicknesses with plastic/plastic or plastic/reflective plastic facings. Underlayment-LF provides insulation and air infiltration properties for an energy-efficient home.