Window Fitters Guide to Window Installation 91 ©2022 AWDI, LLC Do not reproduce without permission Step 5 Step 5: Stick lengths of impregnated slow expansion foam tape to the two jambs and across the head of the window. Extend the Acrylic impregnated slow expansion foam tape on the head about 1 inch longer to accommodate shrinkage. Fold down the overlap to prepare for inserting the window. Step 6: Insert the window into the opening taking care to be sure the impregnated slow expansion foam tape is not disrupted. Use a flat blade putty knife to adjust foam tape to avoid any disruption. Using a screwdriver, lift up the overlapped foam tape on the header to allow proper seating of the joint during expansion. Step 6 Photos courtesy of Illbruck SAMPLE MANUAL
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