Installation Instructions for Duro-Last Single-Ply Roofing

Measure the dimensions of your roof. Make a map of the roof if it isn’t a square or rectangular so that you can mark the roof’s dimensions in sections. Use these measurements to order the prefabricated roofing membrane for coverage.

Remove all dirt and debris from your roof with a broom. Spread the membrane out over the roof. If the membrane is sectioned, then overlap the sections by 4 inches at the seams until it fits along the contours of the roof’s shape.

Fold the roofing membrane in half, with the half nearest the edge of the roof over the center of the membrane if multiple sections are involved, to reveal half of the roof’s surface.

Roll the adhesive over the exposed surface of the roof and over the piece of membrane exposed from folding with a paint roller. Allow the adhesive to set slightly to the point where it produces strings when touched.

Fold the membrane back over the exposed roof to bring the two adhesive-covered surfaces back together. Brush the membrane with the broom from the fold to the edge to remove air pockets and to smooth the surface. Repeat the process with the other half of the membrane.

Continue to cover the roof with the membranes until it is completely covered.

Weld the seams of the roofing material together with hot air from a handheld welder. Make the weld 1-1/2 inches in width in a strip along the seam’s edge. Roll over the seam with a silicone roller, as you create the weld, to make certain that both pieces of the membrane are tightly held together.

Use metal flashing around objects that exceed 120 degrees Fahrenheit, such as chimney pipes. Do not extend the membrane up the sides of heated objects, instead place it around the base of the flashing material to avoid damage. Terminate the flashing at least 8 inches above the surface of the membrane.