How To Weld A Membrane Roof

Kee membrane seams membrane welding pvc roofing single ply thermoplastic membranes tpo.

How to weld a membrane roof.

Epdm membrane is rolled out on the flat roof then the contractor returns and secures the seams with a layer of seam tape or an additional adhesive. One of the key benefits of thermoplastic membranes is the ability to heat weld their seams and create a permanent seal. Both new materials and for roof membranes exposed to the elements so as to ensure a proper weld. The only way you will get a consistent weld is by removing the water from above and beneath the membrane and allowing the membrane time to naturally dry out before using acetone.

Epdm cannot be welded and cannot be re taped when the weather is too cold to use primer and adhesives requiring a temporary fix until the weather warms up. The preparation includes making sure that you have all the materials delivered and you have all. The welds are tested by pulling the weld apart by hand. Single ply roof membranes are typically categorized as thermoplastic membranes.

Cut a 1 25 mm wide strip across the welded material. Slowly but consistently work your way down the seam rolling over both layers with steady pressure on the seam roller with long steady strokes till you reach the end of the seam or area you are welding. How to install tpo roof membrane easy photo guide step 1. Good welds require a lot of force but it s the way the weld comes apart that s the key.

The two most common thermoplastic single ply roof membranes are polyvinyl chloride pvc and thermoplastic olefin tpo. Thermoplastic single ply roof membranes have been around for more than 40 years. Tpo is thermoplastic so you can heat weld seams and it s ideal for repairs. As you begin to weld by heating the membrane always use the seam roller at a 90 degree angle to the heat gun.

Another option when not wanting to use a solvent cleaner is to position the repair under the existing membrane which in theory should be clean and free from moisture. Weld the 18 457 mm pieces together and then allow the membrane a few minutes to cool.