How to Replace Rubber Membrane Roofing

rubber membrane waterproofing
What You'll Need
Rubber roofing
Rubbing cleaning solvent
Latex bonding adhesive
Large paint roller
Small silicone hand roller
Rubber roof flashing
Rubbing alcohol

So it’s time to replace your rubber membrane roofing? Well you’re in luck! Instead of removing the old one, you can simply place a new one right on top of the existing layer. Not only does this save you time, but it will also cause less refuse. Plus it creates an extra layer of insulation and protection from the rain. That added layer of insulation will help to keep heating and cooling costs even lower.

Step 1 - Clean the Existing Rubber

Using the broom, remove all loose debris that may be lying on the roof. Apply the rubber cleaning solvent to the entire roof. Allow the solvent to dry for a minimum of 10 minutes.

Step 2 - Allow the Rubber to Stretch Out

After the cleanser has a chance to dry, lay the new roofing material out on the roof. Allow it to relax and stretch to its full size. This will take a few hours.

Step 3 - Begin Adhering the Rubber to the Roof

The most efficient way to do this is to fold one half back. Apply the cleaning solvent to the new rubber and allow it to dry. Using the paint roller, apply a thin even coat of the adhesive to both the old and the new rubber. If you apply too much, you can create bubbles, which you do not want as the bubbles tend to create cracks later on.

Allow the adhesive to dry slightly until it becomes tacky (this will take no more than 10 minutes). On your hands and knees, slowly roll the new roofing material over the old. If you happen to create an air bubble, use the small silicone hand roller to smooth it out and remove the bubble.

Step 4 - Adhere the Rest of the Roof

Fold back the half that you did not yet secure to the roof. Apply the cleaning solvent to this half and allow it to dry. In the same manner as before, apply the adhesive to both the old and the new materials and allow it to become tacky. Slowly roll this half of the material onto the roof, again removing any air bubbles that might pop up.

Allow the adhesive to dry for three hours and then return. Using the weighted roller, go over the entire roof double checking for air bubbles. The weighted roller will help the adhesive create an even stronger bond.

Step 5 - Take Care of the Flashing

Apply rubbing alcohol to the old flashing to break the bond of the adhesive. Cut away the old flashing and discard. Thoroughly clean the post with rubbing alcohol followed by the cleaning solvent. Peel away the backing on the flashing and clean that side with the solvent as well. Apply the flashing to the post. Allow the adhesive to dry for 24 hours, come back and inspect your handy work.