You will follow the same process as in step 2 for the last layer.
How to fix a flat roof with felt.
For older felt roofing a patch of torched on roofing with add an additional layer and fix the damage.
If the old layer of felt roofing is in good enough condition then a liquid system repair can be applied.
Cover the edges of the roof with strips of felt before laying out the final layer.
Apply another layer of adhesive to the top for maximum waterproofing.
Get a can of a waterproof roofing cement from the store.
Cut a piece of new felt to use as a patch big enough to give above a 50mm 2 inch overlap beyond the repaired blister.
You can either measure the roof from the ground or by standing on a ladder and actually going.
Press the patch firmly into place and make sure that the edges are well sealed.
Fibreglass flat roof repair.
You must remove any rotted pieces of wood on the roof and replace them with your plywood.
Step by step guide for felting a flat roof step 1.
Please ensure that the user of a torch flame to conduct repair work on felt roofing is insured to work with naked flames and always have a readily available and easily accessible fire extinguisher to hand.
You can cover the surface of the felt with gravel for added strength.