You must remove any rotted pieces of wood on the roof and replace them with your plywood.
How do i re felt a garage roof.
Verges can then be created by using a ridge piece or alternatively nailing the final corrugation over a raised barge board.
If you already have felt on the roof remove it along with any excess nails.
When you are felting a sloped roof you start at the bottom and work your way up so that rain pours over the top of the laps and not under them.
Once the sheets are fixed into place you can install the ridges.
If using plain felt for 3rd layer you need solar reflective paint.
If you need to replace any boards be sure to coat them with a preservative.
Start at the opposite end to the prevailing winds again and allow overlaps of 125mm.
Roll the new felt out on the roof and allow it to stay on the roof for about 30 minutes.
This will make it easier to work with.
It will then need to be left for the designated period of time before the felt is added.
Once the garage roof felt has been cut to size start once again in the centre and follow the manufacturer s instructions on how to felt a flat shed roof with the adhesive.
Preffered 3rd layer green mineral.
If your going to do it properly you need 3no layers of felt 2nd layer of underlay laid opposite to 1st.
Once measured and cut line the first piece of felt up so that it over hangs the edge of the roof on three sides by enough to cover the side pieces of the roof.
Step by step guide for felting a flat roof step 1.
Install ridges and verges.