There are many different types of flat roofing systems available each one with their own pros and cons.
Old felt flat roof.
This is done to ensure a flat surface for the roof felt.
You will be placing the second layer of felt over this.
You must remove any rotted pieces of wood on the roof and replace them with your plywood planks.
This is now one of the most widely used systems across the uk.
There needs to be an overlap in the felt to help increase the water tight quality.
Hope all goes well.
Applying roofing felt on flat roof is relatively simple and it s safer than working on a peaked roof.
Roofing felt is one of the oldest available options and advances made in the past decade or so have begun to move more towards the torch on approach.
It s best to start nailing in the center and work out from there.
Paint a thin layer of adhesive over the first felt layer.
Also you will need to remove any old felt on the roof as well as any nails or roof staples.
But if the felt roof is done with good thickness high performance felt it should last a long time depending on when it was done.
Lay down felt and secure to roof.
The old felt should be stripped off and the boarding aswell so you have a clean service for rubber or you can primer for a fibreglass roof.
Item 656632 model 0903000.