There needs to be an overlap in the felt to help increase the water tight quality.
Old felt flat roof.
Applying roofing felt on flat roof is relatively simple and it s safer than working on a peaked roof.
This is now one of the most widely used systems across the uk.
Lay down felt and secure to roof.
Hope all goes well.
Item 656632 model 0903000.
It s best to start nailing in the center and work out from there.
Unlike a steep roof laying roofing felt on a flat roof is easy for even novice do it.
Gaf shingle mate 36 in x 144 ft 400 sq ft felt roof underlayment.
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.
There are many different types of flat roofing systems available each one with their own pros and cons.
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.
Also you will need to remove any old felt on the roof as well as any nails or roof staples.
You wan walk over the roof to remove any air bubbles that may form.
Paint a thin layer of adhesive over the first felt layer.
You will be placing the second layer of felt over this.