Most felted roofs over 15 years old will be glass fibre felt. Our company uses a
polyester based felt, fully bonded with hot bitumen, which will contract & expand,
during changes in weather condition.
This system will adhere to most types of decking, providing it is not rotten. If
decking needs replacing, we recommend 18mm ply board, roofers used to use chipboard
but this is no longer recommended. We finish the roof with a green mineral drips