Flat garage roof with new felt. Sensitive felt, things sink into it. So placing joists on the felt feels dangerous.
I'm considering whether to remove the sheets from the outer edge and place joists on top.
If I do this, I need to build in more timber so there's more than just a thin board to screw into.
Some pictures might make the question clearer.
How would you do it to minimize the risk of damaging the felt in the future?
