Thanks for hints guys - also been told to 'round' tops of stringers as mat will not adhere at 90 deg edges + as you say lay fillits (or filler)...
OK - have been advised that need to 'round off' stringers as mat will not do 'square' corners - lets have another go then!
Hi - anybody have any ideas as to why F/Glass mat will not attach to new wood inch by inch stringer - keeps rising off top of wood as if air...