I have a recently built extension and have seen bees getting between the sarking membrane and the Marley concrete roof tiles. I am concerned they may find their way through an overlap and get into the void.
The main house has a black plastic comb like strip to prevent insect access.
I am wondering if I should try sliding the bottom row of tiles up and fitting some. Should the tiles normally just slide up? What is the strip called? Any alternatives without disturbing the tiles - or are they easy to move without damage?