If roof vent tiles are fitted do they have to have a hole cut in the felt underneath for the air to pull through the attic?
The reason I ask is we have two on each side of our roof and on one side there are holes cut in the felt for the vents, but not on the other.
The reason I ask is we have two on each side of our roof and on one side there are holes cut in the felt for the vents, but not on the other.