My roof has boards under the tiles which are in good condition. Do i need to have them removed before adding new felt and new tiles. Do the board add to the insulation of the loft area.

s williams, October 2010

Hopefully you haven't removed the boarding.

Question 1. NO don't remove the boards it is better to leave them if sound and contact your local council building control office for advice on alternative insulation batts set between the rafters INSIDE the loft space.
2. Yes they do add better insulation than open battened roofs.

You may even be able to staple the roof felt to the inside but go with what the planners say.

Bob, October 2010