Hi I have not had a mini for years , I think the best way is to lower the heater two bolts under the dash it should swing down just enough to get your hand in.
good luck
dave
Hi thanks for your reply,
Its am old concrete garage and not very straight, but I like working with wood, also it will be cheeper.
Also I intend to insulate the roof with polystyrene, would this be any good.
thanks again
dave
Hi I am going to replace my garage roof with plywood and felt . Can anyone please tell me how many layers and what grade of felt to use. The roof will be pitched.