Once upon a time good quality greenhouses were made of red cedar - usually Western Red Cedar IIRC.
A friend needs to renew the roof of his lean-to greenhouse and is having trouble locating WRC at timber merchants or on the net.
I have had a quick Google and the hits all seem to be for shingles or some other kind of cladding.
Is there a good source of WRC in 2*4 or less, or is there an acceptable alternative?
Using Tanalised timber in a greenhouse may not be particularly good for the plant life.
TIA
Dave R