Model Railway Forum

Marine ply same dimensions £67.80. That's why I used the basic one. As you say not needed indoors. R-

RogerB wrote: ↑Mon Dec 05, 2022 8:40 am Marine ply same dimensions £67.80. That's why I used the basic one. As you say not needed indoors. R-

Depends if ones roof leaks? Mind you, cheaper to fix the roof and use ordinary ply at those prices!
(Our roof is fine. Just my humour).

No one has mentioned compressed paper board sold under the name 'Sundela'. A lot of good model shops stock it as 1200 x 600 mm sheets (4 x2 feet for wrinklies), 12 mm (1/2 inch) thick. Fine and takes pins BUT tends to droop in high humidity and so needs more support at reduced spacings to that recommended in the manufacturers instructions ( in my honest opinion, that is).
It needs to be 'conditioned' before laying, as per instructions, and can be glued easily to a timber underframe. The recommended wood is 50 x 25 mm (2 x 1 inch) but I have used deeper material on the perimeter and less heavy as cross and longitudinal supports, but it needs closer spaced supports if it done this way.

There is a very good reason why that stuff has not been mentioned..

Sundela is excellent for notice boards, that’s just about all really.