Decking and/or T&G boards (Bilton HG1)

Old and/or new decking boards and/or tongued and grooved boards urgently needed, for a charity project. A collapsing flat roof requires a solid covering. It will eventually be built over, with a pitched roof. In that, a nesting box will be created for barn owls. Those have been using such a box, in a pitched roof created some miles away. Unfortunately, I can't work out how to attach a photo' here, of one of the barn owls sitting at the entrance to that box, near the apex of the roof. It may be an adult or one of its young, all of which have now fledged.