I have just done a front end rebuid from the inside,Altogether i have repaired six leaks,The framework and everything is now in place and complete,I need to put on the final internal boarding.Now is it advisable to use 3mm plywood or a cardboard type of thing (like on a bookcase) and wall paper after,and would it be advisable to do this internal boarding in pieces,rather than one large board as not only will it be easier to work with as buying a peice almost six and a half foot by 4 foot and then when i cut the windows out.hey there is not much boarding to see.Hope someone can help and thanks in advance,Eddie