Hello all, I bought a house few years ago and the roof membrane was already not in the best state. Now there is few holes and during last winter, when the wind was quite strong, it was blew a bit of snow here and there. Now I know the proper way would be to remove the tiles and replace the whole membrane, but I doubt i will be able to afford it at the moment.Could you please let me know:- what cost do I face to do it properly inc the scaffolding (it's a semi detached, 2 storey house)- do I need the membrane at all- could I possibly "replace/fix" the membrane from inside, so cut it to smaller bits and attach in between rafters, to the side of the rafter using tape etc.Thanks in advancePeter