[quote="woblow"]hi iam new to diy doc can you help want to do a diy loft con i have pre 1965 semi house . roof made on site by useing 4*2 timber. steep pitch. purlins & rathers @ 400 centre my plan is on 1 st fix is to double up by bolting new (4*2 )to existin rafters to make them (4*4...