Hi, I'm going to install a couple of velux windows (1400 x 780) in my loft. I know I need to strengthen the rafters either side. Ideally a one piece rafter double needs to run the complete length of the original rafter, but due to the purlins being in the way this is going to be awkward. Is it ok to to use 2 or 3 sections to double up, and then add a third strengthener at the doubler joints, so in effect trippling up?
Cheers for any help.
Cheers for any help.