Hi we are building a medium size garage 1.5 storys high with dimensions 7m x 4.5 m the ridge runs along the 7m length and the pitch is 30 degrees to support open timber rafters and natural slate roof. The recommendation is to get a structural engineer to work out the load. Is that our only option. The cost we have been quoted for this is £450 + vat. Does that sound about right?
Thanks in advance of any comments and help.