Once you have your wood in place you need to lay.
Roof sagging in middle.
A ridge that droops in the middle forming that unintentional western design feature likely is due to undersized rafters and or missing or inadequate internal bracing rafter or collar ties.
The first step is to always check the beams so that you can determine their condition.
Sagging roof lines can originate with the horizontal ceiling rafters.
Non foundational reasons for a sagging roof.
The home may not be designed to support the weight of this extra roofing material and it will sag.
A sagging roof can come in one of a few classic forms each with its own cause.
If you find an infestation of.
Common flaws include undersized rafters insufficient sheathing or too few rafter or collar ties.
When the roof framing is assembled two ceiling rafters are often joined together to create a longer span.
Next assuming that there are no further problems with your timber beams you need to measure the length of the beam.