If you notice that there is a visible dip in your roof chances are you have a problem with one or several rafters and you may soon be facing more issues like water leaks bowed out walls or your roof caving in on you.
Roof sagging slightly.
Climb into the attic and familiarize yourself with your roof s structural anatomy.
When the roof framing is assembled.
When a roof begins to sag it is likely that there is an issue requiring attention.
Causes of a sagging roof and repair options water damage to a weak roof surface.
Every roof is designed to support a specific maximum weight and anything above.
Sagging rafters can lead to serious problems with the entire roofing system.
Foundation problems with the house.
Next assuming that there are no further problems with your timber beams you need to measure the length of the beam.
It s above your head.
Use your string line to determine how much the roof need to go up.
If you find an infestation of.
Excess weight from snow and design flaws.
A wavy or sagging roof can be the result of one of several issues.
Another type of.
Rain and snow can quickly damage a roof that isn t optimally designed and well.
I would think any amount of sagging is probably bad especially if there is no weight overhead.
Once you have your wood in place you need to lay.
What causes a sagging roof line.
If the sagging appears in the plane of the roof that is up and down between the ridge and the eave and from side to side the sagging is probably due to deflection and creep of the rafters themselves figures 8 and 9.
It is normal for it to sag a bit when you are walking on the roof but is it sagging by itself.
The first step is to always check the beams so that you can determine their condition.
All flat roofs have a slight slope for drainage which can be created by the frame itself or by a sloped layer of insulation or other material underneath the exposed roofing.
If your rafters are still sagging a bit and it is causing your roof to dish out a little in the center of the roof sides add a 2x4 that goes all the way across the rafters in the center of the length of the rafters.
Sagging or low spots in a flat roof may be due to undersized or weakened roof joists or problems with the buildup layers beneath the exposed roofing.
Deflection is the immediate sag produced when an object is set on a structural member.
Most people without any construction experience know that a roof should be flat and not wavy or sagging.
Is the roof wet or does there appear to be any current or previous water damage.
The roof could end up collapsing if the problem is not mitigated and fixing the issue will cost the homeowner.