Depending on the degree of sagging your contractor might need to use jack posts to raise the roof before installing any reinforcement.
Roof sagging do to inproper bracing.
Another approach is to give more support to the walls by installing chains attached to the wall plates and linked in the middle with a turnbuckle.
Step 2 lift trusses onto roof.
Undersized rafters also can cause sagging along the whole side or plane of a roof.
If you have just stepped outside your house and realized that your roof is no longer straight this could signal a problem.
Use a t brace to support the truss vertically.
Some barns require at least one come along as a permanent fixture strung across the haymow to keep them from continuing to buckle outward.
Being nervous about a sagging roof is understandable.
No matter what the reason when you see a house with a sagging roof it tends to make you nervous even if you don t know precisely why.
If the framing is sound and problems are not found elsewhere but the roof still sags the problem might have originated because of poor installation of the plywood sheathing or shingles.
Incomplete photos but enough.
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 help of a second or third person is necessary even to lift a truss onto a single story roof.
When sagging gets too severe it can lead to roof collapse and once the roof goes the house won t last for long.
Sagging rafters are a sign that a house is in serious trouble.
Install 2x4s at a 45 degree angle.
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.
Fixing a sagging roof as soon as you spot it is very important otherwise you could find that the problem will only worsen over time and in the end you may need to have the entire roof replaced which could be extremely costly not to mention a lot of hassle.
If your roof is seriously sagging you may need a come along in order to winch the sides of your building back into place before you add bracing.
Most people without any construction experience know that a roof should be flat and not wavy or sagging.