If the sagging roof is due to rotting or warping roof decking the repair will be much easier.
How to straighten a sagging roof.
Typically the roof sheathing is about three eighths of an inch thick.
How to fix sagging roof trusses or rafters.
This may be problematic in winter months but allowing the roof to continue to sag can lead to greater problems such as a cave in.
Perhaps the sheathing is the problem with your sagging roof.
If that is the case you need to.
Straighten out your old house s sagging roof and get rid of those cracks in the wall with these easy to follow steps.
And a different approach is needed at the chimney in order to add rafter support to straighten the sagged roof.
You will need to remove the shingles and the old decking however which means there will be an exposed hole in the roof.
The first step is to find out how many rafters are sagging and if anything else is damaged.
Fixing a sagging roof by bolstering the beams replacing sheathing.
Drill four holes in each side of the l.
Check the ceiling for sagging by attaching a string on one end of the beam and run it along the bottom edge of the beam.
First use your drill to drill four holes in each side of the l.
Starting at the end that s the most difficult to.
As soon as you see bowed roof or sagging in any corner of the roof call for the help of a professional.
Remove any pieces of wood broken scraps that could get in your way using a chisel.
In a 30 year old house very typically the roof sheathing is thinner than in a more modern house.
Next use a chisel to remove any pieces of wood such as splinters or broken scraps that may get in the way of your repair.
Before you try this method you need to determine whether or not the sheathing that remains is strong.
How to straighten sagging roof rafters.
You ll need a steel l channel to get your rafter or truss back into shape.
Realignment of the rafters may solve the sagging problem.
With the inverted hinged truss in place a vertical wedge can be used to bend the sagged rafter upwards.
At the chimney the homeowner designed an inverted truss to straighten the sagged rafters.
Sagging rafters may be the result of numerous heavy snowfalls or inadequate ceiling joists.
And in a 30 year old house you tend to not have very much ventilation.
To get your truss or rafter back into shape you can use a steel l channel.
Determine the extent of damage.
You may find that.
Drill holes in angle iron.
So what happens with those elements is that you get more sagging and delamination of the roof sheathing.
Fixing a truss or rafter.
Rafters support the weight of the roof and any rain or snow that falls on it.