Weakened sheathing rotting joists and sagging insulation are some possible causes.
Flat roof sagging repair.
Remedies for a sagging roof there are a number of remedies for traditional rafter style roof frames depending on the problem and its severity.
If your roof is sagging under the weight of too many shingles ideally all the shingles should be removed and a new set installed.
Start by fastening temporary wood blocks to the rafter tails image 1.
Clean the area thoroughly to ensure the primer gets a good bond before priming the area.
Also inspect the metal or plywood gusset plates used where your wood meets on a truss.
How to repair a sagging support beam step 1.
You will need to remove the shingles and the old decking however which means there will be an exposed hole in the roof.
If structural damage or decomposition is to blame it may be best to tear out the section of roofing and repair the problem before filling the hole.
Fixing sagging flat roof joists you will have to register or login see top or bottom of page before you can post a message or view images.
Determining the problem determine where the sag is in your roof in relation to your attic.
This will protect the original porch.
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.
The most important step when fixing dips in a flat roof is to determine the cause of the problem.
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The next step is to.
Mix the crumb rubber epdm and eps expandable polystyrene beads with the greenslope adhesive using a bucket or bag and pour it out over the area.
If the sagging roof is due to rotting or warping roof decking the repair will be much easier.
With the old beam uncovered the temporary beam can be placed on the braces you ve made images 1 and 2.
Grab a flashlight and head up to your attic to inspect your roof rafters and decking specifically those where your.
Installing new heavier roofing materials or multiple layers of shingles can cause rooftop sagging even on well built roofs.
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Multiple layers of shingles and new roofing material that s heavier than the roof was designed for can cause sagging even in a well constructed roof.
Often the framing can be bolstered and beefed up internally but if the roofing material needs replacement anyway it may be best to tear off the old sheathing and install larger rafters while the roof frame is exposed.
