How to fix a sagging roof

Question

Why does a roof sag with time? Is there something that can be done about it??

Declan · Answer

If your roof isn't properly distributing water away, then the excess moisture can cause roof seething to rot or decay which then leads to sagging. Replacing the sheathing with new material might be necessary in order to fix the issue.

Dale · Answer

It could be a few things 
1. The rafters need looking or changing
2 Rotten batons
3 Broken membrane

Kye · Answer

Change the roof new joist’s new boards n rubber if flat if not felt Batton n slate or tile use the new rubber Firestone rubber thick Baord and solid joist’s

Jamie · Answer

Check the Beams. Firstly, you must check the state of the structural beams. ...
Inspect the Roof. You must inspect the rest of the roof structure. ...
Drill Holes. Once you've found the cause of the damage, you need to fix it. ...
Remove Chips and Splinters. ...
Mount to a Rafter. ...
Add Bolts.

Simon · Answer

The timbers are rotten, water holding in the roof, basically you need a new roof.

Leon · Answer

If a roof starts to sag whether it’s a pitched roof or a flat roof it’s down to the main roof joists which are more than likely broken/damaged and starting to give way causing the roof to sag

Danny · Answer

The answer is how long is a bit of string, the roof needs to be strengthened up, it’s not a simple fix to get it straight, it can have more supports fixed in to prevent further damage to get it straight again means dropping it down and start again.

Karl · Answer

Look at it like this, as we get older as humans we also sag, unfortunately. The timbers in question are probably a century old so this is common, especially if there was not enough supporting timber installed when the property was built.

How to fix a sagging roof

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