Kevin from thunder bay ontario has a sag in his roof that he wants to shore up.
Roof sagging do to inproper bracing before and after.
This is because too much weight can cause the entire structure to weaken and start sagging especially if there s too many layers of shingles on your roof.
Nail braces vertically every 4 feet along the top and bottom of a gable truss.
Bracing up a sagging roof.
First kevin you need to inspect inside to be sure it is not sagging because of rot in the roof joists.
Being nervous about a sagging roof is understandable.
Every roof is designed to support a specific maximum weight and anything above this especially for long periods can cause the roof to sag.
The help of a second or third person is necessary even to lift a truss onto a single story roof.
If they are sound but just not properly supported from below you can guild a knee wall half way up the roof just like as if you.
Excess weight from snow and design flaws.
A load bearing wall is a structural wall that may carry the weight of the roof the weight of upper floors and even the weight of a rooms ceiling.
When sagging gets too severe it can lead to roof collapse and once the roof goes the house won t last for long.
Check out the before and after pictures here.
Other contractors sometimes install what is called a hog trough along the ceiling joists to bear some of the weight but i have found that over the years the brace does not do its job and the ceiling joists start to sag.
Please practice hand washing and social distancing and check out our resources for adapting to these times.
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.
Most people without any construction experience know that a roof should be flat and not wavy or sagging.
It is best to brace the inside of the trusses before handling them.
Stay safe and healthy.
A sagging roof can come in one of a few classic forms each with its own cause.
Use a t brace to support the truss vertically.
Oct 23 2017 4 bracing a sagging camper roof youtube.
Install 2x4s at a 45 degree angle.
Prevent this unfortunate series of events by bracing your rafters to make them sturdy and resistant to snow loads and wind.
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 weight is often referred to as the load the load starting with the roof and everything under the roof gets transferred downward to the footings.
Depending on the degree of sagging your contractor might need to use jack posts to raise the roof before installing any reinforcement.