When the metal expands it is pressing against the brick and mortar at each end causing pressure at the weakest point.
Mortar cracks above garage door.
There must be an allowance at each end of the lintel for the expansion of the metal as it gets warmer.
This is due to the daily and seasonal differential movement between the steel and the brick materials which expand at different rates.
The two most common causes of cracks above the garage door are foundation settling or sagging of the lintel.
Cracks in the mortar above garage doors are common and often the lintel sags in the middle.
Most of them fall somewhere in between once they start to become noticeable and attract enough attention to have a homeowner looking for solutions.
The original cause of a sagging lintel and cracks is generally poor design.
Step 1 determine the cause of the crack.
Cracked brick over the garage door can be fixed most often depending on the severity of the crack or the exact cause of it.
We provide sagging lintel repair brick repair masonry repair tuckpointing and masonry restoration services in the fort worth and dallas areas.
Fixing sagging lintel and cracks above the garage.
The usual culprit is the steel that supports the masonry above these openings.
While major settling will require foundation repair to correct the problem before repairing the brick most cases are minor settlement and can be easily repaired by removing the damaged mortar and bricks and replacing them.
Cracks in the concrete can be very thin and minor or they can be more than an inch wide and they can span the entire length of your garage.
Before the damage gets even worse make sure to repair the crack as soon as possible.
In time the bricks over the garage door can crack due to water pressure or heavy impact.