Roof shingles ridge cap roof vent boots and rubber seals dormer walls and valleys roof vents and piping chimney gutter flashing downspout roof nails.
New tin roof leaking.
Roof slope in many cases a leaky metal roof might be attributed to insufficient roof slope.
If it does it s likely due to one of these three causes.
Another top reason or leaks in metal paneled roofs are faulty roofing screws.
For most roofs with metal shingles it s necessary to have four inches of rise for every foot of roof run which equates to a slope of 4 12.
Missing sealants metal roof sealants that are.
If you have a tin roof with nails in it chances are.
A quick scan of your roof from the ground may also yield some information as well.
Dig out any cracked or dry caulking that isn t properly sealing adjoining surfaces and replace with silicone caulk.
Replace any missing or rotted siding above the step flashing on dormers.
Recaulk the corner flashing if any areas have hardened caulk.
When tin is installed on the roof special self tapping screws are used.
These mistakes are not immediately evident after the installation.
The majority of the problems that cause metal roof leaks are related to the details used to finish the metal roof system.
Sometimes the water shows up at a ceiling spot distant from the leak.
Typically the areas where problems occur are not in the system selection.
How to stop a leaking tin roof leaks.
Often water runs to openings in the vapor barrier such as at ceiling light fixtures.
Mistakes in the design and installation of a new metal roof are sources of major problems.
Roofing screws are specially constructed with a rubber washer at the base of the screw head which prevents seals the water out when compressed.
Stack flashings another area very prone to leaks on a metal roof is the area around stack flashings.
In other words skylights stack lines chimneys and valleys are the most common places to see a leak if the tiles themselves are in good shape.
Leaks happen around holes.
Very old structures may have nails holding the tin in place.
If there s water damage anywhere else such as in the ceiling or along the walls then again this may need to be taken out and replaced.
A brand new metal roof should not have leaks.
These include the following.
The majority of roof leaks especially on new roofs take place around protrusions in the roof.
If your ceiling has a plastic vapor barrier between the drywall and the attic insulation push the insulation aside and look for flow stains on the plastic.