Most codes now allow no more than two layers of roofing before requiring a complete tear off.
Metal roof house properly done.
How to properly ground when installed on a metal roof.
Work up from the initial row starting at the lower corner in a diagonal pattern staggering the shingles to prevent gaps.
Here are some pros and cons.
One of the easiest ways to determine if your roof is degrading is by inspecting if the paint is chalking.
A hole in a metal roof system can be caused by any number of sources the hole may be from deterioration and rust or it may be from something falling onto the roof surface such as a large branch.
The first step in the repair of any metal roofing material will involve cleaning the surface.
Grounding per the code requires all the metallic stuff to be grounded and having a metal roof doesn t eliminate any grounding requirements for your pv system.
Screw a metal sheet into the wood of the roof through the tarpaper.
You can guard against this perhaps by shortening the upper roof panels and also by framing the lower roof so that it is dropped down at least to the level of the plywood from the higher roof.
Clean the repair area.
Metal roofing is also available in the form of shingles.
Start with one side of the house at the top of the roof.
Chalking is the whitish residue that can become visible on a painted or coated metal surface over time.
One thing you really have to watch is that this flashing doe snot end up having a negative pitch which pushes water uphill under the higher panels.
Can you avoid tearing off your old asphalt shingle roof by putting a steel roof over it.
Spread the tarpaper over the wood of the roof to create a new waterproof base.
It really doesn t matter what your roof is.
Install the metal edging around the roof s perimeter using 1 inch 3 2 centimeter roofing nails.
Can you put steel roofing over asphalt.
Lay the starter row of metal shingles at the drip edge and affix to the roof with metal roofing nails.
As a panel is exposed to sunlight and uv rays the paint system s resin begins to break down and degrade.