Here are the layers of a roof in order of application bottom to top.
Multi layer roof exclusion.
A common exclusion doesn t cover any work you did prior to your policy period.
If the roof has multiple layers typically the insurance company will only insure the top layer.
If an additional layer of shingles is added to the roof then that too could be excluded.
Adding a second layer could compromise the structure of your roof.
So let s say we have a hail storm and the roof takes a beating.
The fiberglass roof was easier to clean but forget about trying to keep any type of gloss on it.
Homeowners must also be cognizant of the portion of the total home insurance that would be available for covering expenses with the roof.
Multiple layer roof limit.
Often there is a problem with the first layer of shingles that was not apparent.
The purpose of such practice is the elimination of thermal bridging prevention of thermal loss at insulation joints reduction of moisture migration into the roof system and reduction of membrane splitting all benefits provided by multiple layers of roof insulation.
Multi layering of roof insulation.
Many roof decks were designed to handle only one layer of shingles.
Two layer pitch roof description rafters at 400mm centres u value superquilt 2 layers with 40mm insulated plasterboard xps 1 070 m 2k w 0 18 w m 2k superquilt 2 layers and 50mm pir 0 022 w mk 0 15 w m 2k.
A second layer of shingles only complicates the job when a roofer is trying to fix a leak.
I recently sold my winnebago adventurer with a one piece fiberglass roof and purchased a fleetwood providence with the multi layer roof.
Roof system recovery limit.
You can usually see the underside of plywood decking from the attic.
When installing two layers of superquilt a 38mm air space should be maintained between layers at all times.
Certainteed supports the industry standard recommendation for multiple layers of roof insulationinstalled with offset staggered joints.
Mine seemed to oxidize almost overnight.
There is ordinarily a limit on the number of layers of shingles that are allowable for coverage.
It provides structure by tying the trusses and joists together.
New construction exclusions you re classified as a re roofer because 90 of your business comes from re roofing homes due to hail damage.
Decking most often made out of plywood this roof layer is installed over the framing in a typical roof install.
It is also very noisy in the rain.
If it needs to be replaced the insurance policy will only cover the replacement of the top layer.
They both have their pros and cons.
