A roofing contractor will know exactly how many layers of roof shingles are allowed in your area for your building but it is normal that you will be permitted up to three layers of shingles.
Roofing layers allowed florida.
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When replacement is required there will likely be an added expense in removal and disposal of the material it s not a deficiency so i just give an informational statement.
Are 2 layers of shingles allowed.
Asphalt shingles are composed of a base material which is either an organic felt of a glass fiber mat asphalt and surfacing material which is generally a mineral granule.
The code includes several specific excep tions to its roof system removal and replace.
If i choose to re roof over the existing roof covering will i still have to comply with the existing building code.
Yes provided the existing roof covering is suitable as a base for the installation of the additional roofing as stipulated by section 611 3 of the florida existing building code.
I live in seminole florida.
When it s time to replace your roof there are several factors that might lead your roofing professional to recommend adding shingles on top of your existing layers.
The requirement became effective on october 1 2007.
That limit pertains to roofs with up to a 4 12 pitch.
Asphalt shingles typically can have one more layer added over the top two roofs total.
And when the existing roof system is wet or deteriorated to the point it will not be a suitable substrate.
This law states that if more than 25 percent of a building s roof must be replaced within a 12 month period then the entire roof may need to be replaced.
Two or more layers of any exist ing roof coverings.
Most building codes allow up to two layers of organic or fiberglass asphalt shingles.
While this is acceptable under the florida building code it is the maximum number of layers allowable.
Asphalt shingles are the predominate roofing material used to roof homes in florida.
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For many years it was acceptable to put even the third layer.
On most flat roofs such as epdm tpo or modified it is perfectly acceptable to two layers of roofing.
Steep sloped roof products such as tile slate metal and shakes only allow one layer.
There are slight differences to the rule for buildings in or out of an hvhz so it is important to know where your building lies.
When you replace a roof on a home that was built before the implementation of the statewide florida building code on march 1 2002 the nailing of the roof sheathing decking must be brought up to current standards for hurricane resistance as part of the installation of the new roof.
