For many years it was acceptable to put even the third layer.
Roofing layers allowed florida.
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.
The code includes several specific excep tions to its roof system removal and replace.
Two or more layers of any exist ing roof coverings.
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.
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And when the existing roof system is wet or deteriorated to the point it will not be a suitable substrate.
Steep sloped roof products such as tile slate metal and shakes only allow one layer.
Another important florida roofing rule is the 25 percent rule.
This roofing system has two layers of material.
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.
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Most building codes allow up to two layers of organic or fiberglass asphalt shingles.
That limit pertains to roofs with up to a 4 12 pitch.
Asphalt shingles are the predominate roofing material used to roof homes in florida.
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.
The requirement became effective on october 1 2007.
On most flat roofs such as epdm tpo or modified it is perfectly acceptable to two layers of roofing.
When roof system removal is required the code stipu lates all layers of existing roof systems need to be removed down to the deck.
While this is acceptable under the florida building code it is the maximum number of layers allowable.
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.
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.
Are 2 layers of shingles allowed.
Asphalt shingles typically can have one more layer added over the top two roofs total.
