Overlap metal roof valley sections by 12 inches and seal the lap with a flexible sealant such as polyurethane or butyl on roofs shallower than 5 12.
Florida roof valley lining requirements.
There are laws regarding who can work on roofs how roofs must be installed or repaired when roofs may be reroofed and much more.
When deciding how to shingle a roof valley you will need to consider your materials the climate and the desired look of the roof.
For open valleys valley lining exposed lined with metal the valley lining shall be at least 16 inches 406 mm wide and of any of the corrosion resistant metals in table r903 2 1.
For open valleys valley lining exposed lined with metal the valley lining shall be at least 24 inches 610 mm wide and of any of the corrosion resistant metals in table r905 2 8 2.
Roof repairs to existing roofs and roof coverings shall comply with the provisions of this code.
Closed valleys protect the roof lining from abrasion that water run off would cause and are therefore quite durable options.
For open valleys valley lining of two plies of mineral surfaced roll roofing complying with astm d 3909 or astm d 6380 class m shall be permitted.
For open valleys valley lining exposed lined with metal the valley lining shall be not less than 16 inches 406 mm wide and of any of the corrosion resistant metals in table r903 2 1.
Pursuant to section 455 275 1 florida statutes effective october 1 2012 licensees licensed under chapter 455 f s.
The three methods to shingle a roof valley.
Most of these laws are found in the sixth edition of the florida building code which went into effect on dec.
This recommendation includes iko s premium shingles.
For open valleys valley lining of two plies of mineral surfaced roll roofing complying with astm d3909 or astm d6380 class m shall be permitted.
If you have any questions please contact 850 487 1395.
The main advantage of closed valleys is that they protect the roof from snow and ice build up however in florida this is not an issue that needs to be considered.
Where two roof valleys meet for example above a gable dormer a soldered joint is likely to break from the movement.
Must provide the department with an email address if they have one.
Florida has more roofing regulations than you may realize.
You can see in our roof valley photo left that there has been a history of.
Chapter 15 of the florida building code building or chapter 9 of the florida building code residential.
Iko recommends that you install architectural shingles with the open valley method for the best roof performance.
Open valleys are excellent for preventing moisture from.
The installation requirements for new asphalt shingle roofing systems is found within the florida building code building edition chapter 15.
For open valleys valley lining exposed lined with metal the valley lining shall be at least 16 inches 406 mm wide and of any of the corrosion resistant metals in table 1503 2.
