How to Properly install Valley Shingles Following HVHZ Florida Code Paradise Exteriors Roofing

OPEN VALLEYS...
1. Install GAF Leak Barrier... full 36" (914 mm) wide over entire valley length.
2. Lap Deck-Armor® or any other GAF
Roof Deck Protection 6" (152 mm)...
over the Leak Barrier.
3. Center the valley metal... Use metal
proven to last.
• 20" (508 mm) min. wide aluminum,
galvanized steel or copper. Note: Local building codes may require wider metal in open valley constructions.
• Non-corroding, non-staining metal.
• 24-gauge minimum.
4. Nail the metal on the edges... Place
nails so the nail heads hold the metal
in place.
5. Do NOT puncture the metal... Nailing
through the metal may cause leaking
and buckling due to movement. 6. Install shingles into the valley...
Cover the metal 4” (102 mm) to 12”
(305 mm) for sealing.
7. Clip the corners... to keep water flow
toward the valley center.
8. Taper valley shingles... to handle
increasing water volume.
• Start with minimum shingle separation of 6" (152 mm)... at the valley top.
• Widen shingle separation 1/8” (3 mm) per 1 foot (305 mm)... toward the eave.
9. Embed shingle ends in plastic roof cement... Seal shingles to the metal
to keep water from running under them. (Note: Excess cement can cause shingle blisters.)

CLOSED CUT VALLEYS...
1. Install GAF Leak Barrier... full 36" (914 mm) wide over entire valley length.
2. Lap Deck-Armor® or any other GAF
Roof Deck Protection 6" (152 mm)...
over the Leak Barrier.
3. Install one roof plane over the other...
with the larger roof plane over the smaller to keep large water flow over the valley cut.
4. Extend starters and first course across valley... Both right and left starter courses should extend 12" (30 mm) min. beyond the center line.
5. Fasten properly in valley...
• No nails within 6" (152 mm) of the
valley center to reduce potential
leaks.
• Double nail shingle ends in valley
to compensate for this 6" (152
mm) space.
6. Continue up the valley...
• Installing underlying shingles 12" (305 mm) min. past the valley center line.
• Leave top shingles extended past the center line to be cut later.
7. Trim shingles... 2" (51 mm) back from valley center line on top roof plain.
8. Clip shingle corners... Clip shingle cor-
ners at the valley to keep water flow to
the valley center.
9. Seal the valley... Using plastic roof
cement, seal the valley shingles to each other for the best protection. Note: Too much cement can cause shingles to blister.

WOVEN VALLEYS...
1. Install GAF Leak Barrier... full 36" (914 mm) wide over entire valley length.
2. Lap Deck-Armor® or any other GAF
Roof Deck Protection 6" (152 mm)...
over the Leak Barrier.
3. Carry both shingle courses to the valley.
4. Weave the shingles... Install one shingle over the other as you go up the valley.
5. Extend each shingle end 12" (305 mm) min... beyond the valley center.
6. Seat the shingles in the valley... Before nailing, firmly press shingles down
at valley center to conform to valley shape.
7. Do NOT nail closer than 6" (152 mm) to valley center... Due to the extreme water volume in valleys, nails near the center can leak.
8. Nail twice at shingle ends... Instead of nailing in valley center, nail twice at the ends.
9. Keep valley centered... Allowing the weave to creep up a valley side will allow water infiltration under the shingles.

Do not use woven valleys... for Timberline® Series Shingles or any laminated shingle. Use woven valley construction only with Slateline® Shingles or with 3-tab Royal Sovereign® or Marquis WeatherMax® Shingles.
• Material is too thick... Laminated shingles are too thick to conform to a valley center.
• Valleys will “bridge”... Bridging is when shingles do not sit flush to the valley sides.
• Bridging can cause leaks... Wind-driven rain can easily penetrate a bridged shingle.
• Blow-offs from bridging... Bridging puts a shingle up in the wind, where it can blow off.

Woven valleys are not acceptable in Weather Stopper® Golden Pledge® and Silver Pledge® installations, except with Slateline®, Marquis WeatherMax®, or Royal Sovereign® Shingles.

In Florida, your roof matters. Your roofing system should be able to withstand the hurricanes that can blow through the area, keeping your home safe from the elements. Fortunately, you can turn to Paradise Exteriors—the area’s best roofing contractor—when you need roof replacement services that you can trust. In addition to installing premium impact windows and doors, we also install high-grade GAF roofing systems capable of protecting your home for years to come.


1918 Corporate Dr,
Boynton Beach, FL


9741 International Cr N,
Saint Petersburg, FL


Call us at:


1 - 866 - 478 - 6891


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