Repairing Guides

how to repair a roof valley

by Mona Simonis DVM Published 3 years ago Updated 2 years ago
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Follow these three preparatory steps to get ready to repair roof valley leak:

  • Clear any debris in the roof valley and surrounding area.
  • Take measurements of your roof flashing – most flashing is 14 inches wide, but yours may vary .
  • Move to the highest end of the valley and work your way down, cleaning shingles from both sides of the valley whether they’re damaged or not. ...

Full Answer

How much does it cost to repair a roof valley?

Roof valley replacement costs $200 to $850, depending on the length, roof slope, type (open or closed), and the number of shingles replaced. Repairing roof valleys requires removing nearby shingles, replacing flashing, install new shingles, and re-sealing.

How to clean and refinish roof valleys?

Things You Will Need

  • Mix three parts of pure lemon juice to one part salt in your plastic bucket. ...
  • Dip your stiff non-metallic brush into your lemon and salt solution and scrub on an inconspicuous part of your roof in order to judge the effectiveness of your solution. ...
  • Rinse your clean copper roof with water from your hose. ...

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How to repair a roof leak in a valley?

There are three main types of valley flashing approaches:

  • Open valley flashing approach that makes use of sheet metal flashing and is by far the most preferred and reliable type.
  • Closed valley approach with the trimmed shingle edges on both sides of the valley. ...
  • Woven shingles valley application with shingles from both sides of the valley overlapping with each other in a woven pattern. ...

How to repair a leaky open roof valley?

  • Hammer
  • Chisel
  • Hacksaw
  • Electrical tape
  • Tape measure
  • Replacement shingles or shakes
  • Galvanized roofing nails
  • Coping saw
  • Vise
  • Nail set

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How do you fix a leak in a roof valley?

How To Repair a Leaky RoofStep 1: Inspect valley for holes all along joint. ... Step 2: Clean surface of valley with wire brush.Step 3: Cut sheet metal patch about 2 inches bigger all around than hole.Step 4: Spread thick coating of roof cement on damaged area and press patch into place, bending it to shape of valley.

Should roof valleys be sealed?

Valleys should be carefully sealed along the entire length. To help prevent water entry at these vulnerable points, install a self-sealing bituminous membrane or the equivalent along all valleys and properly integrate this membrane into the adjoining roofing materials.

How do you caulk a roof valley?

Apply a bead of roofing cement around the outer edge of the patch slide the patch under the shingles on one side and then the other. Put more roofing cement on the top and bottom of the patch where it lays over the original valley piece. Smooth the cement so water can flow uninterrupted down the valley.

How do you seal a metal roof valley?

How to Seal Metal Roof Valley. Best practices for sealing the metal roof valley vary based on the slope of the roof. Use tape sealant between the valley trim and the panel. Use fasteners to attach the panel to the structure, making sure that there is complete compression of the sealant.

What causes roof valleys to leak?

The leak is usually caused by flashing at the valley area being improperly installed or nonexistent all together. This sloppy work is usually done by inexperienced roofers or general contractors. The best way to avoid leaks all together is to hire a professional roofing contractor.

What is the best material for a roof valley?

Open Roof Valley (With Metal Lining) An open metal valley avoids the problem of meshing together shingles from two roof planes. Instead, professional roofers install a metal flashing material, ideally galvanized or painted steel, along the valley.

How do you tarp a leaking roof valley?

Allow at least 4 feet of overhang past the peak and dangle from the eaves. Attach the peak end of the tarp to a 2 x 4 with cap nails. Place the 2 x 4 against the roof so it doesn't accumulate water or dirt. The length of the board should be at least 2 feet greater than the width of the tarp.

Can flex seal stop roof leaks?

Flex Seal Spray Rubber Sealant Coating Like sealant tape products, it's best for minor roofing repairs, such as leaks and vulnerable edges, because of its small size.

How do you flash a roof valley?

0:311:37Open Valley Roof Flashing - YouTubeYouTubeStart of suggested clipEnd of suggested clipFold the top of the flashing over the ridge and nailed it off every 10 inches or so along the outerMoreFold the top of the flashing over the ridge and nailed it off every 10 inches or so along the outer edge of the flashing. Now this valley will carry water off the roof.

What is valley underlayment?

0:001:16Install Self-Adhering Underlyment in a Roof Valley - YouTubeYouTubeStart of suggested clipEnd of suggested clipSelf-adhered peel and stick underlayment is a great way to protect valleys from ice and water damageMoreSelf-adhered peel and stick underlayment is a great way to protect valleys from ice and water damage.

What is a valley cap?

The Valley Cap is made of EPDM rubber, has UV inhibitors, and comes with a 20 year weather resistant warranty. The Valley Cap is easy to install, safer to use, comes in two different sizes, and eliminates the need to force the ridge line under the primary panel.

Does GAF recommend open valley?

Open California Valleys should not be used for Golden Pledge® installations. All other shingles: ● GAF does not recommend the use of the California Valleys or any valley that does not follow the guidelines as established by ARMA or the NRCA.

What is a closed roof valley?

Closed Roof Valley In the closed valley method, the shingles are installed onto the roof. This essentially extends the asphalt shingles through the valley so the roof surface covers or closes the valley area, hence the name. The shingles completely cover the underlayment, and they become the valley lining itself.

What is valley flashing?

Valley Flashing protects the middle section where two roof sections meet, and it directs rainwater runoff away from the roof.

What is a roof valley?

Roof valleys are channels designed to drain runoff water, and like any other part of your roof, they can degrade over time with exposure to the elements. In other cases, water can become trapped under shingles which have been overlaid to create the valley trough.

How long does it take to re-roof a house?

Most re-roofing projects are completed in one day.

What sets a roofing company apart?

What Sets All Roofing Solutions Apart 1 Family-owned and operated Delaware & Pennsylvania roofing contractor. 2 Fully licensed and insured. 3 Over 20 years of experience with roofing & siding installation and repair. 4 A+ rated BBB member 5 Complimentary Extended Material warranty 6 30-year workmanship guarantee on full roof replacements 7 Lien Waiver to protect the homeowners from material liens 8 Own crew – no subcontractors! 9 Full service roofer handling all types of residential and commercial roofing, windows & siding projects. 10 Most re-roofing projects are completed in one day. 11 Because we are efficient we are able to offer very competitive prices compared to large contractors with bigger overhead. 12 Each roofing/siding projects includes a meticulously performed, post-roofing inspection. We want to make sure that your roof replacement is done correctly and that it meets your complete satisfaction. 13 The company owner supervises all projects to ensure high-quality workmanship. 14 Customer Satisfaction Guaranteed!

What is flashing on a roof?

A flashing is a transitional roofing material that connects the roof material to some other building material or to another part of the roof. And damaged flashing is behind most roof leaks.

What is all roofing solutions?

Call All Roofing Solutions, your full service roofing contractor with over 20 years of experience in roofing and re-roofing. We will work with you to identify the damage and present you with options tailored specifically to your situation. Our priority is always to provide you with great service!

How wide is a roof flashing?

Take measurements of your roof flashing – most flashing is 14 inches wide, but yours may vary .

What is the phone number for roofing in Delaware?

Call us at 302-725-7663 in Delaware or 610-551-7663 in Pennsylvania to schedule your FREE estimate. And don’t forget to ask about our discount of 15% off any roofing repair projects.

What is a roof valley?

Roof valleys are troughs that discard runoff water where two sections of sloped roof meet. The valleys on many older houses comprise layers of roofing paper, which can deteriorate over time. In other cases, shingles are overlapped to make a valley, and water from harsh rains can find a way under the shingles.

What to do with a steep roof?

On steep roofs and tile roofs, enlist a roofing contractor to inspect the roof and fix a valley.

Where to install replacement shingles?

Start at the lower end of the valley. Install replacement shingles at each side of the valley , such as composition shingles or wood shingles, that match the existing shingles. Align the lower edge of each shingle with the lower edges of the corresponding shingles on the roof.

Where to place sheet metal valley flashing?

Place the new piece of sheet-metal valley flashing in the valley with the raised center aligned with the center of the valley from top to bottom. Align the lower end of the raised center with the lower edge of the roof.

How long is valley flashing?

Valley flashing comes in standard lengths, ranging from 8 to 12 feet. For longer valleys, install the lower piece of flashing first and overlap the lower edge of the next piece 12 inches. Save time and inconvenience by carrying the tools and nails onto the roof in a 5-gallon bucket or a tool belt. Warnings.

When to start valley repair?

During warmer months, I usually start a valley repair around 7 a.m., when the shingles are cool and easy to separate. I try to unzip the valley quickly because by 9 a.m., the shingles are often too hot to separate cleanly. During cooler months, I start later (from 8:30 a.m. to 9 a.m.) to give the shingles a chance to warm enough to be pliable.

What is the third tool used for roof repair?

They also lack a tapered hatchet blade. The third tool is a roofer’s pry bar.

What happens if you have a leaky roof?

If you have a leaky roof, you'd better fix it immediately, even if it doesn't bother you much or you're getting a new roof next year. Even over a short time, small leaks can lead to big problems, such as mold, rotted framing and sheathing, destroyed insulation and damaged ceilings.

Why are there tiny holes in my roof?

Tiny holes in shingles are sneaky because they can cause rot, a leaky roof and other damage for years before you notice the obvious signs of a leak. You might find holes left over from a satellite dish or antenna mounting brackets or just about anything.

What causes water stains on roofs?

If you have water stains that extend across ceilings or run down walls, the cause is probably a leaky roof . Tracking down the leak is the hard part; the roof leak repair is usually pretty easy. We'll show you some simple tricks for finding and repairing most of the common types of leaky roofs. But if you live in the Snow Belt and in the winter you have leaks only on warm or sunny days, you probably have ice dams. We won't go into that roof leak repair in this story. Check out this article for more on preventing ice dams. If you have a leaky roof, you'd better fix it immediately, even if it doesn't bother you much or you're getting a new roof next year. Even over a short time, small leaks can lead to big problems, such as mold, rotted framing and sheathing, destroyed insulation and damaged ceilings. The flashing leak that caused an expensive repair bill was obvious from the ceiling stains for over two years. If the homeowner had dealt with it right away, the damage and subsequent repairs would have been minimal.

How to find a leak in the attic?

If you have attic access, the easiest way to track down a leak is to go up there with a flashlight and look for the evidence. There will be water stains, black marks or mold.

What to do if ceiling has a vapor barrier?

If your ceiling has a plastic vapor barrier between the drywall and the attic insulation, push the insulation aside and look for flow stains on the plastic. Often water runs to openings in the vapor barrier, such as at ceiling light fixtures.

What are vent boots?

Plumbing vent boots can be all plastic, plastic and metal, or even two-piece metal units. Check plastic bases for cracks and metal bases for broken seams. Then examine the rubber boot surrounding the pipe. That can be rotted away or torn, allowing water to work its way into the house along the pipe.

Where does water come from on a roof?

Often, wind-driven rain comes in from above the roof, especially around windows, between corner boards and siding, and through cracks and knotholes in siding. Dormer walls provide lots of spots where water can dribble down and enter the roof.

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