What are the different types of closed roof valleys?
Because of installation expenses and our attraction towards aesthetic structures, we have two common types of closed roof valley: Woven Valleys - The shingles are installed in a traditional sense, i.e., where the two sloping planes meet, the shingles are then interlaced or woven such that the seam matches the contours on the roof.
How can I avoid Valley problems on my roof?
Make sure your roofers install your roofing system properly to avoid these valley problems. Your roofing system has a closed valley when shingles on one or both sides of the roof extend across the valley on the adjacent roof slope. The linings of a closed valley are not exposed to weather or impact because they’re protected by shingles.
What is a poorly cut valley in a roof?
A poorly cut valley is a quality issue on installation rather than a defect, so refrain from having roof replacement if you don’t see any leakage. This is a type of closed valley where your roofing system has shingles from both roof slopes run through the adjacent slope, alternating each course.
What are the most common valley lined shingle roofing problems?
You may encounter defective valley lined shingles installation, failed roll-roofing valley liners, or a cross wash where water running down a roof slope flows across the valley and up beneath the shingles on the adjacent slope. Make sure your roofers install your roofing system properly to avoid these valley problems.
What are the different types of roof valleys?
So, your choice of roof valley installation method is critical to maintain your warranty and get the best longevity from your roof. There are three main types of roof valleys: woven roof valley, closed roof valley and open roof valley. There's also a subtype of open metal valley, called a California valley.
What are the 3 different applications techniques used when applying asphalt shingles to a valley of a sloped roof?
The Three Methods to Shingle a Roof ValleyWoven Valley Shingle Installation. To achieve a woven valley installation, a roofing professional lays shingles in the valley and weaves them together. ... Closed-Cut Shingle Valley Installation. ... Open Valley Shingle Installation.
What is the most common type of asphalt shingle?
dimensionalAn asphalt roof has 3 different shingle options to choose from. These three types of asphalt shingles are 3-tab, dimensional, and luxury. While 3-tab used to dominate the market, dimensional shingles are the most common type installed on roofs today.
What is the best way to shingle a valley?
1:406:15"Roof Installation: How To Shingle a Valley (HD)" by RoofRepair101YouTubeStart of suggested clipEnd of suggested clipPress the shingles into the valley. And nail them in place. Make sure that you press the shinglesMorePress the shingles into the valley. And nail them in place. Make sure that you press the shingles far enough into the valley to prevent bridging.
What is a California valley in roofing?
California-Cut Valley It's sometimes called a “California-cut” valley. With the California-cut valley, shingles from the smaller roof slope are installed across the valley onto the adjacent slope. A valley shingle is then installed parallel to the centerline and offset a couple of inches.
How do you shingle a 3 tab shingle roof?
4:427:573-Tab Roofing Shingles (Ultimate Guide and Review) - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo they have to be installed perfectly. For the roof to look good. And so that's one reason that theMoreSo they have to be installed perfectly. For the roof to look good. And so that's one reason that the crews like to use architectural shingles instead of three tap for the installation.
What are 5 common roofing systems?
We can work with the six most common roof classifications, including:Built-Up Roofing (BUR) Membrane.Metal Roofing.Modified Bitumen Roofing.Thermoset (EPDM) Roof Membrane.Thermoplastic (PVC & TPO) Roof Membrane.Garden “Green” Roofing System.
What are the most common roof types?
Here are the most common types of roofing:Asphalt shingles. “The most common residential roofing material used in the United States, asphalt shingles are popular because they are economical and easy to install,” states HGTV. ... Ceramic roofing tiles. ... Slate roof shingles. ... Wood shakes and cedar shingles. ... Metal roofing.
What are some of common roof types?
Some of the common roof types are as follows ;Saltbox Roofs.Mansard Roofs.Gambrel Roofs.Pyramid Roofs.Hip Roofs.Cross Gabled Roofs.Flat Roofs.Bonnet Roofs.More items...•
What is the best type of roof valley?
Which Roof Valley Type is Best? Most roofing contractors agree that the open roof valley is superior. However, there are cases where a closed roof valley is the preferred method of installation.
How do you form a valley on a roof?
3:5121:55Making and fitting valley rafters The Big Build 30 - YouTubeYouTubeStart of suggested clipEnd of suggested clipIf you raise up your valley rafter like this especially if you're using a thick member. And you putMoreIf you raise up your valley rafter like this especially if you're using a thick member. And you put your battening on on the roof it rides up and it all goes a little bit out of shape.
How do you put a valley on a roof?
0:3719:02How To Install Roof Valley - YouTubeYouTubeStart of suggested clipEnd of suggested clipBut the most important thing is here is we have our starter strip in place so you can see here we'reMoreBut the most important thing is here is we have our starter strip in place so you can see here we're coming out of a wall shingles are already installed then we have to tie into our valley. This is a
What are the different types of roof valleys?
There are three main types of roof valleys: woven roof valley, closed roof valley and open roof valley. There’s also a subtype of open metal valley, called a California valley. Each type has its own benefits and drawbacks.
What is a roof valley?
All other valley types are not covered by IKO’s limited warranty. A roof valley is a spot where two roof surfaces meet. Each roof plane has a layer of shingles that need to smoothly intersect at the valley, even though they are laid at slightly different angles.
What is the best material for flashing a roof?
Aluminum: While aluminum flashing does not last as long as other flashing materials, it is cost-effective and flexible enough to get the job done. Copper: Copper is a beautiful, traditional roofing material that is also used in flashing other roof components. In an open metal valley, copper will develop a patina.
What is an open metal valley?
Instead, professional roofers install a metal flashing material, ideally galvanized or painted steel, along the valley. They apply the shingles after the flashing and cut the shingles back on both sides so that a portion of the metal remains exposed.
Why do roofers nail in the valley?
They also perform better because they don’t require as much nailing in the valley. Instead, roofers should nail only at the edges of the flashing, which is far enough from the center of the valley to be safe. Most homeowners also find that they like the look of open metal valleys because they define each roof plane.
How are shingles woven together?
In a woven valley, shingles are woven together through the valley. The roofing professional installs shingles on both planes at once. When they reach the valley, they weave the shingles from each plane together, without having to cut them.
How to tell if a roof is closed cut?
You can identify a closed-cut roof valley by the straight line of cut shingles running down the approximate middle of the valley. To get this look, a roofing professional installs the shingles on one roof plane first. They stop roughly 12 inches past the center of the valley. Then, they install the shingles on the second plane, allowing them to overlap the first layer. Finally, they cut the second layer of shingles in a straight line two inches from the center of the valley. As a result of this installation method, the top layer of shingles overlaps the bottom by a few inches.
What is an open valley roof?
Open Valley. Open valleys are lined, preferably with metal instead of roll roofing, with will fail and long before metal fails from corrosion. Shingles should be sealed at their edges along the valley. Roll roof lining that has failed and leaks.
Where are shingles cut on a second slope?
Once those shingles are in place, their edges closest to the valley form the starting point for installing shingle courses on the second slope. Shingles at each course are started at the valley and cut at edge of the roof.
How does a roofer work on a second slope?
2. On the second slope, The roofer starts at the roof edge and works toward the valley, allowing the last shingle in each course to extend across the valley onto shingles on the opposite slope . 3. Once the slope is covered with shingles, the roofer snaps a line parallel to the valley centerline and cuts off the excess.
Why are California cut valleys so popular?
California Cut valleys are popular with roofers because they are quick and easy to install. They are less popular with- are not recommended by- shingle manufacturers, but they typically perform adequately and should not be called out as a defective installation type.
Can you use dimensional shingles on a California cut valley?
They are acceptable with dimensional shingles only, not 3-tab. California Cut valleys are installed in the following manner: Shingles on one slope are allowed to cross over onto the adjacent slope. Starting at the base of the valley, a row of shingles is then installed (end to end) up the roof parallel to the centerline of the valley.
How to make a closed valley roof?
Here's how a closed roof valley is created. Line the center of the valley with a row of impervious ice and water shield. ( width can vary) Place roof underlayment lining. While closed valleys don’t need metal flashing, it’s good practice to place a couple of layers of roll roofing before laying the shingles.
What metal is used in roofs with open valleys?
Open Valleys. Roofs that feature open valleys use "V" or "W" shaped metal pieces at the center of the valley. The sloping roof planes then stop some inches short of this centerline, leaving the valley open. The V or W shaped metal pieces used as centerlines could be Galvanized, Copper, Aluminum, Zinc Alloy, or Steel coated.
What is woven valley roofing?
Woven Valleys - The shingles are installed in a traditional sense, i.e., where the two sloping planes meet, the shingles are then interlaced or woven such that the seam matches the contours on the roof. The shingles are just snuggled into the valley avoiding the use of nails within 6-inches of the valley center.
What is a cut valley roof?
Cut Valley - This is a closed roofing valley style that is used to give the roof a cleaner, sharper appearance. It's very practical where one roof slope is steeper than the other.
Why do shingles wear down?
Shingles wear down due to snow, ice, wind, and rainwater. Open metal valleys age well with the rest of the roof and will stand the test of time. Various choices of flashing material – You can go for the dramatic look using contrasting colors or paint the flashing to match the shingles!
What is a roof valley?
A roof valley is a channel created where a roof changes direction or angles. Usually, a “V” or “W” shaped metal piece is placed in the valley to channel water off your roof. Roof valleys are very important for a "roofing system" to work correctly and must be done right and taken care of to keep them in good condition.
What does it mean when a roof slopes to the valley?
Remember: Your roof slopes to the valleys, meaning all of the water accumulates in the valley like a small river. This large volume of fast moving water can wear shingles down much faster than the "field shingles" that make up the majority of your roof.
What Is the Purpose of a Valley on a Roof?
Ultimately, the main function of a roof valley is to guide water flow from the roof into valley troughs that then carry water and debris to the edges of your roof. Without these valleys, your roof would become puddled with water, leaves, dirt and other debris, creating potential safety hazards and damage to your home.
What Are the Different Types of Roof Valleys?
There are three main types of roof valleys — cut, weaved and exposed metal. The types differ in various ways, but there are a few central characteristics that set each design apart.
How to identify dimensional shingles?
You can identify dimensional shingles by their unique look. Unlike 3-tab shingles, these shingles are not cut into identical shapes. Instead, each shingle is manufactured with alternating areas or tabs of single and double layers. This shingle pattern is often referred to as “dragon’s teeth.”.
What is composition shingles?
Composition is a general term for shingles that are made of more than one material. Slate shingles are not composition shingles, as they are made of a single material, slate. Technically, all modern asphalt shingles are composition shingles. Modern shingles are made of fiberglass that’s covered by asphalt and granules.
What are shingles made of?
Modern shingles are made of fiberglass that’s covered by asphalt and granules. Many years ago, manufacturers produced another composition shingle made of asphalt and cellulose (a plant-based material). However, these are no longer made. All of the types of shingles we’ll talk about below are fiberglass shingles. 1.
What is a 3 tab shingle?
Three are laminate shingles, and one is a 3-tab shingle. These asphalt shingle types also have some synonyms that overlap and other synonyms that are unique to just one type. For example, traditional shingles, architectural shingles, premium shingles and performance shingles may all be called fiberglass shingles.
What is premium shingles?
Premium shingles are also called designer shingles. They share the two-layer composition of laminate shingles, but they have other features that create a premium look. Many premium shingles are made to mimic the look of other roofing materials, such as cedar shakes and slate tiles. Roofing manufacturers wanted to offer homeowners these unique looks, without the high cost and other drawbacks of these more traditional roof materials.
What is the problem with algae on roofs?
Algae Resistance. In many areas of North America, algae growth on rooftops is a problem. When it dies off, blue-green algae leaves behind black stains on the roof. Many asphalt shingles now offer algae-resistant granules to reduce the risk of blue-green algae growth on your roof.
What is performance shingles?
Many roof shingles may qualify as performance shingles. These are simply shingles that have been designed to offer specific performance benefits, such as wind resistance, hail resistance or solar reflectivity. These features may be available in other types of shingles as well.
Builder Mike Guertin shows three conventional ways and one newer method for weatherproofing this crucial roof detail
Synopsis: This article illustrates four different methods of shingling a valley, comparing the advantages and disadvantages of woven, open metal, closed cut, and Long Island valleys and describing the author’s techniques for preparing and installing each one.
Preparing a roof: All valleys start the same
Regardless of the shingling method, every successful valley installation begins with proper roof preparation.