Types of roof valleys- 3-Main categories- Fix the best

What is a valley?

Valleys are a V-shaped channel in which two sides of the roof come together at a slope, creating an internal angle of lower than 180 degrees. Roof valleys are among the most prevalent roof regions vulnerable to leaks due to the volume of water that runs through them. Rooftops play a crucial role in the harvesting of rainwater to get fresh water because of the rapid depletion of water sources that are potable. So, different types of roof valleys are discussed here.

Types of roof valleys
Roof valley building

To ensure a properly functioning gutter system, ice and water must be placed beneath a flashing made of metal that is installed underneath the shingles. The roof’s valley is essential to reduce the chance of damage resulting from prolonged exposure to water. Also, roof valleys play a significant role in rainwater harvesting.

Types of roof valley

What type of material should be used in each kind of valley roof based on the needs? Valleys are especially vulnerable to water infiltration because of the amount of water that flows through them and the valley’s low slope across valley lines. 

The roof that collapses due to the inadvertent design on the roof of the valley can result in huge financial loss. Alternatives are extremely popular and expensive. Experts say that 7 percent of homeowners are renovating their homes each year.

When you build a home there are a variety of options. Each house is unique and requires different valleys. Make sure that your home and roof are secured by the most effective roof gutter. When you decide how to clean your valley roof, you have to think about the material, climate , and appearance of your roof. Types of roof valleys are:

  • Open roof valley
  • Closed roof valley
  • Woven roof valley


Metal flashing can be used to provide the security of open valleys. Some homeowners do not like the appearance of valleys that are open because the flashing is not sealed and the roof is covered with metallic stripes visible in the valley. After polishing, the shingles are installed and after that the roof is cut off on both sides to ensure that a part of the metal is visible.

Types of roof valleys
Open roof valley

Laminated shingles are usually preferable for open valley installation. Open metal valleys are more costly than other forms of installation because of the necessity to choose buy, then bring in flashing material, and then lay chalk lines then cut the flashing to make sure the flashing is secure and cut many shingles.

Valley flashing options for an open roof valley Installation

An open valley of metal eliminates the issue of joining shingles between two roof levels. For an open valley you must select the flashing material. It is likely that the flashing material is metal. It is possible to happen:

Steel Flashing: Steel has to be free of rust, such as zinc steel, galvanized steel, as well as stainless steel. Tin and lead coatings provide better effectiveness. It’s malleable and visually appealing.

Aluminum flashing: Aluminum flashing is a great choice together with slates and tiles. It offers a clean, easy, maintenance-free, lightweight and totally weatherproof roof, but it is not long-lasting. It’s extremely flexible and reasonably priced.

Copper flashing: Flashing of copper is extremely durable and lasts for a long time. To serve as a valley, it is a good choice for high-yielding copper, or cold-rolled copper. Copper is malleable however as it gets older, it develops an aged patina. Copper is a fantastic option in a roof with an open valley due to its stunning hue.

California roof valley

It’s a type of open roof valley. It has a metallic luster in the middle. Roofers apply the flashings first, before installing the shingles in the middle. There is no requirement to trim the shingles, which is a more efficient roofing method. However, it doesn’t work effectively. California Open Metal Valley is inexpensive.

Bright sides of open roof valley

  • It will be well preserved over time
  • Metal is able to quickly shed ice and water.
  •  Reduce the chance of ice dams or debris obstructions. There is less possibility of failure. 
  • There is no danger of losing its integrity in flowing water. Nailing is only needed to secure those edges.
  •  It can be utilized to fill in the gap between the edges of the roof. 
  • Fast repair and replacement

Dark sides

  • A bit expensive.
  • Less visually pleasing.


Closed valleys are lined with roof shingles, or any other material for roofing. It’s easy to put up and offers a more polished and attractive appearance. In the process of constructing the roof, it’s first shielded from water and ice. After that, the shingles get placed on both levels, securing 12 inches from the middle in the valley. Cut Valley is not the ideal choice since the shingles that are laminated do not fit properly under the next level of the shingles.

Types of roof valleys
Closed roof valley

Bright Sides of closed roof valley

  •  It’s visually appealing
  • Easy to install.
  • Cost-effective

Dark sides 

  • It is likely to have a shorter life span
  • You will need to take off any shingles that have been left over.
  •  The roof will break because of the heavy rain that flows through it. 
  • Ceilings of premium quality are not able to be installed with closed assemblies.


The shingles of this valley are arranged in alternate slopes that run across the valley. This means that they are woven together. Put a nailing 6 inches from the middle of the valley. The placement of the weave precisely at the center of the valley can be difficult and can show gaps if done incorrectly.

Types of roof valleys
Woven type roof valley

Bright sides of woven roof valley

  • Create a consistent view
  • Inexpensive option
  • Beautiful view of the roof’s level,

Dark sides

  • Higher risk of leakage or water intrusion
  • Greater chance of shingles failing
  • Ineffective performance.
  • It is not suitable for cold climates.
  •  It is difficult to repair as the roof needs to be dismantled in several pieces and repaired.

Maintenance of roof valley

The typical life span of roof valleys can be between 45 and 50 years. However, it won’t last that long if it’s not maintained in a clean form. To maximize the operation of the valleys, a long duration of life and high flow are required to be checked on a regular basis.

  • Every year, take a look at the valley drains, roofing hatchet roofing flashings made of sheet metal, roof sheathings and cover-ups for protection.
  • Make sure to clean the gutters each year. 
  • Clean and inspect the pipes at the bottom to ensure they’re free of obstructions so that water is able to flow freely. 
  • Clean the ceiling’s surface and take out leaves and small pieces of clunky material underneath the tiles. 
  • Take a look at the edges of the lips and gently tap it using the Hammer. When the lips’ edges appear getting frayed or aging, you should consider alternative options.


The roof is the primary element of a house, so it is important to choose the right roof in accordance with the climate conditions in the roof area. Here was a short discussion of roof valleys in the previous paragraphs. It is the homeowner’s decision regarding aesthetics or the style he prefers, but it is advised to pick open roof valleys that have metal flashing.

Author: Mahvish ShamimHi, I am Mahvish Shamim. A chemist, and content writer. I love working with WordPress and doing it the right way. Also passionate about spreading awareness about the environmental crisis. Through my skills, I will deliver high-quality work.

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