Why You May Need Roof Gullies and Valleys Repair - My Trusted Expert (2024)

FAQs

Why You May Need Roof Gullies and Valleys Repair - My Trusted Expert? ›

Accumulation of Debris

A roof valley is when two roof facets meet at a slope to form an interior angle. The main purpose of roof valleys is to allow water to flow down your roof properly. There are two common types of roof valleys, open and closed. The names of the valleys pretty much tell you exactly what they are.

Like gutters, a gully is where water goes to drain away. It is also a place that can get blocked with ice, snow, autumn leaves, and other debris.

The lifespan of a roof valley is pretty impressive. In fact, roof valleys can last for up to 20 years, but unfortunately certain external factors can cut that short. You may not believe it, but the leading contributor to a leaking roof is leaves.

The roof valley is a challenging part of the roof to install. The water from both roof planes is channeled into the valley, so it carries the most water. Therefore, the roof valley will see the most wear and is the second most likely spot on a roof to develop a leak.

In an open valley, shingles are installed to cover part of the valley before being cut out of the valley area, leaving the metal surface showing and open to the elements. The metal can be stainless steel, galvanized steel, copper, or aluminum.

Common Causes of Roof Valley Leaks in Heavy Rain UK

One of the most common causes of moisture ingress and water damage in roof valleys is deterioration and failure of the valley pointing material. As valley pointing expands and contracts from weather exposure, it can become loosened or cracked.

A roof valley is the V-shaped metal channel where two roof slopes meet. It's like the intersection of architectural prowess and functionality. Think of it as the unsung hero of your roof that prevents water from finding its way inside.

Do roof valleys need to be sealed? ›

Valleys are among the most vulnerable areas for water intrusion. How? Valleys should be sealed along their entire length.

While this might seem like a pricey roof, it's worth understanding that, with proper maintenance, you won't have to replace the roof within your lifetime. Slate roofs are the longest-lasting type of roofing material, as they can last one hundred years or more.

“Manufacturer specifications suggest that asphalt shingles last 20-30 years, wood shingles 20-50 years, metal roofing 40-70 years, and tile or concrete roofs over 50 years, with steeper slopes generally prolonging lifespan,” says Steckel.

You can patch small holes with the same type of sheet metal valley is made of. Most valleys use either aluminum or copper. Using different metal to patch valley will cause corrosion.

Install A Quality Ice And Water Shield

An ice and water membrane is an effective solution to fix a dead roof valley. If you are not aware of what an ice and water membrane is, it is a type of peel-and-stick roofing underlayment that helps protect your roof from the effects of ice dam formation and strong winds.

Looking above the leak in the ceiling is a good start, but you'll also want to check near common areas where water may gather in the roof, such as corners, where roof joints meet or near roof features, like skylights, valleys and chimneys. Use Light to Your Advantage.

Fibreglass Valleys

Shop our trade quality valley troughs to provide drainage channels for inclined roof valleys. GRP valleys are a great choice for refurbishing an existing roof or for new-build properties, and are expected to last at least 30 years.