Category: Firrings

Timber Firrings

Timber firrings are essential in construction projects that involve flat roofs. These specially shaped timber strips are used to create a slope, or fall, which allows water to drain off a flat roof surface. Without the appropriate slope, water can pool on the roof, leading to damage over time. By using firrings, builders can ensure effective drainage and prevent issues caused by standing water.

Why Are Firrings Important in Flat Roof Construction?

Flat roofs are a common architectural choice, particularly for extensions, conservatories, or commercial buildings, but they come with a unique set of challenges—namely, water drainage. Unlike sloped roofs, flat roofs do not naturally encourage rainwater to run off. Firrings are used to solve this problem by creating a gentle incline that leads to drainage points.

Typically, firrings are installed to create a slope gradient of around 1:40 or 1:60. This slight incline is enough to allow water to flow toward gutters or other drainage systems, preventing water from collecting on the roof. Over time, standing water can cause leaks, water damage, or even structural issues, making firrings an essential element in any flat roof design. The use of firrings provides an easy, cost-effective solution to what can otherwise be a significant long-term problem.

Common Uses for Timber Firrings

• Flat Roofs: The primary use for firrings is in flat roof construction, where they create a subtle slope to assist with water drainage.
• Extensions and Conservatories: Firrings are often used in extensions, conservatories, or other structures with flat or low-pitch roofs.
• Other Low-Slope Applications: Firrings can also be used in any project requiring a slight slope for drainage, including certain types of flooring or external decking areas.

Types of Timber Firrings Available

We have a variety of timber firrings available, depending on the slope and length required for your project:

1. 2-0 Timber Firrings

These 2-0 firrings are ideal for smaller flat roofs or projects requiring a gentle slope.

2. 3-0 Timber Firrings

For slightly larger roofs, the 3-0 timber firrings provide a steeper slope depending on the specific variant you need.

3. 4-0 Timber Firrings

For larger projects that require a more pronounced slope, 4-0 firrings offer effective drainage solutions for bigger flat roof constructions.

Choosing the Right Firrings for Your Project

Selecting the appropriate firrings for your construction project depends on the size of the roof and the level of slope required. Larger roofs typically require longer and steeper firrings to ensure efficient water drainage. In these cases, the 4-0 timber firrings may be the most suitable choice, as they provide the necessary incline for larger surfaces.

For smaller roofs or projects with less pronounced slopes, the 2-0 or 3-0 firrings will often suffice. These sizes offer adequate drainage capacity while maintaining a more subtle incline, making them perfect for smaller flat roofs or low-pitch structures.

If you’re working on a larger project that involves treated timber or battens, you can also explore our range of treated timber and treated battens to ensure your materials meet all your construction needs. These materials pair well with firrings to ensure your roofing or construction project meets the highest standards of durability and longevity.