Sawn Timber Firrings are used to create a fall on a flat roof system. Typically these would be nailed onto a roof joist to create a sloped roof. Despite its name, a flat roof (at least according to building regulations) should have a slight slope to reduce "ponding" or pooling of water on the roof.
Flat Roof Firrings are typically cut to order, according to the specifications required for the job at hand. Our Flat Roof Firrings are cut to specification and can be made in a variety of heights and lengths. Typically these would fall under standard heights of 50mm, 100mm and 150mm depending on the size of the roof. We can offer sizes outside of these measurements, both larger and smaller based on your requirements.
Most DIY'ers and general building work usually would be using firring that runs to 0mm. A "to 0mm" flat roof firring would run from a specified height at one end down to 0mm at the other. For example, 50mm to 0mm.
Alternative options would be to cut a firring directly into a roof joist, creating a single piece joist with built in slope. This is only recommended for professional users, where the supports are known to be perfectly level, and the joist has been specified as suitable by a qualified engineer.
Our staff cannot, and will not, advise on building regulations surrounding the firrings. All information provided online or in person is guidance only based on publicly available information surrounding building regulations. The information is not fact checked, and is not regularly updated inline with current building regulations. Information provided is for guidance only. Where reference to building regulations or to BS6229 is made, this is based on reference material freely available and may not be the most up to date revision. For the latest regulations and guidelines, you should always check with the relevant government department or professional body.
Due to the vast number of variables that can affect the final design, Our staff members will not be able to verify if the firring you select would be suitable to meet the latest building regulations. We provide any information as guidance only and is taken from publicly available information from general UK building regulations. Should your project require building regulations inspection, we highly recommend you speak with a trade professional with up to date information.
You can order your firrings online here: https://timberonline.co.uk/products/sawn-timber-firrings.html
All timber firrings will be on a strict minimum lead time of 24 hours from ordering. During busier periods, this lead time may increase.