Minimum Roof Pitch Uk

The way pitch also known as roof slope is measured is rise over run.

Minimum roof pitch uk.

Anything above that will require you to put out higher cost because they are already considered as higher pitch. In the uk the typical house has a pitch between 40 50 although 45 should be avoided. A ratio is the most common way of expressing roof pitch or roof slope but degrees are also possible. The minimum pitch is typically 3 12 meaning the roof should rise 3 inches for every 12 inches of horizontal foot.

Deciding on the correct roof pitch for your home very much depends on the style of house you are building or renovating and to a lesser extent your local area. The minimum pitch for each product can be found in the table below and in the product brochure or within the products pages. However you can only use this pitch with built up roofing or specialized synthetic roofing. The standard of lower pitch actually ranges between 1 12 to 5 12.

Choosing the right pitch. Traditionally a minimum roof pitch of 20 was recommended in bs 5534 but modern tiles and slates have now been designed for applications as low as 15. In the usa the range of standard pitches is anywhere between 4 12 and 9 12. Some tiles and slates incorporate design features allowing them to be laid at a low minimum pitch.

Low pitches are often found on extensions to properties where the angle of the roof is limited due to obstructions such as. As aforementioned there is no standard pitch of a roof. With regards to the pitch the building standard code bs 5534 recommends a minimum pitch of 200 for slate roofs. But since there is still a wide variety of slate roofing systems there are occasions when the minimum pitch can go down to as low as 15 0 depending on the uniqueness of the roof.

It is uncommon to find a roof below 15 but for those very low pitch applications there are interlocking clay pantiles available suitable for use down to 12 5. You write the pitch assuming a run of 12 inches thus the ratio would describe how much a roof rises for each foot of the run. So if your roof rises 4 inches for every 12 inches of horizontal length then the pitch of your roof is expressed as 4 12. Roof pitch varies depending on culture climate style and available materials.

But the most commonly used pitches range between 4 12 and 9 12. How do you calculate the slope of a roof. Contemporary houses often have flat roofs which shouldn t be completely flat but should be around 1 40. Higher exposure or different sized slates necessitated a greater roof pitch of 22 5 or more.

There is no standard universal roof pitch. 35 is considered to be the minimum for slate and clay but if you do need to go below this interlocking concrete tiles are the best option. Conventional low pitch slate roofs are recommended down to a minimum of 20 in areas of sheltered or moderate exposure providing a 500x300mm slate is used and a headlap of 115mm.