French Drain Depth Uk

That should be more than enough to ensure the drain can handle any moderate amount of rainfall.

French drain depth uk. Recommended depths can range from about 18 inches to 6 feet. All of your drain pipe with one exception must slope slightly downhill. The width and depth of the drain you dig will depend on the severity of the drainage problem and the digging tool you re using. Trenching tools will cut wider trenches which is ideal for more severe drainage issues and will cut the digging time in half.

In this french drain tips video i cover some common mistakes made when installing drainage lines for gutter downspouts. This low level distribution pipe will have no outfall. However most standard french drains are approximately 6 wide and 18 to 24 deep. Usually 1 8 per foot is plenty for drainage this is the same as the commonly recommended 1 slope.

Note that i said the drain pipe must be sloped rather than the french drain. When it comes to working out the best size for your french drain there is usually no need to make it larger than around two feet deep and one and a half feet across. There is no hard and fast rule regarding the depth of a french drain. These french drains often also include a lower level perforated pipe to distribute the water along the length of the french drain trench.

Often when installing new drainage sy. When installing a french drain next to a structure the trench must go no lower than the lowest foundations. However some situations may require trenches several feet deep and several feet wide. About 8 inches to 2 feet deep should be sufficient for many water diverting projects though related systems such as those built around foundations and sub ground living spaces as well as the bases of retaining walls may be deeper.

Traditionally the most common are up to 6 inches wide and 12 inches in depth.