WebDifferent-sized gravel is available: fine grades are 10mm or less, chunkier types are 20mm or more. Medium-grade gravels, particularly if angular in shape, are easier to walk on than smaller grades, rounded pea shingle or large cobbles. If cats frequent the garden, larger grades will deter unwanted activities WebA 4- to 6-inch layer of compacted pea gravel can support a patio surface under normal wear and tear. The small size of pea gravel rocks prevents large air pockets, which reduces the possibility of frost heave damage. The rounded shapes leave narrow gaps, providing multiple paths for underground moisture to escape from beneath the surface.

Can You Use Pea Gravel Under a Patio? Hunker

WebThe pea shingle is the french drain. What your other builder is suggesting with the underground pipe sounds like a land drain. This is a perforated pipe which is laid underground and is designed to catch the ground water and divert it down the pipe which can then be connected into an existing drain. It's flexible so going around corners wouldn ... brian kelly possilpark

Gravel - Wikipedia

WebUnderground drainage is usually laid in a trench that has been lined with a bed of pea shingle. The installation must be laid to the correct fall and should always follow the basic drainage design principle that all points in the drainage system should be accessible for testing, inspecting and cleaning. It is always a good idea to plan all ... Web20mm–40mm gravel and shingle. This gravel has a mix of smaller and larger stones with different shapes, sizes and colours. It is washed to remove fine particles. This naturally … WebTarmac 10mm Gravel Pea Shingle - Jumbo Bag. Product code: 131897. £71.25. Make 3 payments of £23.75. Learn more. 18+, T&C apply, Credit subject to status. Currently in … brian kennalley