Best Gravel For Retaining Wall Base

Design and build your retaining wall to slope at a minimum rate of.

Best gravel for retaining wall base.

Due to soil erosion your retaining wall should be built on a solid foundation made from paver base. 600 mm wide the length of the wall the depth of the trench will be 6 in. Choose a paver base with landscape rocks between 1 2 inch and 3 4 inch in size. Placed behind the retaining wall to promote drainage of water away from the wall.

6 10mm 20 25mm and 40 50mm. The ground s a mixture of clay and degenerated rock. I ve three options for stone size. Next compact it and level it using either a hand or mechanical compactor.

As with a concrete block wall build a firm gravel base and ensure good drainage. The stone is split at the quarry either 8 in. They weigh 40 to 100 lbs. You don t need mortar with a stone retaining wall.

Simply stack them in rows or mix heights within a row for a random look. Lay a 4 6 inch layer of the crushed base material in the trench. Wide and at several lengths and heights. Round rocks such as pea gravel rolls and dislodge under pressure resulting in failure of the retaining wall.

For lower walls 2 we put 1 minimum of gravel 6 of sand then reinforced concrete base or concrete block below grade. Similar to gravel paver base is a form of construction aggregate that contains crushed rocks such as limestone. This prevents water from building up behind the wall. 25 mm for each 1 ft 300 mm of wall height for the amount or buried block that is needed.

Crumbly sort of stuff. Retaining wall base trench dig a base trench 24 in. To keep the blocks on your retaining wall level and structurally sound you need a base layer of several inches of well compacted sharp gravel. A retaining wall must have the strength to hold back the weight of the soil plants and sometimes small structures behind it.

Fill the trench with a 2 to 3 inch layer of paver base. The leading cause of wall failure. 150 mm plus an additional 1 in. Our trenches were more like 18 24 deep or more depending on the grade and about 18 wide.

This is standard for all types of landscape walls. A level base on which the wall sits. I m putting in a retaining wall about 2m high and i m looking to backfill behind it with gravel to provide drainage. A handheld tamping tool can really help in getting the gravel level but you re right one stray stone can throw off the entire operation.