How much sand when laying block paving?
Question:
Answers:
you need a sub base of 100mm - 150mm (6") MOT type 1 hardcore and a compacted zone 2 grit sand laying depth of 50mm (2")
as a rough guide 1 ton of zone 2 grit sand at 50mm compacted will cover approx 10 square metres or 1 full pack of 200mm x 100mm blocks
hope this helps
thanks
Mick
http://www.192directory.co.uk/
6 inch scalpings then 2 inch sharp sand bed
Approximately 2ins (50mm).
Hi, I do block paving all the time at work, and this will depend on what you are using the paving for.
For normal pavement/patio you will been a subbase of at least 4inchs compacted gravel and 2inchs on sharp sand then lay your blocks and brush kiln dried sand over it to cover the joints then compact the blocks
For Driveway the industry min is 6inch subbase but i always use 8inchs covered with 2inch of sharp sand then lay blocks and compact
for 2inchs of compacted sand you will want around 1 tone per 30 square metres
50 mm course sharp
you'll be suprised at how much you need! Make sure you get plenty...
Hi, Paving Slabs,(and I'm only guessing thats what you mean by block) need to be laid on a firm,level base. But the depth of that base depends on the type of soil you have ,and what the area is going to be used for. For just patios and walkways, you'll need to remove enough vegitation and soil to allow for the depth of the block,plus enough for a 11/2 " layer of sharp sand pluss allow a extra 3/4 " so the block will set below the grass, and won't ruin your lawnmower when you mow. Compact the soil with a Garden Roller, you know the ones that look like a big barrel and you fill them with water. Spread the sand around evenly with a rake and tamp it down with a piece of a 2x6 wood. If the area is going to be for, lets say a drive,or your soil has a lot of clay or peat, lay a sub-base of firmly compacted gravel or some crushed up stone to a depth of 3 or 4 inches before you spread the sand on top to level it out. If your going to park your car on it, you need to make the sub-base a least 6 inches deep ,to support the weight. Alot of work my friend! Good luck,Bye
I am reliably informed from a colleague in the trade, that 1" (25mm) is sufficient, indeed he prefers it, when hardcore/type1mot etc, is vibrated/compacted for base underneath. He reckons it reduces the risk of sinking and wash away, which can be caused by prolonged/frequent. torrential rain etc.
enough?
More Related Questions & Answers...