Can you lay paving slabs on building sand?
Can You Lay Paving Slabs on Building Sand? The answer is NO because building sand is too soft. You may find it combined with concrete but even that mixture isn’t strong enough to hold paving slabs in place. So, if you want to avoid patio demolition, don’t replace sharp sand with building sand.
How long will Indian sandstone last?
Indian sandstone paving can have a very long lifespan if installed and maintained properly. With a cheap installer and poor care you can expect 2 – 10 years from your paving. With a solid base and repointing every few years you can in theory get 30 – 50 years from your paving or perhaps more.
Does Indian sandstone need sealing before laying?
But what is the correct answer – and do you actually need to seal your stone? The short answer: No. The long answer: Natural stone has survived for 1000’s of years without any chemical treatments, so it’s unlikely to fall to pieces without a layer of sealant that some suppliers insist it needs.
Can you lay Indian sandstone on a dry mix?
There is much discussion on this subject but the short answer has to be no. Laying sandstone paving should only be done with a full wet bed of Mortar at a ratio of 5.1 sand and cement and the slabs should be primed individually before laying using a slurry primer to aid with adhesion and to prevent salt blooms.
How thick should mortar be under slabs?
Add a mortar bed
The mortar should be damp, not runny. Spread it out and level it with a trowel. The mortar bed needs to be 30-40mm thick and should enable the slabs, when positioned, to sit 6-10mm high.
Can you lay 20mm pavers on sand?
If you are laying over a sand or flexible base, then you must use a 20mm or 30mm paver (or thicker), depending on the product.
Can I use building sand instead of sharp sand?
“It should be sharp sand but a lot of hard landscapers use a mixture of both. Building is great for ease of laying the slabs and the moisture will give good grip to the slab, but, it breaks down faster over time.
Should I use sharp sand or builders sand?
Differences between sharp sand and building sand
Having a larger grain size means sharp sand is slightly heavier, giving the mortar more strength yet making it less flexible to work with. Most people use sharp sand over builders sand for floor screeds, fine concrete work and laying paving courses.