How long do paving slabs take to set?

Asked By: Melito Mkrtumov | Last Updated: 28th May, 2020
Category: home and garden landscaping
4/5 (777 Views . 23 Votes)
LAYING THE SLABS
Keep adding the slabs and ensure there's a gap of about 8 to 10mm between each stone. Don't walk on the slabs once they're laid – you need to wait for the concrete to set, which should take around 24 hours.

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In respect to this, how long before you can walk on paving slabs?

24-48 hours

One may also ask, should I leave a gap between paving slabs? I'd recommend a 10mm gap between slabs. As for leaving a gap - it all depends on the edge style of the slabs. If they have an edge designed to mimic a natural stone product (uneven) then you'll need to go with the pointed gap.

Keeping this in consideration, how long does a patio take to set?

The concrete patio slab will take five to seven days to cure. During this period, the slab must be kept wet at all times with garden sprinklers or a garden hose. It must never allow it to dry out all the way during the curing period.

How many slabs should be laid in a day?

I can lay about 25 square metres of random lay rough cut slabs a day. Anything over 20 is a good speed. /Obviously it all depends on how accurate your base is and the quality of slabs.

35 Related Question Answers Found

Is it OK if it rains after pouring concrete?

Pouring Concrete vs Pouring Rain. If the rain occurs when the concrete is fresh (about 2-4 hours after mixing), the surface should be protected from the rain. If the finishing process was recently completed, rainwater may not cause damage as long as it is not worked into the surface and the slab is left untouched.

Can you lay paving in rain?

Rain stops play - damp sand won't brush! Flags, setts, cobbles, block paving and loose aggregates can be laid during damp weather as long as the laying course, whether it is a cementitious material (mortar or concrete) or an unbound aggregate (sand, grit, whin dust) is not overly wet.

What do you lay paving slabs on?

How to lay the first paving slab
  1. Paving slabs are bedded in a mortar mix with four parts sharp sand to one part cement.
  2. Starting in one corner of the sub-base area (at the highest point), lay about 60mm of mortar on top of the sub-base.
  3. Carefully lift the first slab and lay it on top of the mortar.

Can you lay paving slabs on top of paving slabs?

Any type of paver is appropriate for use when covering up an old patio, as long as the stones fit together and create a tight surface. This includes flagstone, brick or natural paver stones; however, if you plan to use mortar, bricks should not be used if the existing surface is asphalt.

How much block paving can be laid in a day?


The whole cycle should take somewhere around 10-15 seconds, giving a laying rate of around 5m² per minute, which allowing for the usual site hassles and interruptions, should average around 100m² per hour on an open site.

How do you lay a patio for beginners?

Here's how to lay a patio in 6 easy steps.
  1. Dig 150mm into your patio area.
  2. Lay a compacted sub-base of 100mm.
  3. Cover the area with 40mm of concrete mix.
  4. Lay paving slabs 15mm into the concrete with a 10-15mm gap.
  5. Leave to set for at least 24 hours.
  6. Fill the gaps between the paving slabs with concrete mix.

Why are my paving slabs moving?

Loose or moving paving may need to be re-bedded, but it is more important to rectify the cause of the movement. Settlement and/or subsidence of the substrate layers, ie, sub-grade, sub-base and bedding layer, is the most common reason for pavement failure.

When should I start watering my concrete?

Be sure to start watering the concrete in the morning and keep watering throughout the hottest part of the day. Do not start watering during the hottest part of the day because it could shock the concrete into developing surface crazing (similar to a hot glass breaking when filled with cold water).

Is laying a patio difficult?

Lay a patio now and you'll enjoy the benefits each time you're out in the garden. It's not a difficult job, so put aside a weekend and you'll soon be entertaining friends, or enjoying a well-earned rest on your new patio surrounded by pots and plants.

Why is my concrete turning white?


Efflorescence is a chalky white salt residue that can occur with any product containing cement. As moisture migrates up to the surface of the concrete, it carries along with it calcium salts from within the concrete. When the salts reach the surface, they react with CO2 in the air and form insoluble calcium carbonate.

How long before you can put weight on concrete?

Although concrete will harden soon after pouring, it's still susceptible to damage from weight during the first four weeks. Wait at least 24 hours before allowing foot traffic, including pets, on a newly poured sidewalk or slab, and don't drive a vehicle on a new driveway for at least 10 days.

How do you lay paving slabs on a lawn?

Spread a level 1in (2.5cm) layer with the back of a rake. Step4) Start laying slabs from the lawn-side with the first slabs butted up tightly to the turf – it's better to fill gaps between the slabs with mortar, than the gap by the grass.

What sand do you use for pointing paving slabs?

Pointing of all kinds should be carried out on a dry day and when your patio itself is dry. For joints which are less than ½ an inch (13mm) you should use silver sand. This is more commonly called playpit sand. The sand is mixed with cement at a ratio of 1 to 1 and spread out to dry thoroughly.

What should I put between pavers?

Sand Between Pavers
Once all the pavers are set in place, spread more sand over the top of them. Sweep the sand between the joints with a push broom. Repeat until you fill all of the paver gaps. Use the same type of irregular, sharp-grained sand as you did for the base and bedding layers.

Can I use mortar between pavers?

Mortar can be used as a 1/2-inch to 1-inch-thick base under pavers as long as a 4- to 6-inch-deep layer of crushed rock is underneath the mortar to form a foundation. Mortar also can be used in the joints between pavers, just like grout is used between tiles.

Should a patio be sloped?

A patio should slope away from the house at the rate of 1/8" (3mm) per running foot. Generally, a 4" (100mm) thick slab set 2" (50mm) above ground level is suitable. To ensure that the height and slope are correct, begin the excavation, layout and form construction where the patio meets the house.