How do you lay paving slabs on a concrete base, 3m by 4m?

Question

I have a concrete base 3m by 4m, in my garden. I wish to pav this. How do i fix the paving slabs to the base, what is the mixture required.

I have zero DIY knowledge, but whant to give this a go.

Answer 1

Have just had slabs laid , they dug out about 4 inches down laid crush and run and wacked it down , then to secure the slabs mixed 3 sand to 1 cement put a blob on each end of slab and laid them obviously checking level as they went . They said this was more secure than just a sand base , took a little longer but a cracking job ............ well sorry for mentioning that they dug out I was just trying to be helpful and mentioning what my Proffesional people did it in case it did differ from a concrete base .... anyway 3 to 1 they used ....remind self never to answer DIY question again stupid woman ....

Answer 2

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RE:
How do you lay paving slabs on a concrete base, 3m by 4m?
I have a concrete base 3m by 4m, in my garden. I wish to pav this. How do i fix the paving slabs to the base, what is the mixture required.

I have zero DIY knowledge, but whant to give this a go.

Answer 3

Most of the answers given here are good but in my opinion, to save time, money and hard work the 5 dab mortar solution would be best. You have a good solid foundation so will have no migration problems (soil movement) under your slabs. Ants and water can shift the sharp sand if slabs are laid on this but this is the easiest to remove when you want to change or repair your slabs as is the dab method. Slabs can be damaged and when laid on a full mortar bed it is hard work to remove them. You can paint on pva glue on the back of the slabs to make them bond to the mortar or as suggested a slurry of cement and water. You want the mortar to be slightly weaker than the slabs so go for a 5:1 ratio and if you are using natural stone, ie sandstone use a 6:1 ratio. Some people would dissagree with the dab method but if you know you have good water dispersal thru the area you want to slab this would change if you put a full bed of mortar down perhaps flooding another area of your garden creating more problems for you

Answer 4

Best Way To Lay Slabs

Answer 5

Slab mix is 6:1 sharp sand to cement. Semi dry. Lay it out. Level each slab with a rubber mallet or something similar. Use the dab method if you want lots of broken slab and ants nests. Slabs should always be laid on a bed of semi dry sand and cement. And to those saying just use sand!!! Are you for real!

Answer 6

As FERRIS.. says, you already have a base, so all talk of digging out and/or laying sand/rock is irrelevant. 4:1 sand cement mix with 5 dabs per slab. Work out where you want to drain to and work up and away. Once the slabs are solid fill in the joints with a similar mix brushed in dry and tamped down well, atmospheric moisture will set it hard. If it is to drain to all sides, start in the middle and work down.

Answer 7

How To Lay Patio Slabs

Answer 8

For the best answers, search on this site https://shorturl.im/axXJ8

Yes you can.In fact once the cement dries and sticks the lower paving it actually makes the perfect base for new slabs.When you say can l,do you mean your boyfriend,who has just finished digging out the pond.Slavery is now illegal. Don't buy your pump from e/bay,instead B&Q is better as you can take it back if not working or wrong size.Try it without a seperete filter,the pump filter will probably be enough.It can be emptied easily.Get a quite powerful one as you can always lesson the pressure.

Answer 9

you mix a sand and cement mix ..it must be ply able and not too stiff ..clean off the slabs and wet it down with a sand and cement slurry ..this will help the slabs to adhere to the concrete..then put down 5 dabs of mortar ..one in each corner and one in the middle ..then gently tap down the slab till level ..if you butt them together you must ensure there are no lips .. if unsure leave a gap for a joint

Answer 10

Better to raise the bed two inches, you can use lumber around the edge, or some paving edging. Then put two inches of sand on the base, then put the paving slabs on.