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Laying stone paving over small concrete patio/path at back & over old paving slab at front of house
I have a question regarding Laying stone paving over small concrete patio/path at back of my house and over old paving slab at front of house.
The back is section is a small run of concrete that runs approx a meter wide from the house to the grass garden.
The section at the front is old large paving slab that is between house and front wall.
I was wondering if these can be slabbed over with new paving slab.
If so what other things would i need other than the slab.
Would it be best to lay on some sand/cement mortar mix?
Thank you in advance
8 Answers from MyBuilder Landscape Gardeners
Alfreton • Member since 3 Jul 2015 • 29 jobs, 100% positive feedback
it will be fine to lay the slabs over the original concrete as long as you have 150mm between the path and the dpc height which is your internal floor height. you are best laying these on a 50mm concrete screed so that it is all keyed together.
Answered 23rd Aug 2016
To add to the other answers I would also check the concrete surface/paving you are going to lay over as essentially this is your base. As long as your existing surface is stable its all good to go.
Lay your new paving with a strong wet concrete mix (sharp sand) and keep it two brick courses below the damp course and running away from the property.
Answered 22nd Dec 2016
Wolverhampton • Member since 29 Sep 2016 • 35 jobs, 94% positive feedback
Yes it is OK to lay slabs over the existing concrete as long as the finished hight is 50mm below the damp course. You only need to make sure that all rain water will run to a drainage system or away from property draining in to the garden because the finished patio area will not allow water to drain through once completed
Answered 1st Nov 2016
As long as the base is solid with no major cracks it will be fine
Answered 29th Jan 2020
it will be fine to lay the slabs over the original concrete as long as you have 150mm between the path and the dpc height which is your internal floor height. you are best laying this on screed sand and cement 50mm.
Answered 26th Jan 2021
If you have sufficient gap between dpc and path to be laid between 150-180mm i always like to stay then you should have no issues make sure its laid on a full bed and not just dot and dab seen this fail way to many times over the years hopefully with help from everyone on here you have managed to excute the job in a correct way and got a great outcome 😀
Answered 7th Dec 2021
it will be fine to lay the slabs over the original concrete
Answered 4th Mar 2022
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