New Patio Area - Tie Into Raft

Joined
5 Nov 2008
Messages
560
Reaction score
20
Country
United Kingdom
I asked a similar question a few months back but now have some pics.

I have dug out the earth for my new patio - went down approx 10"
I plan to use a concrete mix as the base then i will be laying granite slabs on a screed bed, I want this patio to last for many years.

I will be slabbing over the raft foundation so that the slabs go right upto the house.

As the house will move over time slightly I don't want to have a lip on the patio where the house is moving slightly seperatly from the house.

Would it be worth drilling in 16mm steel ties resin fixed into the existing slab, I would drill in by 150mm and I can leave a good 600mm out in the patio base then pour in the sub base mix so effectively mating the 2 together.

I live in a soft ground area (what was pulled out was all soft clay) what concrete base mix would be best I was thinking C35 dry mix but this may be overkill?

Any thoughts chaps on both?

Thanks in advance.

 
Sponsored Links
Something tells me not to rebar them together solid. The bar might help keep the two parts level but it won't stop the slab cracking. Personally I'd put a 10mm layer between the joint to induce a crack. You won't see it below the slabs and at least it will crack where you want it to. I'd also wrap the outer leg of the bar in a thin resilient material - maybe 5mm dense foam - to allow the bars to telescope. That will help restrain any vertical movement but allow a bit of lateral movement.
 
Thanks John

Anyone else with any options greatly welcomed
 

DIYnot Local

Staff member

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.


Are you a trade or supplier? You can create your listing free at DIYnot Local

 
Sponsored Links
Back
Top