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-   -   extending concrete pool deck (http://www.diychatroom.com/f105/extending-concrete-pool-deck-202252/)

fatboyelroy 06-16-2014 05:21 AM

extending concrete pool deck
 
I'm in the process of extending a concrete pool deck towards a slope. I have a few questions.

My first dilemma is trying to decide whether to build a traditional cinder block retaining wall or use gabions to address the slope before pouring the slab to extend the pool deck.

If I use gabions is it ok to pour a slab on top of it?

If I go the cinder block route, should the slab sit inside of or on top of the retaining wall. Also should the retaining wall have drainage even though it will be covered by a slab?https://lh4.googleusercontent.com/-J...h701-no/14+-+2https://lh4.googleusercontent.com/-H...h701-no/14+-+1

Canarywood1 06-16-2014 11:18 AM

While I've never seen a slab on top of a gabion, that's not to say it isn't done but I think an engineer would be the one to answer your question as opposed to a layman on a DIY forum, there is one here Daniel Holzman that may see your question and jump in.

Msradell 06-16-2014 10:43 PM

That doesn't look like enough elevation drop require the use of gabions. It looks like the elevation change is <2'. If that's the case I would pour a stub wall to the frost line depth and then pour the slab onto the top of it.

fatboyelroy 06-17-2014 12:28 AM

Quote:

Originally Posted by Msradell (Post 1364477)
That doesn't look like enough elevation drop require the use of gabions. It looks like the elevation change is <2'. If that's the case I would pour a stub wall to the frost line depth and then pour the slab onto the top of it.

No frost line to worry about here in Costa Rica :). Are there any advantages to pouring a stub wall vs a cinder block wall?

Msradell 06-17-2014 10:56 PM

A stub wall will be much more stable in the long run and will be much better at resisting the pressure of the fill pressing it outward! If you use cinderblocks you are still going to have to fill them and put in a foundation to stabilize them.


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