walshie 2,804 Posted June 6, 2014 Report Share Posted June 6, 2014 I've just fixed a leaking drain in my back garden, which involved me smashing part of the concrete slab to get to it. I've filled the hole to about 4" below the level of the rest of the slab ready for concrete. My question is: Does the slab butt directly to the wall? It's not clear from the rest of the slab as some places it looks like it does and others it looks like there is a tiny gap. The house is 100 years old. The way I see it there are 3 options: 1: Butt right up to the wall of the house. 2: Leave a small gap. 3: Leave a small gap and fill it with some kind of flexible compound. If i leave a gap, how big should it be? Cheers. Quote Link to post Share on other sites
back fill 23 Posted June 6, 2014 Report Share Posted June 6, 2014 It depends on the size of the slab mate if it's covering a large area you need an expansion joint (5-10 mm) if it's only small it will be fine butted to the wall hope this helps Quote Link to post Share on other sites
tsteve9999 456 Posted June 6, 2014 Report Share Posted June 6, 2014 Butt it to the wall mate, and use a fairly wet mix. Quote Link to post Share on other sites
pip1968 2,490 Posted June 6, 2014 Report Share Posted June 6, 2014 ill ask our bob Quote Link to post Share on other sites
air gun ant 1,666 Posted June 6, 2014 Report Share Posted June 6, 2014 butt it to the wall bud Quote Link to post Share on other sites
gonetoearth 5,144 Posted June 6, 2014 Report Share Posted June 6, 2014 I've just fixed a leaking drain in my back garden, which involved me smashing part of the concrete slab to get to it. I've filled the hole to about 4" below the level of the rest of the slab ready for concrete. My question is: Does the slab butt directly to the wall? It's not clear from the rest of the slab as some places it looks like it does and others it looks like there is a tiny gap. The house is 100 years old. The way I see it there are 3 options: 1: Butt right up to the wall of the house. 2: Leave a small gap. 3: Leave a small gap and fill it with some kind of flexible compound. If i leave a gap, how big should it be? Cheers. . Put a pic on Walshi 1 Quote Link to post Share on other sites
vanman1 411 Posted June 6, 2014 Report Share Posted June 6, 2014 Butt it to the wall as said, but make sure it slopes away from the house,doesn't have to be much of a slope just so water doesn't sit against the house. 1 Quote Link to post Share on other sites
walshie 2,804 Posted June 6, 2014 Author Report Share Posted June 6, 2014 I've just fixed a leaking drain in my back garden, which involved me smashing part of the concrete slab to get to it. I've filled the hole to about 4" below the level of the rest of the slab ready for concrete. My question is: Does the slab butt directly to the wall? It's not clear from the rest of the slab as some places it looks like it does and others it looks like there is a tiny gap. The house is 100 years old. The way I see it there are 3 options: 1: Butt right up to the wall of the house. 2: Leave a small gap. 3: Leave a small gap and fill it with some kind of flexible compound. If i leave a gap, how big should it be? Cheers. . Put a pic on Walshi I'm at work at the mo, so can't supply photos, but here's a technical drawing that should explain it all. Quote Link to post Share on other sites
vanman1 411 Posted June 6, 2014 Report Share Posted June 6, 2014 I've just fixed a leaking drain in my back garden, which involved me smashing part of the concrete slab to get to it. I've filled the hole to about 4" below the level of the rest of the slab ready for concrete. My question is: Does the slab butt directly to the wall? It's not clear from the rest of the slab as some places it looks like it does and others it looks like there is a tiny gap. The house is 100 years old. The way I see it there are 3 options: 1: Butt right up to the wall of the house. 2: Leave a small gap. 3: Leave a small gap and fill it with some kind of flexible compound. If i leave a gap, how big should it be? Cheers. . Put a pic on Walshi I'm at work at the mo, so can't supply photos, but here's a technical drawing that should explain it all. Slab.jpg Feck me are you an architect that's brilliant lmao Same advise as above Quote Link to post Share on other sites
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