Browse Forums Building Standards; Getting It Right! 1 Oct 27, 2022 5:34 pm Hi I'm looking for information in regards to building regulations for chipping out concrete slab in the shower base in order to drop the shower base down and screed it so shower base will be same level as the rest of the bathroom. So basically I wanted to find out if I chip out around 50mm of the concrete base, will this affect the concrete in any way and also if it voids the insurance of the house? Re: Concrete slab alteration 2Oct 27, 2022 6:02 pm Has the reinforcement in the top layer of the slab been dropped down to accommodate the screed? The detail for wet areas should be shown in the Certified Engineering footing and slab Drawings/notes Because tiles are susceptible to cracking , it'll probably best to cut and jack hammer it out and relay the concrete, is the slab on the ground or on polystyrene? Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Concrete slab alteration 3Oct 27, 2022 6:40 pm StructuralBIMGuy Has the reinforcement in the top layer of the slab been dropped down to accommodate the screed? The detail for wet areas should be shown in the Certified Engineering footing and slab Drawings/notes Because tiles are susceptible to cracking , it probably best to cut and jack hammer it out and relay the concrete, is the slab on the ground or on polystyrene? I Don't believe the reinforcement has been dropped down because the original shower base is placed on top of the slab. I would guess the slab is on polystyrene. Is there a code or regulations that would relate to how much concrete can be be chipped out and what's the right way to do it? Re: Concrete slab alteration 4Oct 27, 2022 7:33 pm So you have no information about the slab that's there at all? I suggest you retrieve the engineering drawings from the council Building department No repair codes or regulations it's left up to your engineer Might be good idea to scan the slab for placement of reo and ribs, then decide on which certified engineering detail BTW 100mm slab on polystyrene doesn't readily chip, it cracks in chunks all the way through, hence the need for the concrete saw hth Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Concrete slab alteration 5Nov 17, 2022 5:08 pm Rezza Hi I'm looking for information in regards to building regulations for chipping out concrete slab in the shower base in order to drop the shower base down and screed it so shower base will be same level as the rest of the bathroom. So basically I wanted to find out if I chip out around 50mm of the concrete base, will this affect the concrete in any way and also if it voids the insurance of the house? you might find that your slab doesn't actually have much concrete left after carving out 50mm from the top. Re: Concrete slab alteration 6Dec 20, 2022 8:37 am Rezza Hi I'm looking for information in regards to building regulations for chipping out concrete slab in the shower base in order to drop the shower base down and screed it so shower base will be same level as the rest of the bathroom. So basically I wanted to find out if I chip out around 50mm of the concrete base, will this affect the concrete in any way and also if it voids the insurance of the house? You are probably likely on a 100mm residential slab, which means you are going to hit the reinforcement mesh at 50mm. How old is the house? Is it under warranty? Either way. at that depth you are voiding all of the original engineering on the slab. If it's still under warranty, it's an out for the builder for the rest of his warranty term if you do it and he finds out. Best to talk to a structural engineer who can provide you with a Reg 126 with the updated design, you might ask you to cut out that section of the slab completely. You would be looking at $1.5-$3k for that Design/Inspect Cert. Re: Concrete slab alteration 7Jan 11, 2023 9:53 pm Short answer, Yes it will affect, You will have a non structural slab in your bathroom. We are Expert Consultant's, and we are here to help. The concreter will take and reuse. In my case I bought structural LVLs and scraped them back and used them as joists. 1 5359 yep, clearly mark where the infloor heating pipes are before drilling or nailing 1 6202 Building Standards; Getting It Right! is this for a residential dwelling or a shed? If its for a dwelling, its out of tolerance and a "mistakes happen" isnt a good enough excuse to just move on. 1 2556 |