Browse Forums Building Standards; Getting It Right! Re: Waterproof air-conditioning slab 5Oct 16, 2018 5:08 am Not quite understanding what you mean under ducted air-conditioning slab. There are ducting pipes inside the slab and duct vents placed will be in-floor? If the builder offers an upgrade, he should be waterproofing it too (it should be all covered by your building contract). Re: Waterproof air-conditioning slab 6Oct 16, 2018 5:43 am It looks a lot better than my situation at least you have a step down to your AC plinth You can get some clear sealer from bunnings to maybe spray on to slab , what the life span would be I don’t know it’s not a permanent barrier It’s a design fault really and as I said it’s down to your builder to meet the code requirements it’s not for you to come up with a solution to sort out a problem for them Part 2 of the code states you must prevent damp and moisture entering the building You can down load a free copy of this so you can have a read up on it Where abouts are you building ? Re: Waterproof air-conditioning slab 7Oct 16, 2018 2:54 pm Tim65 It looks a lot better than my situation at least you have a step down to your AC plinth You can get some clear sealer from bunnings to maybe spray on to slab , what the life span would be I don’t know it’s not a permanent barrier It’s a design fault really and as I said it’s down to your builder to meet the code requirements it’s not for you to come up with a solution to sort out a problem for them Part 2 of the code states you must prevent damp and moisture entering the building You can down load a free copy of this so you can have a read up on it Where abouts are you building ? Virginia in Sourh Australia Re: Waterproof air-conditioning slab 8Oct 16, 2018 9:54 pm alexp79 Not quite understanding what you mean under ducted air-conditioning slab. There are ducting pipes inside the slab and duct vents placed will be in-floor? If the builder offers an upgrade, he should be waterproofing it too (it should be all covered by your building contract). No it’s just a slab for the air conditioner to sit on, poured at the same time as the whole foundation, we paid extra for it, but in the contract it says we are to have it waterproofed, but it has the same plastic as the main slab, and has had the same waterproofing done by the white ant ppl. So I am at a loss to understand what blinking waterproofing they are talking about. Re: Waterproof air-conditioning slab 10Oct 17, 2018 5:29 am alexp79 I don't think it requires any waterproofing at all (except possibly slab edge touching the ground), i.e. do you waterproof your driveway? If you look at the photo you will see it’s connected to main slab so moisture and damp can penetrate up into main slab as there is no break or dpc to stop it Re: Waterproof air-conditioning slab 11Oct 17, 2018 5:32 am Tim65 alexp79 I don't think it requires any waterproofing at all (except possibly slab edge touching the ground), i.e. do you waterproof your driveway? If you look at the photo you will see it’s connected to main slab so moisture and damp can penetrate up into main slab as there is no break or dpc to stop it Where the moisture and damp will be coming from, I wonder? How do you specifically waterproof your driveway slab, which is also connected to the garage slab, etc.? Waterproofing for concrete is only needed for below grade surfaces. Re: Waterproof air-conditioning slab 12Oct 17, 2018 7:05 am alexp79 Tim65 alexp79 I don't think it requires any waterproofing at all (except possibly slab edge touching the ground), i.e. do you waterproof your driveway? If you look at the photo you will see it’s connected to main slab so moisture and damp can penetrate up into main slab as there is no break or dpc to stop it Where the moisture and damp will be coming from, I wonder? How do you specifically waterproof your driveway slab, which is also connected to the garage slab, etc.? Waterproofing for concrete is only needed for below grade surfaces. Your driveway slab is not connected to the house slab , if done correctly the dpm is extended through and then brought up the face of the slab and cut off at ground level Giving you a barrier to prevent moisture / damp entering the slab Down load a free copy of the ncc it’s all in there Re: Waterproof air-conditioning slab 13Oct 17, 2018 7:14 am Driveway connected to garage slab, garage slab - to house slab. There is no DPC between them. Same thing with the alfersco slab connecting to the house slab. If you waterproof the edges and under your aircon slab, how do you see the dampness entering to your house slab even though they are connected? Re: Waterproof air-conditioning slab 14Oct 17, 2018 7:40 am The drive way is not directly connected to the house slab it’s poured independently with expansion joint between , if the dpm is not brought up the face of the slab it is in breach of the code unless an engineer signs off on a alternative solution When you build brickwork you have a dpc to prevent rising damp and moister the dpm under the slab is the same thing it prevents damp coming into the slab , the slab is protected from the weather by the walls etc but the AC slab is left exposed but part of the slab so damp and moister can get into the main slab as there is no barrier to prevent it Are you a trades person or builder ? As I said down load the free ncc it explains it all in there The point being that it’s the builders responsibility to build to code Re: Waterproof air-conditioning slab 15Oct 17, 2018 7:55 am I see your point here. What about patio slabs which are generally get connected to the main house slab (eg alfresco ones)? There is typically no expansion joint in between. How do you waterproof those? Anybody know any good and reasonably priced Air conditioning contractors/companies that could install a ducted air conditioning system in the Central Coast NSW for a small… 0 8984 How do you remove one of these ceiling air con vents? And is it possible to disconnect the duct joined to the vent from inside the house, without going into the roof cavity? 0 5898 Hi all, sorting out the ducted air con for a 350sqm double story house. Does this placement sound reasonable to you? Also, I plan to have 6 zones I think. Living room… 0 0 |