Browse Forums Building Standards; Getting It Right! Re: DPC and weep hole height 9Jul 29, 2015 1:19 pm Stewie D This shows a slab at the perimeter and why you should leave 75mm clearance as termite protection but the principle is the same as it shows the weepholes and flashing placement. http://i1212.photobucket.com/albums/cc455/stewiesno1/Slabtermitebarrier_zps8e505a80.gif The lower slab or rather the finished surface should not be higher than the horizontal part of the DPC and/or the lower part of the weephole otherwise water will pool there. Raise that external floor too much and water will find its way inside your house. Stewie Thanks for that information! It's really a weird situation with leaving 75mm of the slab exposes and providing concrete apron around the house. There's no way you can do both really. Re: DPC and weep hole height 10Jul 29, 2015 3:09 pm I think you misunderstand the context of that drawing. It was posted mostly to show the heights of the slab, the rebate for the bricks plus the position of the weepholes and DPC. That picture illustrates how you would do a non-chemical termite proofing to the perimeter of a BV house. Quote: It's really a weird situation with leaving 75mm of the slab exposes and providing concrete apron around the house. There's no way you can do both really. Yes there is. Either... 1) Pour both slabs all in one so there is no break between the two. Then you don't need any termite proofing between the two of them. 2) Pour them separately and if you want the outside level close to the inside floor level ( allowing for DPC and weepholes etc ) you need to have some other form of termite proofing at the junction of the two slabs - termimesh etc. All it takes is a bit of foresight from the builder and for the client to choose what they want as the finished surfaces. Stewie Re: DPC and weep hole height 11Jul 29, 2015 3:36 pm Stewie D I think you misunderstand the context of that drawing. It was posted mostly to show the heights of the slab, the rebate for the bricks plus the position of the weepholes and DPC. That picture illustrates how you would do a non-chemical termite proofing to the perimeter of a BV house. Quote: It's really a weird situation with leaving 75mm of the slab exposes and providing concrete apron around the house. There's no way you can do both really. Yes there is. Either... 1) Pour both slabs all in one so there is no break between the two. Then you don't need any termite proofing between the two of them. 2) Pour them separately and if you want the outside level close to the inside floor level ( allowing for DPC and weepholes etc ) you need to have some other form of termite proofing at the junction of the two slabs - termimesh etc. All it takes is a bit of foresight from the builder and for the client to choose what they want as the finished surfaces. Stewie Sorry I misunderstood. Ignore that entire post. I thought you meant we need to keep a 75 mm gap so that the termite pipes (chemical) can be inspected. I read that somewhere else too. Re: DPC and weep hole height 12Mar 28, 2018 7:29 pm [quote="fedup1"]I have very little faith in building surveyors to do their job these days. Our surveyor did not even attend site to inspect the concrete that our builder had poured and signed off anyway /quote] There are alternate Solutions Generally they require proofs and they are certified as equivalent or better than what is required in the codes Solutions affecting the structural Integrity will need to be assessed & Certified by Engineers You should have taken photos yourself, unfortunately now you are up "Ship Creek and Aami isn't there to help" should anything go wrong. This has been discussed many times...Goodluck Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: DPC and weep hole height 13Mar 28, 2018 8:23 pm StructuralBIMGuy There are alternate Solutions Generally they require proofs and they are certified as equivalent or better than what is required in the codes Performance Solutions only need to be certified by one 'expert' as satisfying the NCC performance requirements unfortunately, not very often do they meet let alone exceed the referenced codes. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: DPC and weep hole height 14Mar 29, 2018 8:56 am Glad to hear you are getting your issue sorted fedup1. Building surveyors don't notice much and even less when they don't bother to turn up. If you are in Victoria I would urge you to lodge a complaint if you have proof your building surveyor didn't attend the site to check your slab. On some builds, including mine, building surveyors get paid for doing nothing more than putting their stamp on bits of paper they haven't bothered to look at properly. Re: DPC and weep hole height 15Mar 29, 2018 8:57 am You don't need to convince me it's been sorted, convince your insurance company... should you put in a claim ...Get it aami Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: DPC and weep hole height 16Jul 11, 2018 7:25 am hi guys, if you can help me that will be great. I am getting my first home build and the weep inserts are bit higher than the usual height. they suppose to be on a second brick from the slab but its on the third brick, does it causes a major problem, if so how can it be rectified? Re: DPC and weep hole height 17Nov 21, 2018 5:32 pm sammy8888 hi guys, if you can help me that will be great. I am getting my first home build and the weep inserts are bit higher than the usual height. they suppose to be on a second brick from the slab but its on the third brick, does it causes a major problem, if so how can it be rectified? Check your engineering drawings. The important thing is that your internal floor level is HIGHER than your DPC/weephole bottom. Typically with concrete slab houses, they can’t afford to have 2C brick then DPC as that will mean much deeper edge beam but It can be done but more expensive. Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Re: DPC and weep hole height 18Mar 05, 2022 9:05 am OK - great to hear that weep holes are a big issue (except when it's your own problem) because we have a problem as well. We have a sunken lounge room on a concrte slab that is some 250mm lower than the rest of the building. The base brick course of the weep holes are 230mm above the lounge room floor level. Twice now this floor has been flooded after massive rain events (including last weeks) and the water seems to be coming in through the weep holes. On the outside of the building the ground level is only about 80mm below the base of the weep holes. My question is should the occurence of water entering the lounge room be solved if I can lower the ground surface to at least 150mm below the base of the weep holes and drain it away or do I need to go deeper below the lounge slab floor level? interesting situation what happened after builder issued final invoice? did you list as defect or not does the building surveyor have any responsibility? ie. issuing… 13 46972 You are correct. Just read through all the ncc rules and 75mm is the minimum requirement for me. 4 11185 it depends on the natural ground level, if they excavated their boundary wall needed to be built as a retaining wall. If you filled, which sounds like the case then you… 1 7093 |