Browse Forums Building A New House 1 Jul 18, 2010 12:15 pm Could any Forum users provide information in relation to the installation of a DPC in a single storey brick veneer house constructed on a waffle pod slab. Should there be evidence of a plastic membrane or similar showing under the first or second row of brickwork? Is this something that the bricklayer would install at the commencement of brickwork? Is a different system of waterproofing used when construction has been onto waffle pod slab? Any information is welcomed. Re: DAMP PROOF COURSE 2Jul 18, 2010 12:50 pm Does the slab have an edge set down? The details should be in the drawings. Likely there is a set onsite. Where you are coming from is where you are going to... Re: DAMP PROOF COURSE 3Jul 18, 2010 3:25 pm onc_artisan Does the slab have an edge set down? The details should be in the drawings. Likely there is a set onsite. Hi onc_artisan Thanks for your reply/enquiry..... Yes the slab does have an edge set down.... and there are no details in the drawings provided. We had settlement just on 12 months ago and now are wondering if a DPC has been installed. We are in Victoria. Looking forward once again to any advice. Re: DAMP PROOF COURSE 4Jul 18, 2010 6:30 pm Hello, I cannot find any evidence in the BCA to suggest that waffle pods would not require the installation of DPC. DPC is used in cavities to vent the space and allow the migration of moisture to escape through weepholes. The DPC would have been installed directly beneath the weepholes. (weepholes are not always required as it depends on whether the masonry has been weatherproofed i.e. paint finish or cement render) You normally will not be able to see the DPC flashing itself, however the weepholes in the brickwork are normally evidence of its installation. Depending on your finished external ground level (paving, soil, etc) and the height will depend on the height of the DPC aswell. I believe the DPC is generally installed by the bricklayers however i could be wrong, otherwise the builder himeself could have installed it or carpenter. Hope I have been of some assistance to you Goodluck, JB Re: DAMP PROOF COURSE 5Jul 18, 2010 7:09 pm My copy of HIA general building Guidelines says: "All DPCs shall comply with the BCA. The DP membrane shall be visible in the external face of the masonary member in which it is placed and shall not be bridged by any applied coatings, render or the like." S&T says: "DPCs are defective if they are not installed in accordance with BCA." I do believe DPC is mandatory (but admit haven't checked for this). I also think the edge of the flashing should be only just visible between the 2 brick courses (but may not be visible everywhere). You have to be able to see it as the 'bottom' of your weep holes. Our DPC is installed on top of the first brick course. We have a waffle pod slab. Hope this helps. My signature is distracting people from my wise posts ... Re: DAMP PROOF COURSE 6Jul 19, 2010 3:41 pm joeb1988 I cannot find any evidence in the BCA to suggest that waffle pods would not require the installation of DPC. DPC is used in cavities to vent the space and allow the migration of moisture to escape through weepholes. The DPC would have been installed directly beneath the weepholes. (weepholes are not always required as it depends on whether the masonry has been weatherproofed i.e. paint finish or cement render) You normally will not be able to see the DPC flashing itself, however the weepholes in the brickwork are normally evidence of its installation. Depending on your finished external ground level (paving, soil, etc) and the height will depend on the height of the DPC aswell. I believe the DPC is generally installed by the bricklayers however i could be wrong, otherwise the builder himeself could have installed it or carpenter. Hi JB Thank you for the DPC info. It certainly gives us something to work on............SherWin Re: DAMP PROOF COURSE 7Jul 19, 2010 3:44 pm Lex My copy of HIA general building Guidelines says: "All DPCs shall comply with the BCA. The DP membrane shall be visible in the external face of the masonary member in which it is placed and shall not be bridged by any applied coatings, render or the like." S&T says: "DPCs are defective if they are not installed in accordance with BCA." I do believe DPC is mandatory (but admit haven't checked for this). I also think the edge of the flashing should be only just visible between the 2 brick courses (but may not be visible everywhere). You have to be able to see it as the 'bottom' of your weep holes. Our DPC is installed on top of the first brick course. We have a waffle pod slab. Hope this helps. Hi Lex.....Thanks also for the DPC info ...... Like JB, the info certainly gives us something to work on now.....SherWin Re: DAMP PROOF COURSE 9Jul 21, 2010 6:25 pm Lex No probs, I would be interested to know how did you go with this ... good luck! We have located the DPC membrane behind the brickwork but we noted it only returns back over only just on half of the brick width, therefore there is no evidence of it being visible in the external face of the brickwork or any covering at the top of the lower brick at the weep hole location. This would seem to be contrary to the BCA requirements which you advise Lex. Just something else it seems to hassle over. A DPC covering only half the requirement, would surely defeat the intended purpose! Re: DAMP PROOF COURSE 10Jul 21, 2010 8:15 pm If you can see that the flashing sits on about 1/2 of the brick width, I don't think it's a huge problem. I think your flashing and weep hole system should still perform its basic task - the routing of any water away from the timber frame and out from the building. But a word of warning - I am a complete amateur and non-expert here and please don't take my opinion as the answer or the solution. Better to call some building inspectors - they might be able to give you a quick advice over the phone. My signature is distracting people from my wise posts ... Have look at your house plans and you will probably find that brick articulation joint has been missed. Maximum allowable spacing is 6M or 5.5M for a wall with window… 17 16652 Hi all Am new to this forum. I want to get some ideas/info about how to manage an 80 year old factory restoration to convert to a residence. The factory floor is concrete… 0 3398 Hi We have a road close to our place and only an old flimsy wooden fence between us and the Neighbour closest to the road. Any ideas on a sound proof modular fence. Like… 0 5674 |