Browse Forums Paving & Concreting 1 Mar 26, 2017 8:31 am Hi, Above the slab, in the driveway, have your stormwater pipes been - encased in concrete - expansion foam placed around them - been boxed around before concrete is poured so there is clearance. Other? Mine have exposed aggregate hard up agains them in the driveway. Paths are to be poured next week so I want to make sure pipes there have correct treatment. Is there a 'standard'? Thank you Re: Stormwater pipes in driveway/concretes paths 2Mar 26, 2017 8:38 am I would be quite happy to see them packed around with aggregate. The Harder You Try - the Luckier You Get ! Web site http://www.anewhouse.com.au Informative, Amusing, and Opinionated Blog - Over 600 posts on all aspects of building a new house. Re: Stormwater pipes in driveway/concretes paths 3Mar 26, 2017 7:47 pm Hi Gaudi I would say it is good practice to install some form of isolation joint between the new concrete and any fixed / rigid element. Typically 'ableflex' type expansion foam is used. There is an Australian Standard - AS3727 - 1993 Guide to residential pavements. The standard says that an isolation joint should be provided where a pavement adjoins a building or other rigid structure such as a drainage pit but it doesn't go so far as to say that isolation joints must be installed. Hope this helps. Re: Stormwater pipes in driveway/concretes paths 4Mar 27, 2017 7:15 pm Thank you Bashworth and gmbuilding consultant for sharing your expertise. Information is so helpful. I will look up that standard too to see what else I should know. Recently concreted driveways in the area have a mix of with and without expansion foam around downpipes. Re: Stormwater pipes in driveway/concretes paths 5Mar 29, 2017 11:33 pm Gaudi Is there a 'standard'? It has to be understood that Australian Standards are produced by Standards Australia, a private company. Australian Standards only have legality if they have been legislated or are written into a contract. As far as I am aware, AS 3727 has never been legislated and is a Guide only. AS/NZS 3500.1 has legal standing and states the following in relation to cold water service pipes but I very strongly doubt that stormwater pipes and downpipes could even remotely fit into this category. Also note that AS 3727 is not referred to in AS/NZS 3500.1. "5.5.4 Under concrete slabs (c) Any pipework that penetrates the slab shall be at right angles to the surface of the slab and shall be lagged for the full depth of the slab penetration with - (i) an impermeable flexible material of not less than 6mm thickness; or (ii) impermeable plastics sleeve or conduit providing equivalent protection." 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: Stormwater pipes in driveway/concretes paths 6Apr 05, 2017 2:18 am Thanks saveH20 There not being an agreed standard seems crazy. My concreter has just finished paths. Time will tell how well he complied with best practice. I looked up documents referred to above and bashworth's website anewhouae and some more I found. http://www.ccaa.com.au/iMIS_Prod/CCAA/P ... 40ea97277a http://www.elvingroup.com.au/wp-content ... veways.pdf http://qbis.com.au/wp-content/uploads/2 ... oklet4.pdf http://59.167.233.142/publications/pdf/ ... 520WEB.pdf I asked concreter questions but without a standard had to go with his judgement to some degree. Thanks for your help. Re: Stormwater pipes in driveway/concretes paths 7Jun 21, 2018 1:53 pm gmbuildingconsultant Hi Gaudi I would say it is good practice to install some form of isolation joint between the new concrete and any fixed / rigid element. Typically 'ableflex' type expansion foam is used. There is an Australian Standard - AS3727 - 1993 Guide to residential pavements. The standard says that an isolation joint should be provided where a pavement adjoins a building or other rigid structure such as a drainage pit but it doesn't go so far as to say that isolation joints must be installed. Hope this helps. Hi, I was just wondering if the above is still consistent with the revised AS3727 standard? I had read the standards for joints had been revised but it apparently only occurred in the last couple of years. So I was not sure if your response was referring to the old standards or the current ones in force (or if it even matters if there was no change for this particular aspect). Thanks 4 5105 As most others have posted above the install isn't compliant. The pipe is meant to be covered in loose soil or sand, the pipe has holes in it that leaks out a termicide… 10 5727 Building Standards; Getting It Right! Thank you for the generous offer. I need to get the plumber out to give me an explanation. As mentioned I haven't seen any rain water discharge from pipes 1& 3. It… 7 10808 |