Browse Forums Building A New House Re: Owner Build House - Denham Court 21Jul 08, 2019 11:42 pm Hi Tony. Your concreter sounds like he is experienced and is obviously confident in what he does but he seems to be putting a lot of trust in the poly film to provide the waterproofing. Poly is fine for slab on ground but there will be a lot of hydrostatic pressure behind the wall. In the pictures above you can see that the taping isn't complete and there is likely to be penetrations through the poly from all the work building the formwork. You only get one shot at getting the waterproofing right and I'd be concerned that long term this may not be the best solution. I'm in WA and we do have slightly different types of construction over here but I must confess we would be doing this job in several pours, hence my earlier questions. Construction joints in concrete are very common, all high rise buildings have them and when handled properly they perform perfectly. Over here your pool would also have been built and would actually be a structural part of the houses footings. You seem pretty switched on, are you involved in the building industry at all? I'm a carpenter and have owner built twice now. One bit of advice, the cheapest price isn't always the best quote to go with regardless of how much the tradie might talk themselves up. Hope it all goes well for you and I'll be interested to follow along. Out of interest can you post up your engineering details for that section. Accessible Carpentry & Cabinets accessiblecarpentry@gmail.com accessiblecarpentry.com.au https://www.facebook.com/pages/Accessible-Carpentry-Cabinets/583314911709039 Re: Owner Build House - Denham Court 22Jul 09, 2019 12:48 am Hydrostatic pressure will be coming from the side of the wall, not from the bottom. 1.85 m without proper drainage and waterproofing on the other side is a call for a trouble and, unfortunately, this is not a concreter's call to decide how waterproofing to be done, but your engineer should have to specify this on his drawings (especially agg drainage behind the wall). And once you put in agg drainage and waterproof, then you have to back fill and compact back fill, but you won't be able to do it before the wall is core filled, hence, 2 pours will be necessary. You can still try and add RadMyx to the concrete when you pour the wall in your particular case, however, with aggregate drainage the hydrostatic pressure still becomes an issue. As Chippy said above, in WA they have much more experience dealing with concrete and therefore their practices are really worth looking into (and not only with the concreting). Re: Owner Build House - Denham Court 23Jul 09, 2019 2:08 am chippy Hi Tony. Your concreter sounds like he is experienced and is obviously confident in what he does but he seems to be putting a lot of trust in the poly film to provide the waterproofing. Poly is fine for slab on ground but there will be a lot of hydrostatic pressure behind the wall. In the pictures above you can see that the taping isn't complete and there is likely to be penetrations through the poly from all the work building the formwork. You only get one shot at getting the waterproofing right and I'd be concerned that long term this may not be the best solution. I'm in WA and we do have slightly different types of construction over here but I must confess we would be doing this job in several pours, hence my earlier questions. Construction joints in concrete are very common, all high rise buildings have them and when handled properly they perform perfectly. Over here your pool would also have been built and would actually be a structural part of the houses footings. You seem pretty switched on, are you involved in the building industry at all? I'm a carpenter and have owner built twice now. One bit of advice, the cheapest price isn't always the best quote to go with regardless of how much the tradie might talk themselves up. Hope it all goes well for you and I'll be interested to follow along. Out of interest can you post up your engineering details for that section. Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Re: Owner Build House - Denham Court 24Jul 09, 2019 2:18 am alexp79 Hydrostatic pressure will be coming from the side of the wall, not from the bottom. 1.85 m without proper drainage and waterproofing on the other side is a call for a trouble and, unfortunately, this is not a concreter's call to decide how waterproofing to be done, but your engineer should have to specify this on his drawings (especially agg drainage behind the wall). And once you put in agg drainage and waterproof, then you have to back fill and compact back fill, but you won't be able to do it before the wall is core filled, hence, 2 pours will be necessary. You can still try and add RadMyx to the concrete when you pour the wall in your particular case, however, with aggregate drainage the hydrostatic pressure still becomes an issue. As Chippy said above, in WA they have much more experience dealing with concrete and therefore their practices are really worth looking into (and not only with the concreting). Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Re: Owner Build House - Denham Court 25Jul 09, 2019 4:27 pm I would definitely check your drawings with StructuralBIMGuy or CornellEngineers on this forum. 300 mm wall is certainly good enough and they probably try to use void formers for waterproofing, however, I would still reckon aggregate drainage is a must, especially considering that almost 2 m wall is facing inside area of the house. Re: Owner Build House - Denham Court 26Jul 09, 2019 6:08 pm Hi Tony How'd the pour go? Thanks for posting up the engineering details. alexp79 there is ag drain along the full length of the wall in question or at least the second drawing calls for it. It appears that you are building as per the engineering requirements. It's different to the way we build over here. We are on sand so very different as far as drainage goes. The waterproofing is still something I'd be doubling down on and probably going above and beyond just to make sure, but hopefully all has gone well for you today. It's always good when you get out of the ground. Accessible Carpentry & Cabinets accessiblecarpentry@gmail.com accessiblecarpentry.com.au https://www.facebook.com/pages/Accessible-Carpentry-Cabinets/583314911709039 Re: Owner Build House - Denham Court 27Jul 09, 2019 7:03 pm chippy Hi Tony How'd the pour go? Thanks for posting up the engineering details. alexp79 there is ag drain along the full length of the wall in question or at least the second drawing calls for it. It appears that you are building as per the engineering requirements. It's different to the way we build over here. We are on sand so very different as far as drainage goes. The waterproofing is still something I'd be doubling down on and probably going above and beyond just to make sure, but hopefully all has gone well for you today. It's always good when you get out of the ground. The pour went great. There's the obvious air pockets on the drop edge beam but apart from that it's all done great. They did double down along the wall with the plastic former and yes there was an Ag line along the whole wall. I couldn't stay the whole time but here are some photos. I'll take some more tommorow. Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Re: Owner Build House - Denham Court 28Jul 10, 2019 7:38 am Tony Angievski chippy Hi Tony How'd the pour go? Thanks for posting up the engineering details. alexp79 there is ag drain along the full length of the wall in question or at least the second drawing calls for it. It appears that you are building as per the engineering requirements. It's different to the way we build over here. We are on sand so very different as far as drainage goes. The waterproofing is still something I'd be doubling down on and probably going above and beyond just to make sure, but hopefully all has gone well for you today. It's always good when you get out of the ground. The pour went great. There's the obvious air pockets on the drop edge beam but apart from that it's all done great. They did double down along the wall with the plastic former and yes there was an Ag line along the whole wall. I couldn't stay the whole time but here are some photos. I'll take some more tommorow. Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ I mean air bubbles Re: Owner Build House - Denham Court 31Jul 18, 2019 5:25 pm Looking good on the concrete finish. Geez you must have put in some serious amount of concrete into your foundations and pool base. How have you found the owner build side of it so far? We considered it, but as we are only to this region to be honest I didn’t know any trades (or people in general!) to be confident. So we went with a ‘small volume’ local builder. We have our own key during the build and with their permission we have done some minor things ourselves, but overall the way I look at it is we are paying these guys a premium to access their long term trades. At least we know their quality controls are pretty good etc. But yeah I would have enjoyed being more involved throughout the whole project, so maybe one day I will have the courage to do an owner build like you. Good luck with it anyhow. --------------------------------------------------------------------- Check our Homeone build blog here Re: Owner Build House - Denham Court 32Jul 18, 2019 6:41 pm darb74 Looking good on the concrete finish. Geez you must have put in some serious amount of concrete into your foundations and pool base. How have you found the owner build side of it so far? We considered it, but as we are only to this region to be honest I didn’t know any trades (or people in general!) to be confident. So we went with a ‘small volume’ local builder. We have our own key during the build and with their permission we have done some minor things ourselves, but overall the way I look at it is we are paying these guys a premium to access their long term trades. At least we know their quality controls are pretty good etc. But yeah I would have enjoyed being more involved throughout the whole project, so maybe one day I will have the courage to do an owner build like you. Good luck with it anyhow. Thanks. I'm lucky I have a few friends in the trade who have recommended others that I needed. It's not easy. Like most people say you need time to be owner builder. I get to be more hands on change things on the go which is good. As for the foundations I had around 95 piers all went to shale. We went around 2.5 metres deep around the pool. I made sure this house will last me as it will be our family home. I'm also lucky my wife's uncle is a builder and his son is an engineer so nobody can't cut corners cause I have them to overlook at stages. Knock on wood so far so good. My first home we were ready to do owner builder but couldn't get the funds from the bank so had to go with a builder. At least I got to see each process and got to see how bad the workmanship was. It's hard with non custom builders to find good tradies as they don't pay them enough to care about the work. Keep the numbers from the tradies that do good work for future reference. Re: Owner Build House - Denham Court 37Jul 31, 2019 2:20 pm Hi Tony Angievski, Looking at your front door sill, is that some form of 'capillary break' sitting under your bottom plates there? I am assuming the black stuff to the right there (under the bottom plates) is a DPC? Reason I ask is our builder didn't install anything under the external wall bottom plates, and my logic now would be to add something there to totally avoid any possibility of moisture making its way up from the concrete to the timber framing. Anyhow progress and quality looking good. Cheers --------------------------------------------------------------------- Check our Homeone build blog here Re: Owner Build House - Denham Court 38Jul 31, 2019 2:38 pm darb74 Hi Tony Angievski, Looking at your front door sill, is that some form of 'capillary break' sitting under your bottom plates there? I am assuming the black stuff to the right there (under the bottom plates) is a DPC? Reason I ask is our builder didn't install anything under the external wall bottom plates, and my logic now would be to add something there to totally avoid any possibility of moisture making its way up from the concrete to the timber framing. Anyhow progress and quality looking good. Cheers Hi darb it's actually a termite barrier. Re: Owner Build House - Denham Court 40Oct 20, 2019 1:48 pm Been a while since I posted. Here is an updated photo of where I'm at It's all rendered getting painted on Tuesday. Front door in 2 weeks same as garage door. Should be at lockup soon. I used cladding on the outside called masterwall. 150mm thick screwed straight into the stud. One of the most energy efficiency things you could get. That with my double glazed windows never have to run the aircon. Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ I've filled, levelled and compacted around 100mm of roadbase in preparation to lay some outdoor court tiles. Prior to doing the final compaction, I dusted the top with… 0 3044 Sorry but you have a crap builder. Probably too late now. For our last build I only spoke to builders who would allow me easy access (at no cost). I used my own sparky… 10 9820 If so what were the "special circumstances" under which it was granted? "Note: If the development consent is for 'dual occupancy' an owner-builder permit can only be… 0 14069 |