Spong
Stewie D - chippies never retire. Family and friends will make sure of that!!
I think you hit the nail on the head there!
Browse Forums Building Standards; Getting It Right! Re: Perth Building standards 22Jan 04, 2015 7:49 am Quote: Quote: Stewie D - chippies never retire. Family and friends will make sure of that!! Ain't that the truth ! Quote: I think you hit the nail on the head there! Hahaha Very good CK ! Stewie Re: Perth Building standards 23Jan 04, 2015 3:45 pm Spong trixee im not sure what you mean about the windows? I understand the principle but is the software taking into account the location, orientation, composition and operation of the windows in a building in perth and if it's brick/timber? I thought this post was a brick bashing arena!!! Windows are probably the main cause of heat loss in a house in winter. This matters, so the software takes into account the size and location of windows. Windows that face south and west lose the most heat, and don't provide any heat gain benefit in winter either as direct sunlight will only come in from north and east facing windows in winter. The software also assumes a particular behavioural pattern so it doesn't matter how you operate the windows. As windows are also key to ventilation and heat purge in summer, the software also considers the prevailing winds for your climate zone, so the position of the windows also matters from that perspective. It does take into account construction material, but to be honest we didn't play around with that to see how it would affect the rating. But it was reasonably easy to achieve an 8 star rating using double brick and strategic design. viewtopic.php?t=72683 Re: Perth Building standards 24Jan 04, 2015 3:51 pm I'm all for correct orientation, natural ventilation, shading by natural means where possible etc to achieve a good outcome but I am still amazed that a house with such a low R-value for the walls which are probably the biggest influence on the overall rating of a house and you can achieve an 8 star rating. I'm quite gobsmacked ! Going by what we are hoping to achieve with our upcoming build and R 4.5 for all the external walls we should end up with a 12 star house ! Stewie Perth Building standards 25Jan 04, 2015 11:14 pm trixee Spong trixee im not sure what you mean about the windows? I understand the principle but is the software taking into account the location, orientation, composition and operation of the windows in a building in perth and if it's brick/timber? I thought this post was a brick bashing arena!!! Windows are probably the main cause of heat loss in a house in winter. This matters, so the software takes into account the size and location of windows. Windows that face south and west lose the most heat, and don't provide any heat gain benefit in winter either as direct sunlight will only come in from north and east facing windows in winter. The software also assumes a particular behavioural pattern so it doesn't matter how you operate the windows. As windows are also key to ventilation and heat purge in summer, the software also considers the prevailing winds for your climate zone, so the position of the windows also matters from that perspective. It does take into account construction material, but to be honest we didn't play around with that to see how it would affect the rating. But it was reasonably easy to achieve an 8 star rating using double brick and strategic design. viewtopic.php?t=72683 Sorry guys I'm just working this tapatalk out so forgive me if this is all messed up!!! Thanks for getting back to me trixee. I'm still having reservations about the rating system though. It's maybe off topic now but I still struggle with the fact that project homes are getting six stars with fences blocking breezes, no eaves and so on.... I used low e glass, eaves all round, R5 walls and ceilings (combined with anticon), orientated NW, and have louvre windows on the prevailing sides with no fences to block.. My AC is bored in summer (mostly) but I get 1 star more?? Back onto the topic of Perth building, it also only took 6 months to build our stick house from slab down till we moved in and I think this fact alone will be the main reason for change in the project scene moving forward. Also saves rent during build time which must be appealing at Perth rates!! Re: Perth Building standards 26Jan 04, 2015 11:45 pm Of course putting the thermal mass on the outside and the lightweight insulated walls on the inside isn't the ideal scenario either. Reverse brick veneer is the go. Regarding WA's love of double brick. I was once told that it was because of a very successful marketing campaign one of the brick companies ran back in the 50's. There are a few suburbs in Perth built after the war that are basically all brick veneer. Midland brick (what was the major brick company in Perth) ran an advertising campaign that painted brick veneer as cheap and inferior. The public took it to heart and brick veneer quickly disappeared and DB became what the public demanded. Nowadays you'll be caned on resale in WA if you don't have DB and suspended raft slabs for double storey. As others have said, this is slowly changing but you can expect to pay a premium if you want anything different from standard DB. Personally I think DB has a certainly solidity about it that I like. Its nice to sit in my theatre room and watch a movie at full volume and know I'm not waking up the house, the kids can run around upstairs and you don't have the noise issues that you have with bearers and joists. It isn't as thermally efficient but most house at least incorporate cavity insulation during construction. My personal preference is reverse brick veneer. It gives you the best of both worlds. Accessible Carpentry & Cabinets accessiblecarpentry@gmail.com accessiblecarpentry.com.au https://www.facebook.com/pages/Accessible-Carpentry-Cabinets/583314911709039 Re: Perth Building standards 27Jan 04, 2015 11:48 pm @spong. Most project homes in Perth take 6 months for the actual build so there is no real time penalty. Accessible Carpentry & Cabinets accessiblecarpentry@gmail.com accessiblecarpentry.com.au https://www.facebook.com/pages/Accessible-Carpentry-Cabinets/583314911709039 Perth Building standards 28Jan 05, 2015 12:00 am Yes but I didn't build a project home so it's hard to say how times would compare like for like because we don't have the volume here. I have employed a few chippies from the east that reckon we are too slow and our systems (when we do get a framed house to build) just don't work well enough yet (i.e. Pre fab walls and trusses etc) and i tend to agree. If I had a dollar for every time I heard the "back home we'd do this in half the time" chat....... Re: Perth Building standards 29Jan 05, 2015 7:11 am I also think that owing to the mostly sandy soils in WA, there is a lot less ground movement. That would be ideal for a DB home and concrete floors for both levels. In places like Vic that seem to have a lot of clay soils those same DB homes would be cracking all over the place. RBV too chippy has its pros and cons. It may be OK for a warmer climate but in a colder climate not so much. The internal thermal mass of the masonry would absorb a lot of the heat before the air in the rooms starts to rise. I know some of it would be radiated back once you turn off the heating though by how much would depend on a few things. A report I saw a while back comparing alternative methods of building didn't show RBV in a good light compared to other ways of improving the construction of a house. Stewie Re: Perth Building standards 30Jan 06, 2015 5:54 pm We looked at building in BV and there is a project builder in Perth that offers to build in either DB or BV. Their costing on BV was approximately $10-20k higher than their double brick pricing. Their reasoning for this was the apparent high cost of skilled carpenters for the framing and the cost of internal painting (apparently it's mandatory to paint veneer walls). If you also painted the double brick home, the difference in price would reduce by approximately $5k. At the end of the day we built double brick purely for resale value. Re: Perth Building standards 32Jan 06, 2015 11:28 pm The render and plaster costs are additional costs to an internal brick wall. But it's not mandatory to have your builder paint a plastered wall. Under the building regulations, a veneer wall must be painted. This was one of the reasons used to justify the additional cost to choose a BV build. Re: Perth Building standards 33Jan 07, 2015 5:44 am I went to visit and interview a couple who built a RBV house in the Blue Mountains and they had underfloor heating and a polished concrete floor. It was just about winter when we visited and it was lovely and warm. It was an architect designed home (it was the architect we were going with at the time) so was oriented correctly had timber double glazed windows which of course all helped. I'm a fan of RBV having visited the house Re: Perth Building standards 34Jan 07, 2015 12:11 pm One of my clients had a house designed similarly by an architect with concrete floors and in slab heating but a BV home in the central West of NSW where they have pretty cold winters. They sold the house because their winter electricity bills were killing them. Their walls had a rating of around R 4.5, ceilings R 5.0. Underfloor heating is a nice concept but very expensive to run unless you have a good bank of solar panels to offset the cost. 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