Browse Forums Windows & Doors Double Glazed Costs 22Oct 31, 2008 4:22 pm When you talk about the cost of double glazing that would be the extra cost over single glazing already included in your home cost or the whole cost of d/g minus the cost of single?
Thanks "ECOECO" At 'EcoEco', we design windows, we design the best windows, we do it for you, so that when you’re happy we are happy. Tel. 1800 326 326 Re: Double Glazing costs 23Oct 31, 2008 4:24 pm windowexpert A U-value of 8 is simply a joke Thermally broken aluminium is the minimum acceptable if you want to do it right. We do now U 1.3 PVCu window frames. True windowexpert, is your U value for the whole window or just the frame? Is that at NFRC or ANAC? Thanks "ECOECO" At 'EcoEco', we design windows, we design the best windows, we do it for you, so that when you’re happy we are happy. Tel. 1800 326 326 Re: Double Glazing costs 24Oct 31, 2008 4:38 pm 'chelle From what I've read, thermally improved windows are better than normal aluminium, but not as good as thermally broken and therefore not as expensive. I just googled some info on U values for window frames ( www.aibs.com.au/aibs_docs/vic/march_2007_seminar.PDF )... normal aluminium - 12.7 thermally improved Al - 8.0 thermally broken Al - 3.8 wooden - 3.1 uPVC - 3.1 These figures are for the frames alone not the windows as a whole. The link I mentioned in my previous post should be able to give you the U values for your particular windows. Hope that helps Hi Thermally Improved means nothing other than a U value below 8 in Asutralia - which is pretty bad!! So it's not thermally broken or some new window design - it's just a window that rates slightly better than pathetic. Double glazing does improve this - but thermally improved is worth zero on it's own... Our windows rate as follows: Aluminium EcoTech with 4mm glass (or 5mm) and 12mm air space U value 3.5 EcoTech with 4mm Low-E (or 5mm) and 12mm air space U value 2.7 uPVC EcoPluswith 4mm glass (or 5mm) and 12mm air space U value 2.7 EcoPlus with 4mm Low-E (or 5mm) and 12mm air space U value 2.1 Our thermally broken aluminium will be available very shortly at around uPVC U values. Thanks "ECOECO" At 'EcoEco', we design windows, we design the best windows, we do it for you, so that when you’re happy we are happy. Tel. 1800 326 326 Re: Double Glazing costs 25Oct 31, 2008 7:09 pm Just thought I would note that our thermally broken (edit: wrong again, thermally improved) aluminium frames have been holding up well so far heading into warmer weather as well. We've now had a couple of 30 degree days and the living area with six large windows/doors hasn't gone over 24 degrees yet (it would have been the usual 22 that day, but I wanted a bit of extra warmth and opened a window).
Living area is pretty much a constant 20-22 degrees day and night at present without any heating or cooling. Even the bathroom tile heating was switched off completely earlier this month. Bedrooms are probably around 18-20 degrees. Aluminium may be a bit of an environmental nightmare, but if that's all you can do in your budget then go for it. If the orientation is right then you don't need perfect U values! Re: Double Glazing costs 27Oct 31, 2008 7:38 pm Lyn Just thought I would note that our thermally broken aluminium frames have been holding up well so far heading into warmer weather as well. We've now had a couple of 30 degree days and the living area with six large windows/doors hasn't gone over 24 degrees yet (it would have been the usual 22 that day, but I wanted a bit of extra warmth and opened a window). Living area is pretty much a constant 20-22 degrees day and night at present without any heating or cooling. Even the bathroom tile heating was switched off completely earlier this month. Bedrooms are probably around 18-20 degrees. Aluminium may be a bit of an environmental nightmare, but if that's all you can do in your budget then go for it. If the orientation is right then you don't need perfect U values! Hi Lyn A great story. Just for the record, are you sure you have "thermally broken" windows, if you did then you would have perfect U values! Thermally broken is when the inside and outside of your windows are separated by a plastic (polyamide) strut. This "breaks" the connection inside to outside. It would give you a U value well below 3, maybe even 2. With regard to perfect U values, I agree overall. But there is a big difference between 12 and 8, and 8 and 4, and 4 and 2. It's comfort and saving the earth... In WERS, some double glazed windows rate U value 5 and some single glazed windows rate U value 5.9 - so small difference there is no value. in paying for double glazing. Yours is obviously a good performer.. "ECOECO" At 'EcoEco', we design windows, we design the best windows, we do it for you, so that when you’re happy we are happy. Tel. 1800 326 326 Re: Double Glazing costs 28Oct 31, 2008 7:42 pm No, just pressed brick veneer with standard insulation recommended for Melbourne (plus R1.5 in most internal walls). Living area is oriented ENE to NNW, 450mm eaves, improved glazing as mentioned, sarking in the roof (I swear this does make a thermal difference).
The double glazed windows heated the living room a treat during winter. Now the sun is rising further south most of the morning sun is getting blocked by our garage, midday sun by the eaves, and evening sun filters through a large deciduous tree belonging to our rear neighbour. Thought we would be baking without external blinds but it is all working so far (touch wood). I'm guessing we will need them before the sun really gets nasty ... I hate to bore everyone, but it is SO nice to actually have to step outside to see what the temperature is. Coming from an old uninsulated weatherboard that was zero in winter and 40 in summer this place is a real treat! Re: Double Glazing costs 29Oct 31, 2008 7:45 pm EcoClassic Just for the record, are you sure you have "thermally broken" windows, if you did then you would have perfect U values! Thermally broken is when the inside and outside of your windows are separated by a plastic (polyamide) strut. This "breaks" the connection inside to outside. It would give you a U value well below 3, maybe even 2. Sorry, I think "thermally improved" is the terminology. As stated earlier in this thread, they rate around a 3.7. I will fix my post! Re: Double Glazing costs 30Oct 31, 2008 10:24 pm Lyn said.
Quote: I hate to bore everyone, but it is SO nice to actually have to step outside to see what the temperature is. MattW does that to - plus he checks his electricty meters latest reading Re: Double Glazing costs 31Nov 01, 2008 8:03 am Yak_Chat Lyn said. Quote: I hate to bore everyone, but it is SO nice to actually have to step outside to see what the temperature is. MattW does that to - plus he checks his electricty meters latest reading I don't know how Matt manages to read his electricity meter, the numbers are spinning so fast! Demolition August 2009, Construction Started September 2009, Completed December 2010 Re: 32May 24, 2010 12:20 pm ed @ EcoClassic 'chelle From what I've read, thermally improved windows are better than normal aluminium, but not as good as thermally broken and therefore not as expensive. I just googled some info on U values for window frames ( http://www.aibs.com.au/aibs_docs/vic/ma ... eminar.PDF )... normal aluminium - 12.7 thermally improved Al - 8.0 thermally broken Al - 3.8 wooden - 3.1 uPVC - 3.1 These figures are for the frames alone not the windows as a whole. The link I mentioned in my previous post should be able to give you the U values for your particular windows. Hope that helps Hi Thermally Improved means nothing other than a U value below 8 in Asutralia - which is pretty bad!! So it's not thermally broken or some new window design - it's just a window that rates slightly better than pathetic. Double glazing does improve this - but thermally improved is worth zero on it's own... Our windows rate as follows: Aluminium EcoTech with 4mm glass (or 5mm) and 12mm air space U value 3.5 EcoTech with 4mm Low-E (or 5mm) and 12mm air space U value 2.7 uPVC EcoPluswith 4mm glass (or 5mm) and 12mm air space U value 2.7 EcoPlus with 4mm Low-E (or 5mm) and 12mm air space U value 2.1 Our thermally broken aluminium will be available very shortly at around uPVC U values. Thanks what is U vale and what is thermally broken can you please explain me a bit on this. am building 6 star house and nearly complete and planing to go for double glaze. Re: Re: 33May 24, 2010 1:26 pm OZEP ed @ EcoClassic 'chelle From what I've read, thermally improved windows are better than normal aluminium, but not as good as thermally broken and therefore not as expensive. I just googled some info on U values for window frames ( http://www.aibs.com.au/aibs_docs/vic/ma ... eminar.PDF )... normal aluminium - 12.7 thermally improved Al - 8.0 thermally broken Al - 3.8 wooden - 3.1 uPVC - 3.1 These figures are for the frames alone not the windows as a whole. The link I mentioned in my previous post should be able to give you the U values for your particular windows. Hope that helps Hi Thermally Improved means nothing other than a U value below 8 in Asutralia - which is pretty bad!! So it's not thermally broken or some new window design - it's just a window that rates slightly better than pathetic. Double glazing does improve this - but thermally improved is worth zero on it's own... Our windows rate as follows: Aluminium EcoTech with 4mm glass (or 5mm) and 12mm air space U value 3.5 EcoTech with 4mm Low-E (or 5mm) and 12mm air space U value 2.7 uPVC EcoPluswith 4mm glass (or 5mm) and 12mm air space U value 2.7 EcoPlus with 4mm Low-E (or 5mm) and 12mm air space U value 2.1 Our thermally broken aluminium will be available very shortly at around uPVC U values. Thanks what is U vale and what is thermally broken can you please explain me a bit on this. am building 6 star house and nearly complete and planing to go for double glaze. U Value info here... and available of http://www.wers.net Quote: What's watt - where do they go? Windows may as well be plugged into your power point going by the amount of watts they use. In energy terms, compared to bricks and mortar, windows are just holes in the wall which allow heat to move via conduction from the hot side to the cold side. The amount of heat they allow through can be predicted in a measure called window U value (or U factor). The U value of a window measures energy loss in watts per square metre per degree Celsius passing through the window, which of course shows up in your power or gas bill just like the watts of your electric kettle or iron! If a house was perfectly insulated it would require zero heating or cooling to maintain temperature equilibrium, so what we pay for in gas and electricity for heating and cooling is directly related to how much energy leaks into or out of our homes. The better a home is insulated, the less energy we need to keep our home at a comfortable temperature. Windows play the biggest part in the cost of that energy, like a leaky boat whose hull is watertight apart from a few holes - we must bail the water at a rate that is equal to the rate of the leak or the boat will sink; so too with windows and doors, we must replenish the heat gain or loss from our windows by turning on the heating or cooling to remain comfortable. Since a window’s U value is a measure of the window’s ability to conduct heat, then the lower the U value the higher its insulation or heat stopping properties. For U value, lowest is best. If we compare two windows, one with a U value of 3 and one with a U value of 2.7, then the window with the U value of 2.7 stops 10% more heat from being conducted through the whole window and requires 10% less energy to maintain the comfort level compared to the window with the U value of 3, that is 10% less in your heating or cooling bill for that window (looking only at windows in relation to energy). Everyone knows that generally double glazing is a better insulator than single glazing. But how much better depends upon design and the type of glazing. Poorly designed double glazed windows can perform worse than well designed single glazed windows where energy is concerned and double glazed windows vary enormously in energy terms. Heating & cooling can be half your energy bill. On a cold (or Hot!!) day, poorly designed single glazed windows (U value say 5 or more) can draw around 6 kilowatts per hour of energy to maintain comfort for an average 2 storey home. Choose windows wisely!! Windows are plugged in and switched on 24 hours a day - not like the dishwasher, and you can't switch them off!!. Sorry, apologies to everyone but this is straight from our brochure... Thanks Ed Quote: Which material makes the best window, aluminium, PVC or timber? What’s best is a personal choice of what suits you, based on aesthetics, cost, and performance. At EcoClassic, we can show you almost every type of construction and we can tell you the different features and benefits of each, but in the end we want you to choose because it’s your home, and we respect your opinion. EcoPlus - PVC Windows PVC windows make up the vast majority of windows in Europe and the USA, and gaining ground very quickly throughout Asia. The popularity and growth of PVC as a window material is due to its inherent energy efficiency, looks and ease of use and care. PVC (or uPVC or PVCu*) windows have the highest level of energy efficiency, they resist wind and rain exceptionally well, and the German designed hardware being fully adjustable over its life, is fit to stand the test of time. The EcoPlus window is strengthened internally with galvanised steel to which all the hardware is attached, and awning, casement and tilt and turn sashes have secondary locking and double seals for your security and comfort. PVC windows require little maintenance in terms of adjustment or attention to surface finish. Further, EcoClassic’s EcoPlus window is designed for Australian conditions, being extra UV stable, and having integrated flyscreens which remain in place during operation, and optionally it comes fully installed in your new home by EcoClassic expert tradesmen. (*The “u” in uPVC or PVCu refers to unplasticised or rigid PVC.) EcoTech - Aluminium Windows Aluminium windows have stood the test of time, but now their lower energy efficiency in a world of increased energy awareness and better designed products means that the use of aluminium as a window material is increasingly becoming a handicap. But rest assured, EcoClassic’s EcoTech aluminium double glazed window ranks number 1 against all the other aluminium windows for energy efficiency (there are over 7,000 of them) and it is cyclone rated too. The EcoTech aluminium window even beats some competitors’ thermally broken products for energy efficiency, and the thermally broken design is supposed to be the highest of energy efficient design. EcoTech aluminium windows are protected by a high quality Akzo Nobel powdercoated finish and require little maintenance other than a wash in any car-wash type detergent. EcoTherm - Thermally Broken Aluminium EcoClassic’s EcoTherm, thermally broken aluminium windows, are designed by separating the inside and outside aluminium components of every member of the window, and rigidly joining these together with an insulator material made of plastic (polyamide). Because the inside and outside of the windows are not connected, the polyamide prevents the heat transfer between the inside and outside of the home which occurs in traditional aluminium window design. Because thermally broken windows are constructed with separate internal and external aluminium skins, EcoClassic offers the choice of different powdercoated colours, inside and outside, and, similar to standard aluminium, they require little maintenance. "ECOECO" At 'EcoEco', we design windows, we design the best windows, we do it for you, so that when you’re happy we are happy. Tel. 1800 326 326 Re: Double Glazing costs 34May 24, 2010 1:37 pm Our whole house (41sq, so not small) cost $4,000 to upgrade to double glazed windows. The windows are Stegbar and our builder is Hermitage Homes, Victoria. Our house thread: https://forum.homeone.com.au/viewtopic.php?f=31&t=18335 Re: Re: 35May 25, 2010 2:10 pm Quote: Which material makes the best window, aluminium, PVC or timber? What’s best is a personal choice of what suits you, based on aesthetics, cost, and performance. At EcoClassic, we can show you almost every type of construction and we can tell you the different features and benefits of each, but in the end we want you to choose because it’s your home, and we respect your opinion. EcoPlus - PVC Windows PVC windows make up the vast majority of windows in Europe and the USA, and gaining ground very quickly throughout Asia. The popularity and growth of PVC as a window material is due to its inherent energy efficiency, looks and ease of use and care. PVC (or uPVC or PVCu*) windows have the highest level of energy efficiency, they resist wind and rain exceptionally well, and the German designed hardware being fully adjustable over its life, is fit to stand the test of time. The EcoPlus window is strengthened internally with galvanised steel to which all the hardware is attached, and awning, casement and tilt and turn sashes have secondary locking and double seals for your security and comfort. PVC windows require little maintenance in terms of adjustment or attention to surface finish. Further, EcoClassic’s EcoPlus window is designed for Australian conditions, being extra UV stable, and having integrated flyscreens which remain in place during operation, and optionally it comes fully installed in your new home by EcoClassic expert tradesmen. (*The “u” in uPVC or PVCu refers to unplasticised or rigid PVC.) EcoTech - Aluminium Windows Aluminium windows have stood the test of time, but now their lower energy efficiency in a world of increased energy awareness and better designed products means that the use of aluminium as a window material is increasingly becoming a handicap. But rest assured, EcoClassic’s EcoTech aluminium double glazed window ranks number 1 against all the other aluminium windows for energy efficiency (there are over 7,000 of them) and it is cyclone rated too. The EcoTech aluminium window even beats some competitors’ thermally broken products for energy efficiency, and the thermally broken design is supposed to be the highest of energy efficient design. EcoTech aluminium windows are protected by a high quality Akzo Nobel powdercoated finish and require little maintenance other than a wash in any car-wash type detergent. EcoTherm - Thermally Broken Aluminium EcoClassic’s EcoTherm, thermally broken aluminium windows, are designed by separating the inside and outside aluminium components of every member of the window, and rigidly joining these together with an insulator material made of plastic (polyamide). Because the inside and outside of the windows are not connected, the polyamide prevents the heat transfer between the inside and outside of the home which occurs in traditional aluminium window design. Because thermally broken windows are constructed with separate internal and external aluminium skins, EcoClassic offers the choice of different powdercoated colours, inside and outside, and, similar to standard aluminium, they require little maintenance. Thanks for that. I have aluminum windows, is that possible to replace to UPVC double glazing (remove all windows replace with upvc) and my windows u-value is 4.86 to reduce this and to make house warm during winter and cool during summer what needs to be done. I prefer to change entire windows instead of adding glass to existing windows which won't look nice in my opinion Re: Double Glazing costs 37Aug 02, 2010 8:54 pm I have really bad timber framed (meranti) single glazed windows on my 25-30 year old home in Melbourne. I say 'bad' because they leak/transfer temperature and sound like a sieve. Cold and drafty house in Winter and Hot house in summer despite sun blinds all round. Local airport is now getting more and more helicopter traffic which is becoming unbearable. Prior to this change of air traffic it was not really a bother. Anyway I've always wanted DG windows after living in Sweden about 20 years ago and being amazed that it could be -10 outside and I was inside with t-shirt, jeans and only socks for footwear. So I am trying to ascertain the costs of upgrading my current windows with either; a) Thicker single glazed glass (6.38mm Comfortplus - most likely Green 71) b) Add on double glazing (not that keen on this option really), c) Aluminium thermally broken units. A work colleague is doing a major house reno and he has 51m2 of windows and his costs for installed thermally broken aluminium framed DG units is approx 51K so that is 1K per square metre. Reading on here I see wildly different figures than this. Some say 4.5K to do a 24 square home, some others say 8k for 30 square home. We have 84m2 of windows in this barn and no way can I justify an 84K outlay for this type of upgrade. So if somebody knows, my question is what is an approx cost per square metre (installed) for all or any of the above before I get quotes?? Just need ballpark figure(s) to see if I am wasting my time. Thanks! Re: Double Glazing costs 39Aug 10, 2010 1:06 pm JJJ I have really bad timber framed (meranti) single glazed windows on my 25-30 year old home in Melbourne. I say 'bad' because they leak/transfer temperature and sound like a sieve. Cold and drafty house in Winter and Hot house in summer despite sun blinds all round. Local airport is now getting more and more helicopter traffic which is becoming unbearable. Prior to this change of air traffic it was not really a bother. Anyway I've always wanted DG windows after living in Sweden about 20 years ago and being amazed that it could be -10 outside and I was inside with t-shirt, jeans and only socks for footwear. So I am trying to ascertain the costs of upgrading my current windows with either; a) Thicker single glazed glass (6.38mm Comfortplus - most likely Green 71) b) Add on double glazing (not that keen on this option really), c) Aluminium thermally broken units. A work colleague is doing a major house reno and he has 51m2 of windows and his costs for installed thermally broken aluminium framed DG units is approx 51K so that is 1K per square metre. Reading on here I see wildly different figures than this. Some say 4.5K to do a 24 square home, some others say 8k for 30 square home. We have 84m2 of windows in this barn and no way can I justify an 84K outlay for this type of upgrade. So if somebody knows, my question is what is an approx cost per square metre (installed) for all or any of the above before I get quotes?? Just need ballpark figure(s) to see if I am wasting my time. Thanks! As AGG has said - lots of variables. But here goes... installed 84m2 of double glazed windows... Thermally broken $50-60k (u value 2.7) Aluminium improved $40-50k (u Value 3.5) Depends on access, window/door type etc. etc... May need Low-E on Northern and Western facing (in addition to DG). As you have timber windows, you really need inline reveals - and that's just 2 brands, EcoClassic and one other . Ed "ECOECO" At 'EcoEco', we design windows, we design the best windows, we do it for you, so that when you’re happy we are happy. Tel. 1800 326 326 Re: Double Glazing costs 40Sep 10, 2010 9:53 pm Hi I've been looking at quite a few display homes over the past weeks. All had sliding or hung windows with aluminum frames and single glazing, some of the fancier ones had powder coated awning windows. It seems that none of the builders made a particular point of the type of window installed or even offered any glazing upgrades. Is there such little demand in decent windows?? What cost factor are standard windows in a typical 40-50sq home? What is the cost to upgrade to low-e coated double glazing? Are uPVC frames cheaper to manufacture than aluminum? Cheers, Razer This is one of the reasons I decided to go overseas for my double glazed windows. As the builder indicated, he's worked on many upmarket builds, these were the most well… 13 19239 For your reference Performance Labels: Window assemblies in housing, except timber windows, must be labelled so the label can be seen when it is in situ. For timber… 6 7713 I’m in a similar position except I’m after sliding 3 stacking doors. I am on a second-story apartment of which the balcony would not adequately fit any bi-fold or… 5 16148 |