Browse Forums Windows & Doors Re: Dowell Thermaline - any good? 15Sep 26, 2020 9:39 am Hi all, Can anyone give me a percent cost increase to go from double glazed to the thermaline windows? I am trying to figure out if we can afford them on a rough scale. We got quoted 6k to upgrade all windows from single to double from our builder but they can't estimate thermaline windows without talking to dowell first and we have been waiting for ages. I know it will be fairly variable depending on window side etc but I just want to get a feel for if it's another $1000 or 5000. Re: Dowell Thermaline - any good? 16Sep 26, 2020 11:47 am I got a rough idea from my builder when I was trying to get the house over 7 star rating. To upgrade for all doors and windows from single to double was $8.5k, this one I went with. Then to go from double to double thermally broken was another $15k (they didn't mention thermaline specifically, but I am using Dowel for doors/windows). The difference in the performance figures from double to double thermally broken was small considering the mammoth cost, so I declined. Re: Dowell Thermaline - any good? 17Sep 26, 2020 5:42 pm Callifo I got a rough idea from my builder when I was trying to get the house over 7 star rating. To upgrade for all doors and windows from single to double was $8.5k, this one I went with. Then to go from double to double thermally broken was another $15k (they didn't mention thermaline specifically, but I am using Dowel for doors/windows). The difference in the performance figures from double to double thermally broken was small considering the mammoth cost, so I declined. What is the total glazing area? Re: Dowell Thermaline - any good? 19Sep 26, 2020 6:25 pm Callifo I didnt post as I wasn't sure, never worked it out. Now that I have, and assuming I've done it right, it is ~32m2. Okay, so this is roughly $730 per sqm of glazing to upgrade from single glazed to thermally broken double glazed. To compare, my house total glazing area is 51 sqm: windows + 2 sliders (including one 5.6 m 2.4 lift and slide door) + 1 french door and 1 fully glazed laundry door. Those are going to cost me around $70K inc. GST total (supplied). Argon filled triple glazing in 93 mm European profile with Low E glass for West and North facing windows, U values ranging between 0.5 and 0.7 (U value of 0.5 corresponds to R value of 2.0). This is roughly $1370 per sqm of glazing. Re: Dowell Thermaline - any good? 20Oct 22, 2020 12:58 pm Callifo I got a rough idea from my builder when I was trying to get the house over 7 star rating. To upgrade for all doors and windows from single to double was $8.5k, this one I went with. Then to go from double to double thermally broken was another $15k (they didn't mention thermaline specifically, but I am using Dowel for doors/windows). The difference in the performance figures from double to double thermally broken was small considering the mammoth cost, so I declined. Wow. I didn't realise it would cost so much to upgrade! Thank you for sharing @Callifo it is really useful to have a rough guide when making these choices. Countrybuilds Victoria 9 25170 Thank you. Do I use timber floorboards for stairs or do people use timber treads? Or is both the same? 6 7642 Hi, I have had them in the past and the pros are: Versatile, i.e many different colours and styles to choose… 1 7330 |