Double Glazing! The Little unknown Truths.
HTML-код
- Опубликовано: 20 янв 2021
- Not all double glazing can be treated equally, and in this video we talk about the spacing in glazing, the foam spacer that is used, and the gas that goes in between the panes of glass. Its all important, when considering the windows that go into your home.
The content of this video is based on the climate of Melbourne, Australia, which may not be suitable for your location.
#windowglazing #buildingperformance
blueskywindows.com.au/
efficiencymatrix.com/ 
Хобби
I like this guy.he doesn't draw out explanations as is direct and gives you the info you need quickly whereas others would take an hour to say what he has in basically 10 mins. Thank you!
Ok wow. This was a phenomenally well explained and well structured video! Even if you put the content aside, I love how clear and well structured the presentation was! If science channels on youtube explained things like this it would help people understand much quicker. Amazing work!
Thanks for this full explanation about double glazing windows 👍
Some of our Australian standards are truly world class. In the case of our building/construction code and glazing requirements we are well and truly behind the eight ball.
Thank you very much, Joseph. Your explanation is excellent.
Learned a lot, thank you it was very well explained. This is what I was looking for.
Increíble video !!!! Love it one of the best I have seen
Masterful video. Much thanks to you and the team.
Good to see you are back creating quality content.
Excellent descriptions!
Thank you Joseph for your wonderful insights on this subject. I agree with a lot of your thoughts and opinions on this subject that not all double glazing is created equal.
Key points:-
- Cold aluminium window frames (non-thermally broken) do perform very poorly thermally,
- The optimal space between the glass is between 12mm & 14mm,
- Argon being the ideal next level performing gas for IGU's (Insulating Glass Units) more commonly known as Double Glazing,
- Air seals and airtightness being super important in helping achieve optimal energy performance through correct installation of windows into the building envelope,
- Tight seals on windows being critical. etc.
Aluminium Windows, unfortunately, get a bad rap generally but like double glazing, not all Aluminium Windows are created equal.
Thermally Broken Aluminium Windows are amongst some of the highest performing windows in the world. So not all aluminium windows are bad. Yes, uPVC Windows perform exceptionally well but their sustainability credentials are really bad. Thermally Broken Aluminium Windows, like all aluminium, can be recycled at end of life. uPVC cannot easily.
In addition to the window frame, the spacer as you said is super important. Unfortunately, the Insulglass Double Glazed unit that you use in your video from AGG (Australia Glass Group) does not contain a foam spacer and in fact, contains a Plastic Hybrid Stainless Steel spacer. These are in my opinion, superior to foam spacers.
The main points of difference being:-
- Plastic Hybrid Stainless Steel spacers and Foam Spacer thermal performance is almost identical with the Foam Spacer just winning by a nose.
- Foam Spacer has an integrated desiccant that is supposedly designed to absorb condensation that forms inside your IGU (Double glazing). This amount is a substantially smaller amount for Foam Spacers, when compared to the amount that a Plastic Hybrid Stainless Steel spacer can hold, which makes a Plastic Hybrid Stainless Steel spacer more superior in this instance.
- The actual primary seal (PIB or Butyl) that seals the edge of a spacer is just as a critical component as any. Foam Spacers typically fail at this junction commonly when compared to Plastic Hybrid Stainless Steel spacers which typically do not fail.
You don't want to be paying for Argon only to lose it quicker than you should due to the failure of your foam spacer.
Other than these points, keep up the great work of promoting higher performance for all buildings in the Australian market.
Excellent feedback Vince. It would be good if you can share any comparative table between various spacers so I can include that in the next instalment of the video.
@@josephcheung3964 hi Joseph, I was looking for the correct type of butyl for my homemade double pane glass. Any advice would be greatly appreciated. Thank You
best video to explain something. Good work
Excellent video
Very informative. Thank You!
Great video, thank you!
Great video!!
Finally a video on windows that doesn't come across as condescending/patronizing.
The video was really good ... Thnx
Wow. So much info!
Very good, thanks
Great vid, thanks
This was so well explained! Never knew anything before watching this i feel like a pro! hah
Thank you United!
The impact of the spacer bar is minuscule. He way over plays that and doesn't say it tends to seal failures.
Thank you!
Thank you so much
Excellent info, much appreciated. Today I went and checked out polycarbonate microcell panels as a double glazing alternative. You lose the view, and a fair percentage of light, but get a good u value at a third of the cost. Curious if you think it has a place in the residential universe?
I had double thermopane wood frame . Went to triple pane argon with a reflective film , three piece pvc frames . I would never go back , but we get more - 40 days than +30 ones
My parents recently purchased a large (roughly 3 feet by 6 feet) picture window. My dad and I installed it. It was triple paned, with argon in both voids, and a lowE coating on all 3 panes. The frame was vinyl (PVC). We get pretty cold winters here (Eastern Canada). One night in February, I got out my temperature gun and checked to see how much heat was being lost through the window. It was actually warmer than the WALLS of their house. I was amazed.
No insulation in the walls?
@@ecoevo They have fibreglass batting in 2x4 framing. And I think there are multiple layers of sheathing (plywood or chipboard), plus vinyl siding. The walls were reading about 19-20 degrees Celsius, while the window was 21-22.
@@ahobimo732 Are those Temperatures taking into account Emissivity?
@@ahobimo732 2x4 so it's an old house or cottage? Also in winter the R value cuts in half when -10 degrees. fyi.
Thanks!
aye mate. Noice video. I recently met up with two different window companies. Neither of whom knew about the U Factor. I have known about since the 80s and guys are coming up blank
Was about to ask about window tinting haha keen for the next one!
A lot more cost effective and much better ROI. Double glazing you will never see a ROI in a retrofit
Just out of interest regarding window / glass tinting
I’ve wrote a couple articles printed in the “ The Owner Builder “ magazine ( Australia) edition 180& 181 2013/2014 you may like to read up
The editor cut back my initial 6000 -7000 worded article to about 2000 words so taken a lot the “meat “ out of the article with a few mistaken edits thrown in .
But may offer a bit more in-depth info
From my 45 years in the industry here in Australia ( particularly here in Tasmania)
Getting the right product to suit the appropriate glazing can be very beneficial . So as much technical info can be helpful on both glass and after market solar filming
Unfortunately a lot of miss info going around
I went from double glazed to single and the difference in the temperature regulation inside is extreme.
The same with regards to condensation and mould issues.
Thankfully I’m moving back to a new home with double glazed.
The difference is about 100%.
Really good presentation, lots of information very well presented, but I would debate the perceived advantages of foam and other non-metallic spacers versus thin wall stainless in long term performance and durability, and "edge of glass" is 62.5mm from the actual edge (into the face of the lite), while "center of glass" is the entire glass surface that is not within 62.5mm from the edge rather than a vague circle in the middle of the glass face.
Very informative video, where are 2nd video to talk about glass type?
@ecoevo
Very good and clear video. Thank you! Where can i find he video about the thikness and kind of glass? Thank you!
Thanks, that’s great info
Nice
Great info here!
Anybody know where to find the second part of this video he referenced (covering glass material, coating and tints)?
Hi, I've recently discovered your channel and I think it's brilliant!
In southeast Australia's relatively mild climate (compared to parts of Europe or North America where winter days of -40 celsius are common), how big a difference do uPVC frames make, as opposed to Aluminium?
www.upvcwindows.org.au/technical-info.html
Based on the windows design the performance can vary a lot. But this will give you an idea.
regarding to the energy saving item ,i think the glass play the important part ,esp.the U-value for warm save and SC value for heat-resistance . learned one kind of high performance low E glass which called Optilite S1.16 had been installed on so many windows in New Zealand . if u are interesting in it , pleasure to talk more with u later .
Hi! Looking for the 2nd video on glazing? Thanks!
I love this guy
Hey I saw him first
@@w8mpx667 LOL
was there ever a part 2 that discusses glass thickness, tinting , and coatings as mentioned 08:50 ?
Nice video! What would you recommend for nothern Australia climate? I'm in Brazil, near São Paulo - but already enterring a region called "Peripheral Depression" that is lower than the Ocean Ridge (Serra do Mar) and quite a bit warmer - and I think thqat would be similar to Northern Australia. Thanks!
One observation about sound: depending on the gap used a double glass windows will perform even worse than a single glass unit because of some phenomenon I actually can't explain ... lol. The guy who taught me that when I was doing audio engineering, however, is a pro!
Resonance perhaps. Depending on the sound frequency. 👍🏻. In northern Australian climates you would want SHGC to be as low as possible, balanced with how much visible light you can get into your home.
I have another question: would putting a plexiglass right on the exterior of my window, would that amplify sounds from the traffic?
What do you guys think of Eco Star Double Glazing, are they any good?
Any opinions about double glazing a static caravan?
If will be great if you can also post some videos in Cantonese! Looking forward to it!
I would love to do that. However, our target audience is the English speaking community. Also, the climate condition and the corresponding design considerations are very different from the climate here in Victoria, Australia. If you are interested in our content, we can negotiate some kind of licencing arrangements that you can do voice over in Mandarin or Cantonese or Shanghainese. I just need to review the scripts in Chinese.
Thanks for the informational video. Would you recommend triple glazed windows over double glazed ones in Melbourne? What U-value should I target? Thanks.
You want to go for the lowest U value you can afford. There is no particular U value that we can recommend, because it’s all decided on budget.
As a rule of thumb, for a good performing thermal performance, you want your window to be half the R value of your wall R value. But this can be expensive, and may not even be available in Australia. The alternative could be, reduce your window size.
It doesn't matter, as soon as the seal breaks and the gas escapes the condensation moves in and the window becomes foggy... it always happens.
Where looking to get the sliding door done
I did not hear mention vacuum sealed double glazed windows. There is no heat transfer through a vacuum good for sound insulation, too). Same idea that’s used in your favourite thermal drink bottle.
I'm pretty sure you can't have vacuum sealed glazing as the panes suck together
@@MrHavokman vacuum glazing systems use tiny spacers about 25mm or so to hold the glass lites apart. They work but they are visible and can be annoying to some people.
Does make it warmers inside at winter here
9:39 just a reminder for me that this is a key part
Building historic windows, how much of a difference in heat gain (window faces sun in later afternoon until sunset) between single pane and a double glaze with 1/4" spacer (1/2 total)?
The rough estimate is 50% but a 1/4" space you will be less.
I was told and read that Argon leaks out eventually, is the performance Vs cost and eventual loss of performance worth it ?
It does!
I am curious to know if the foam superspacer would seriously degrade from constant sun light?
superspacer less than some other foam or non-metallic spacers, but more susceptible to UV or solar heat degradation than metallic or hybrid spacer syetems.
What's the smoke blowing device you use to test airseal called ?
I had to buy a DJ smoke machine for that 😅 But I do not recommend it, to blows too hard and the smoke is not dense enough
How much more energy exactly is transmitted through the aluminum spacer compared to the foam spacer? I can't believe the difference is significant enough, to sacrifice the stability of a metal spacer in favor of a cheaper foam. Also, a typical house has so much air leakage in various places that a window spacer isn't going to matter. (Or so I believe, in absence of real numbers from you. Surely, window companies create hype to sell their product, and my aluminum frames are pretty horrible and sweat sometimes, but I need to see numbers before I take so much risk and expense). Such as:, if I maintain 25C inside and it's -10 outside, and I replace a 1 sq m window, how much kWh I'm going to save?
Let's look at the Spacer system effective conductivity. AL spacers range between 2-7.8 W/mK; Steel spacers range between 1.6-3 W/mK and Foam spacers 0.2-0.7 W/mk.
Some more advanced stainless Steel spacers can achieve system effective conductivity as low as foam spacers. However, they are still much more expensive at this point in time.
A detailed research report can be found at eta-publications.lbl.gov/sites/default/files/6122e.pdf.
The difference in spacers is more of a concern in a severe climate than a mild climate, some foam and other non-metallic spacers being prone to degradation due to UV exposure and/or high heat conditions within the IG space.
Aluminum is older, more or less obsolete, technology when used as a spacer. Thin wall stainless steel spacers come very close to matching the energy performance of the non-metallics with better longevity and durability.
Why is this not the most watched video on windows?
More comments, will help drive the algorithm. 😉
European style doors and windows are superior products. They have nailed the glazing and the sealing systems.
European glazing systems are in no way superior to North American glazing systems, but European frames tend to be thicker and more robust for generally better air infiltration performance.
You didn't cover the topic of vacuum between the two panels instead of argon etc.
vacuum glass is not commonly used in Australia. Personally, I am not a big fan of vacuum glass for general purposes for a few reasons:
1. similar to krypton, the optimal spacing will lead to a substantial reduction in performance when the product ages and leaks.
2. vacuum glass is more prone to bending compares to gas-filled DGU due to the pressure difference. especially for larger glass panes.
3. vacuum glass aged faster than inert gas-filled glass due to the pressure at the seal.
for a window system that has multiple layers, having some vacuum layer(s) is good because we need to squeeze every bit of performance out of the system.
What about CO2 filled windows in cold climates?
You are using double glazed only? In europe triple glazed is standard now.
where are the passive house windows? that are the only window we need in Australia ........
the australian u-value is the US u-value;
therefore German 1.2W/m2K x 1.1 (factor to compare) = Australian U-value full window 1.32 W/m2K
do you have a window with that u-value?
Ultimately, I agree, all windows for habitable buildings should be passive house quality, provided they are affordable. It is like I would love to drive the latest model-s but my bank account said a very firm "NO!!" to me. Plus, we don't sell windows or glazing units.
@@josephcheung3964 we need to build up same factory, as they have in Europe, than it is very cheap ........ we need to take out the big profit margins; without doing some things to the products (in Canberra i was finding; 20%, 30%, 40%, and more; builders put this margin on top of the trades subcontractors price; plumbing, electrians, kitchens, etc. .... we need to charge only the real hours used to manufacture and supply products .....
What's that black stuff between the glazing?
The spacer?
Does anyone know how many mm is ideal for noise reduction on a double paned??
The wider the better, I’d say.
@@ecoevo would 6mm work,?
@@hfhgfe no, 16mm plus
I would look at 25mm or more space for sound reduction, but that width will also negatively affect energy performance.
That's where triple panes offer an advantage. A triple pane with two 12.5mm airspaces would result in 25mm overall airspace - good for sound reduction (especially using different thickness glass for the center lite), while the two separate 12.5mm airspaces are individually perfect width for energy performance.
So basically, I know absolutely nothing about windows. Well, I guess I’ll be spending the rest of my night learning what I can.
I don't quite understand about the argon and crypto thing? Does it mean these gases are already placed inside the glass? Or these gases are inside the glazing film?
Oh I understand now. The window have two glass that are placed distant with each other where in the gap gas are placed wether it's normal gas, argon gas or crypton gas. Very informative sir😍
Guys Heres what it looks like the use of gas in-between glass
ruclips.net/video/vTPBxxu4O5k/видео.html
But there is a triple glazing too , which is even better.
triple glazing is right thing
3/4 of you would fall asleep 😂
Why are you talking about wendows?
glass in neither a liguid or solid it is amorphous soild this is why when glass is removed from buildings that is hundrens of years old it is thicker at the bottom than the top.
this is all doen to gravity.
for all you geeks out there
amorphous solid the atoms and molecules are not organized in a definite lattice unlike say steel ect
Walk to pub
If you want something even better than gas in your windows, then you should look into vacuum sealed glass, no gas means no convection and the r value is immensely boosted. In addition low-e is a scam, ceramic coating does a far better job than low e glass. You can buy a ceramic tint and slap that on your windows the same as the ones people use on cars and you will get far greater ir insulation than low-e. The window industry overall has pretty BS and overpriced technology
Vacuum sealing doesn't even exist outside of experimental companies. Ceramic film is a separate expense and very costly compared to Lowe/Argon.
Talk too slow
This may change your life. www.howtogeek.com/702364/how-to-speed-up-youtubes-playback-speed-or-slow-it-down/amp/
Is every window film suitable to double glazing windows for heat isolation?
We have a video, that we are editing now, as a follow up video to this one. ☺️
Thanks for this full explanation about double glazing windows 👍
Very informative, thank you so much.