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Glazing In Older Properties.


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#1 joiner

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Posted 19 October 2013 - 08:23 AM

http://www.historic-...techpaper19.pdf

http://www.historic-...cal-paper20.pdf

Thanks to 'worms' on the PPUK forum. ;)

#2 joiner

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Posted 19 October 2013 - 08:29 AM

http://www.branz.co....aa7a9c02c573040

http://www.english-h.../eehb-partl.pdf

#3 caliwag

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Posted 19 October 2013 - 11:53 AM

Interesting docs there Dave.

It's a shame, in the EH one, that they don't give more detail about the buildings.
On page 8 the former factory/warehouse appears to be refurbed with Crittal steel windows (or similar...other's are probably available!)
But I assume they are double glazed (Spacia, or similar!!)but frankly it would appear to be the only solution. I'd like to know more
about the building, and many of the others.

However thanks for posting...the draft-proofing detailing is useful.

#4 joiner

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Posted 19 October 2013 - 12:41 PM

Heritage Scotland seem to be ahead of English Heritage in the extent of the research undertaken in this sector. Maybe because Scottish academic institutions are keener to get involved?

The CICStart webinars I used to post about...

http://www.cicstart.org/

...were also active in promoting built-environment research (viz energy efficiency, actively involving social housing providers) by Scottish universities, who seem far more involved in such work than English institutions.

Edited by joiner, 19 October 2013 - 12:42 PM.


#5 sarahsouthwest

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Posted 30 May 2014 - 05:31 PM

There's also this report, again in Edinburgh done for Historic Scotland/National Trust http://www.changewor...works_2010).pdf

All our local glazing/joinery companies offered only duplex glass, ie a big sheet of double glazed glass with fake glazing bars rather than each individual pane being a separate unit within the window which was what we wanted - as you can see from the chapel pic, we've got Georgian 6x6 windows, which are about our only period feature so we wanted to get them right.

After much umming and ahhing we've chosen to use Slenderglaze (who came 2nd in the tests after Pilkington's) partly because they were local-ish (Bath) but also because they were prepared to discuss glazing for hours. The local quotes for duplex came in about the same as Slenderglaze. We have chosen a 6mm gap rather than a 4mm gap for better U values, and a white rather than black spacer bar (tricky choice, a lot of heritage places choose black, but it looked more noticeable to us). Due on site in about 3 weeks time, will feed back then if we made the right choice.

#6 joiner

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Posted 30 May 2014 - 05:56 PM

Sarah, are they gas-filled?

There is a bit of a debate, still, about the merits of white/black spacer bars. It seems to be a personal preference thing, although if the job is being done under a CO then they'll be doing the specifying anyway, and there's no consistency there! I've always gone for white because I still reckon they're the least obvious in an indirect sight-line, and certainly least obvious when the window is viewed side-on. All, of course, depending on the window being painted white. ;)

Although I have to say that Duplex has its advantages when used on a 6/6 because that's the only way you're going to get glazing bars down to 13mm, as here...

Attached File  FRONT BEDROOM WINDOW - DUPLEX BAR 001.jpg   34.02K   1 downloads

#7 sarahsouthwest

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Posted 30 May 2014 - 06:08 PM

Drat - it's gas, but I can't remember off the top of my head if it's argon or krypton. We took out one of the old sashes and the company is reproducing it exactly, down to having a new router (jig?) cut to get the glazing bars profile more or less exactly right - there's obv a compromise with the depth to accommodate the extra glass and the spacer. Luckily the existing ones are 21mm wide, so the width is less of a problem. 13mm is tiny.

BTW I've forgotten how to put pics in - a quick reminder would be appreciated...

#8 joiner

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Posted 30 May 2014 - 09:49 PM

Use the "More Reply Options" down there on the right in the FULL editor. You'll see the facility for adding pics.

If you get frustrated waiting for that to upload, then use tinypic...

http://es.tinypic.com/

Copy and paste link on there straight to any page, even the quick edit. ;)

#9 temp

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Posted 31 May 2014 - 02:42 PM

For awhile it looked like we might need Krypton gas filled units in some windows. I found it hard to find a company that had any locally. They were all happy to use it but wanted me to pay for a whole cylinder which would have been expensive for the small quantity needed. In the end we opted for a different design that didn't need it.

#10 joiner

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Posted 31 May 2014 - 03:39 PM

With a gap that small (6mm) they couldn't get the gas in unless their gassing process involved the gas chamber we've discussed elsewhere. It's why I had to go from (air) 14mm spacer to (gas) 16mm because drilling the filling hole wrecked too many spacers. :(

#11 sarahsouthwest

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Posted 02 June 2014 - 07:30 PM

And that's why it's costing us £££...

#12 joiner

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Posted 02 June 2014 - 08:39 PM

:)