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Double Glazing - K Glass or Planitherm?
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# 1
gundo
Old 04-08-2008, 10:27 PM
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Default Double Glazing - K Glass or Planitherm?

I'm looking at getting double glazing. Most of the quotes have specified Pilkington K glass but one guy recommends "Planitherm". He reckons the U value is better and there's less discolouration (K glass has a reputation for making nets look grubby due to a slight tinting effect). Personally I don't care re appearance I just want the best glass. Anyone know what's best? The DG guy says that Planitherm and K glass are the same price and he stresses how much better Planitherm is than K glass and that I'll regret getting K glass.
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# 2
thebaldwindowfitter
Old 04-08-2008, 11:24 PM
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planitherm does have a better u value and is made by st gobaine which is frances equivellent of pilkingtons .they also do a lot of glass for motor trade
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# 3
McAzrael
Old 05-08-2008, 7:03 AM
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I prefer Planitherm - better insulation, clear (K is blue) and cheaper. But I shouldn't obsess over it, the difference is slight.
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# 4
littlesos
Old 05-08-2008, 2:19 PM
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Quote:
Originally Posted by McAzrael View Post
I prefer Planitherm - better insulation, clear (K is blue) and cheaper. But I shouldn't obsess over it, the difference is slight.
K-glass is clear too, are you thinking of Activ-Blue, which is as the name suggests blue. Activ blue is the self-cleaning, insulating glass you find in conservatory roofs, although pilkington now make a clear version now.
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# 5
ih8stress
Old 05-08-2008, 2:41 PM
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Quote:
Originally Posted by gundo View Post
I'm looking at getting double glazing. Most of the quotes have specified Pilkington K glass but one guy recommends "Planitherm". He reckons the U value is better and there's less discolouration (K glass has a reputation for making nets look grubby due to a slight tinting effect). Personally I don't care re appearance I just want the best glass. Anyone know what's best? The DG guy says that Planitherm and K glass are the same price and he stresses how much better Planitherm is than K glass and that I'll regret getting K glass.
I am currently having trouble with the glass on a dining room window - see this thread:

http://forums.moneysavingexpert.com/....html?t=741801

I am about to check with my window fitter if the glass I have IS Pilkington K but would advise you to try and find out as much as possible for both options you have before deciding.

My fitter never mentioned this beforehand, otherwise I may have checked this forum and elsewhere earlier.

HTH
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# 6
thebaldwindowfitter
Old 05-08-2008, 8:05 PM
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k glass actually has a green tint to it .planitherm has a blue tint(very faint)
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# 7
McAzrael
Old 05-08-2008, 8:40 PM
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Quote:
Originally Posted by littlesos View Post
K-glass is clear too, are you thinking of Activ-Blue, which is as the name suggests blue. Activ blue is the self-cleaning, insulating glass you find in conservatory roofs, although pilkington now make a clear version now.
I can assure you that K glass is not clear.
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# 8
simcla
Old 05-08-2008, 10:56 PM
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Planitherm is a "softcoat", Pilkington 'K' is a "hardcoat". Softcoated glass is better at reducing heat loss, and generally offers less visual distortion than hardcoated glass. Pilkington 'K' is a "brand" in the UK where as Saint Gobain Planitherm isn't, but I would go with the Planitherm and I work for a company that installs windows. Pilkingtons make a softcoat glass, ask how much that would be in relation to Planitherm! The suppliers are not trying to pull a fast one!

Last edited by simcla; 05-08-2008 at 11:01 PM.
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