DG unit - which side has frosted glass?

I've just had some new windows and doors fitted, with the bathroom windows and back door having frosted glass. The units have plain glass on one side and frosted on the other.
I've just noticed that they've been fitted differently - the bathroom window has the plain glass to the inside and the frosted to the outside, whilst the back door has it the other way around. Is there a correct way to fit these? It looks a little odd to have the plain glass on the inside due to the way it reflects (but that may just be me!).

Thanks in advance for any advice.:)
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Replies

  • Some double glazed units have different kinds of glass in the two panes, or different coatings on the glass. Then it's important to get the right pane on the outside. If the glass is the same it doesn't matter which way around the unit is installed. At least, it doesn't matter from an energy usage point of view. Ideally, you don't want the uneven surface on the outside. In the unlikely event that a snooper wanted to see through the window, they could pour a thick liquid over the window, which cancels out the frosting. There are actually four surfaces if you think about it - outside, the two internals, then inside. As long as the uneven surface isn't on the outside you are okay.
  • ormusormus Forumite
    42.7K Posts
    i always fit the plain glass on the inside.
    just a personal thing.
    Get some gorm.
  • mvtengmvteng Forumite
    508 Posts
    Part of the Furniture 100 Posts
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    In our bathroom, plain glass on the outside, frosted glass on the inside.

    Been in for 10 years & todays the first time I've ever noticed they are different.
  • har0ldhar0ld Forumite
    108 Posts
    Normal practice is to put patterned/frosted glass to the inside.
  • moleratmolerat Forumite
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    Part of the Furniture 10,000 Posts Name Dropper Photogenic
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    If low e glass the frosted pane goes on the outside smooth side out, the flat glass inside with the coated surface on the inside of the sealed unit. The old way with normal glass was frosted inside.
  • icic Forumite
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    Part of the Furniture 1,000 Posts Name Dropper Mortgage-free Glee!
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    I would have thought the smooth side should go on the outside, otherwise the patterned surface will surely hold more dirt than the smooth side ever would?
  • Your new units, if up to current spec., should be K glass . This glass usually has stickers showing "this side inside" or similar. The installers obviously should have followed this instruction and therefore they should be the right way around. Did you get building regs approval which should mean that they are properly fitted?
    Forgotten but not gone.
  • moleratmolerat Forumite
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    ic wrote: »
    I would have thought the smooth side should go on the outside, otherwise the patterned surface will surely hold more dirt than the smooth side ever would?
    Modern patterned glass is only nobbly on one side, that goes towards the inside of the sealed unit.
  • My frosted glass was fitted inward facing, by this I mean the frosted area was in the sealed bit of the double glazing, so that the internal and external sides of glass were both smooth. They are K glass.
  • har0ld wrote: »
    Normal practice is to put patterned/frosted glass to the inside.


    Not if the glass unit is to comply with Part L of regulations.

    Obscure glass on the outside of unit ( smoothest side faces outside). Low E or Soft coat clear glass on the inside of the unit ( treated side of the glass faces outside so the coating on the glass is protected).

    Like others have said each unit should have a sticker on which says:

    "This unit complies with Part L of building regulaions , This side must face inside".
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