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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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    • CommentAuthortony
    • CommentTimeDec 23rd 2014 edited
     
    It was very nice to see a high quality low energy window being advertised in conjunction with a check reveal. (sorry badly written first time)

    We have been building checked reveals for ages, are we as an industry ready for change?
  1.  
    Say what now?:tongue:
    • CommentAuthorJeff B
    • CommentTimeDec 23rd 2014
     
    ? :confused:
    • CommentAuthortony
    • CommentTimeDec 23rd 2014
     
    Anyone even know what a checked reveal is then?
  2.  
    Perhaps you should edit that first sentence Tony - even allowing for your abbreviated style, it is gibberish as is. And unless you are trying to make me (and therefore I guess others) feel small, a dia would be nice too.
    • CommentAuthorMackers
    • CommentTimeDec 23rd 2014
     
    Spill the beans, obviously others and myself have never heard of this
    • CommentAuthorTimber
    • CommentTimeDec 23rd 2014
     
    Check reveal, as I understand it, is where the windows are placed behind the outer brick or block skin. The frame sits on the cavity face of the outer cladding rather than within the opening in the cladding layer.

    Not sure what any of that has to do with anything, mind you.
    • CommentAuthorslidersx200
    • CommentTimeDec 24th 2014 edited
     
    My definition of a check reveal is the result of building an external opening that is smaller than the outer dimensions of the window frame, so that the frame sits partly behind the external skin. This removes the direct path for wind and penetrating rain to bypass the window frame and subject to material choices, can improve the installation psi value (reduce thermal bridging).

    Unfortunately however, Yoda was unavailable to translate what context the original inspiration for this topic was.
    • CommentAuthortony
    • CommentTimeDec 24th 2014
     
    Great definition, why aren't all windows built like that?
    •  
      CommentAuthorjoe90
    • CommentTimeDec 24th 2014
     
    I like the check reveal idea and plan to do this with my build, also inner blockwork 200mm short to allow me to build angled reveals to allow more light and look more cottagy.
  3.  
    Posted By: tonyGreat definition, why aren't all windows built like that?


    Check reveals don't affect how the windows are made Tony or are you suggesting that windows could be adapted to more easily facilitate such an installation.

    Yours, Yoda's understudy.
  4.  
    Sliding sash windows lend themselves well to check reveals, other permeability issues aside and inward opening or tilt n turn windows should for the most part be OK.

    Outward opening casements, especially the stormproof type may open against the outer reveal if consideration to hinge motion is not given and this could have consequences relating to safe egress requirements in extreme cases. Stormproof designs may also limit the amount to which the frame can be covered, but they can offer better weather resistance in other ways.
    • CommentAuthortony
    • CommentTimeDec 24th 2014
     
    Check reveals when combined with good window design can greatly facilitate mitigation of thermal bridging. I like this aspect and better wind sealing is an additional benefit.
  5.  
    Worth remembering that windows might need to be replaced in the future, so would need to make sure they can be got out from inside without dramatic damage.
    • CommentAuthorborpin
    • CommentTimeDec 24th 2014
     
    Standard detail in Scotland. Does help thermal bridging. However, the blockwork can be returned back so that the reveal is bigger than the outer blockwork thickness. When the render went on, they put a bead around the window so a EDPM expanding foam tape seal can be fitted for weather proofing. Improves thermal bridging more as the frame is not in direct contact with outer blockwork.
    • CommentAuthorJeff B
    • CommentTimeDec 24th 2014
     
    Thanks for the clarification.
    • CommentAuthorEd Davies
    • CommentTimeDec 25th 2014
     
    Posted By: slidersx200…and inward opening or tilt n turn windows should for the most part be OK.
    Is this at least partly why these sorts of windows are popular in Germany, etc?
    • CommentAuthortony
    • CommentTimeDec 25th 2014
     
    Not really, they are more secure and in Europe external shutters are widespread, these can be closed with the windows open or shut.
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