Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

Building Regs - Percentage Glazing

  • 16-05-2007 5:05pm
    #1
    Calluna
    Closed Accounts Posts: 102 ✭✭


    Hi, I just had a quick question that someone might be able to help with...
    For a concrete built house (cavity wall) there's a specific amount of glazing (percentage I think?) that is allowable on any one wall....for structural reasons. Would anyone have any idea what that might be?

    Not sure if that makes sense....here's the scenario. We are designing a south facing kitchen and have a double door onto patio (2.4m wide) and one window (1.0m wide) on a wall that's 8 metres long in total. I'm wondering if I can add another window without having structural issues. I know engineer mentioned it before, but he's on hols and I'm just playing around with designs. It's mainly from a structural point of view I'm asking, but if anyone has any advice from a solar gain perspective...that would be useful too....

    Door would be standard height and the 1 metre window would be above counter height. Would I be restricted in total size of new window, or is it based on the 'width' rather than glazed area?

    thanks in advance


Comments

  • #2
    Mellor
    Registered Users, Registered Users 2 Posts: 40,232 ✭✭✭✭Mellor


    Yeah your right, its covered in the regs, in two places,
    part L covers the required U-value and maximun area, dependant on the shape of the house

    and part A deals with size of openings, frequency and size,

    both can be found here www.environ.ie


  • #3
    Calluna
    Closed Accounts Posts: 102 ✭✭Calluna


    Thanks a million Mellor - just what I wanted.
    In short - sum of the openings should not exceed two thirds the overall length of the wall, but there is also guidance as to the width of the 'non openings'. I think I can add another window.
    Another interesting point is that none of the openings should exceed 3 metres.
    Have to wade through Part L but Part A was what I was looking for initially.


  • #4
    muffler
    Registered Users, Registered Users 2 Posts: 46,717 ✭✭✭✭muffler


    If the wall is 8.00 metres long and is supported at both ends then you can have openings in blockwork up to a total width of 5.30 with standard construction. Like a lot of things there are conditions and as Mellor pointed out you need to check out the building regs.

    Natural light (glazing) is 10% minimum of floor area of room


  • #5
    Mellor
    Registered Users, Registered Users 2 Posts: 40,232 ✭✭✭✭Mellor


    Calluna wrote:
    Another interesting point is that none of the openings should exceed 3 metres.
    Part L is mostly, max glazing as a percentage of Glazing, also u-value considered, its not structural, but its worth considering at this stage, but any scheme you come up with can be accomdated, in terms of part L, by adjusting the U value.

    3 Metres is a big window. Where you planning on going higher than this? And in my opinion a series of smaller windows can look far better. Wade through the building regs and feel free to thrash ideas out here.
    Mellor


Advertisement