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Wall Vents and window trickle vents

  • 26-09-2014 11:58am
    #1
    ALMAG
    Registered Users, Registered Users 2 Posts: 13 ✭


    I've searched through a few posts here to find an answer and also looked at Part F & J of Building Regs. I'm having difficulty with some of the terminology in the building regs.

    My problem is this- My house was built in 2006 and has 150mm wall vents in each room and also trickle vents in all windows. There are also extract fans in the 2 bathrooms.

    The wall vents were never ducted and are just a big hole in the blockwork with a grill either side which is creating big drafts.

    I intend to block all the wall vents with insulation/foam and rely solely on the window vents.
    Am I OK to do this?
    The rooms I'm most worried about are the-
    The sitting room (4mx3m) has a gas fire and 2 trickle vents in the bay window as well as the wall vent.
    The kitchen/diner (7m x 5m) has a gas hob, gas boiler non ducted extractor fan and 3 trickle
    vents in sliding door & window as well as 1 x wall vent.

    Appreciate any advice.


Comments

  • #2
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,146 Mod ✭✭✭✭BryanF


    Just put the pipes through the openings. And ty that for a while. Don't block them up. Next option would be a vent with gust excluder (sorry there'll be a better name for that) next if that's still a problem consider demand control vents with RH sensor. But don't go blocking the vents.


  • #3
    ALMAG
    Registered Users, Registered Users 2 Posts: 13 ✭ALMAG


    Thanks for that Bryan.

    Yes that was the first thing I thought of. It would be very difficult though!. The grill on the outside is cemented into the blockwork and is a different size and shape (rectangular) to the internal grill (square).

    Also, even if I get it out, the outside grill doesn't have a collar to attach say a circular ducting too.
    They didn't core the hole either, just used the cavity and smashed through the plasterboard,

    Its a bit of a mess!.. The houses were done by a big developer/builder who are still going. I'd name them but I'm sure its against the rules.

    To do it right I'd need new compatible vents inside and out and to make good on the plasterboard and external blockwork.

    I'm considering doing that work for the kitchen(gas boiler) and sitting room(gas fire) only.

    In the bedrooms would I be OK to block the wall vents and just use the window trickle vents instead?


  • #4
    cerastes
    Closed Accounts Posts: 3,601 ✭✭✭cerastes


    Your vents sound like mine, just hacked out.
    Cant be seen from the inside or outside, but dust comes from them from time to time as its just blocks cut.
    I put an extendable rectangular cross sectioned duct into the one in the living room, it has some grilles/baffles, looks like to slow air movement in/out.

    Really I was wondering if there is a duct, with an open/close feature thats sensor operated that could be slotted in to existing "Irish" room ventilation ducts.
    I was thinking of using the hole for the bathroom/ensuite ventilation to fit an extractor fan, this seems to be the same as blocking up a vent though?
    I dont know, but think probably not allowed under Irish building regulations to have something blocking up a vent duct, either remotely, by sensor especially in a room with a Gas fire/boiler/hob.


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