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Insulating porch

  • 19-02-2026 12:15PM
    #1
    aldub83
    Registered Users, Registered Users 2 Posts: 61 ✭✭


    IMG_5864.jpeg

    hi anyone any advice? My porch runs over half the front of the house across the small entrance at front door and over 1/4 of the the play room at front right of house. Picked roof type not insulated. Very cold.The ceiling is wooden at the front door part so can remove for access. Not sure whether to use wool in the rafters or spray foam possibly.

    Anyone see any issues or has anyone successfully done this before?



Comments

  • #2
    10-10-20
    Registered Users, Registered Users 2, Paid Member Posts: 10,141 ✭✭✭✭10-10-20


    Porches can be complicated and can have unexpected cold bridges and a non-optimal layout in terms of minimising the heat-loss. Can you post photos of it showing the exterior at least?



  • #3
    aldub83
    Registered Users, Registered Users 2 Posts: 61 ✭✭aldub83


    photo added



  • #4
    loyatemu
    Registered Users, Registered Users 2, Paid Member Posts: 16,438 ✭✭✭✭loyatemu


    we have a similar arrangement at the front of our house and I long suspected the roof of being responsible for it being cold. Until I got an IR thermometer and measured the temp of the ceiling and found them no colder than the ceilings in the rest of the rooms, so I'm guessing there is some insulation in there.

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  • #5
    10-10-20
    Registered Users, Registered Users 2, Paid Member Posts: 10,141 ✭✭✭✭10-10-20


    That roof is a prime candidate for glasswool between the joists, for sure. I'd top it up with 300mm - probably only around 200EUR - and I'd make sure to ram the insulation as far as I could into the corners of the roof structure as those are very difficult to insulate otherwise.

    One thing that you mentioned was that the ceiling was wood at the door. If it's just wood without any plasterboard then I'd be looking to replace that with plasterboard - or seal it all up with a vapour and air-tight membrane and put the wood back on. Of course you'll have to do that in some order to allow you to retain the insulation above the membrane, but it can be done!

    One thing that I'd also do it seal up any and every wiring hole in the ceiling, and especially around downlighters - which I would swap out for sealed LED types instead of any incandescent types.



  • #6
    aldub83
    Registered Users, Registered Users 2 Posts: 61 ✭✭aldub83


    thanks for that. Yeah great advice there that sounds all doable. Wouldn’t have known about the membrane at the wood myself. I’ll be doing that so



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