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Insulating a conservatory roof

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  • 04-06-2024 10:13am
    #1
    bungaro79
    Registered Users Posts: 1,213 ✭✭✭


    Hi all

    our house came with this extension onto it when we bought it several years ago. It is a lovely space but in the winter it is freezing out there! We are pretty sure there is zero insulation between those wooden panels and the tiles on the roof of it. What would be the best, and economical, way of sorting this? Could we get insulating plasterboard and get someone to fit these on the panels (and get the lights dropped)?? Its a pretty high ceiling so losing a few inches wouldn't make a difference at all.

    Thanks

    PXL_20240604_063815428.jpg



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    #2
    MicktheMan
    Registered Users Posts: 2,837 ✭✭✭MicktheMan


    There are at least 3 issues at play which need to be considered here.

    1. Room shape / type: Because the room juts out from the side of the original house, 5, if not all 6 sides of the room are heat loss elements (ceiling/roof, floor and 3 if not all 4 walls). This results in a far higher rate of heat loss per useable square metre of floor. Therefore, all else being equal, this room would need significantly more heat input per sqm than the rest of the house just to have similar temperatures
    2. Cold radiation from the glazing will make even a heated room feel cold and uncomfortable. Using the curtains or blinds will help this somewhat but ultimately upgrading the glazing quality (u value at or better than 0.8 w/mk) will eliminate this effect.
    3. That ceiling likely suffers excessive heat loss by air leakage even if insulation is installed above the timber paneling. Adding (more) insulation won't make much of a difference if the air tightness bit isn't addressed. This can be achieved by including properly specified air tightness membrane / tapes etc as part of the remedial works (imagine turning the room upside down and being able to fill the vaulted ceiling with water with none leaking out!)



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    #3
    bungaro79
    Registered Users Posts: 1,213 ✭✭✭bungaro79


    https://www.boards.ie/discussion/comment/122219930#Comment_122219930

    Thanks Mick. Some interesting points there to consider before we do anything. There is a membrane under the floor (which we replaced last year) and the walls were pumped soon after we moved in. I've a guy coming this week to check the windows so I'll mention to him about checking the u value. The roof would need tape or membrane for sure as you can see gaps when you go up close to it.



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