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Alternative to Kingspan TP10

  • 19-01-2011 02:13PM
    #1
    LowOdour
    Registered Users, Registered Users 2 Posts: 2,656 ✭✭✭


    I had planned to use 100mm kingpsan tp10 between roof rafters and then use 37.5mm TW56 insulated board underneath to give a uvalue of 0.20 w/mk2.
    The TP10 is fairly expensive, so might have to looking into putting a fiberglass alternative. Can anyone suggest anything that would give a decent enough u-value, but not as expensive


Comments

  • #2
    galwaytt
    Registered Users, Registered Users 2 Posts: 12,754 ✭✭✭✭galwaytt


    Two thoughts:

    1. TP10 needs to be fitted well, and tightly - no point in big gaps. If you seal edges with sealant/tape it's much better.
    2. Fibreglass will 'pack down' over the life of the building, and so diminish in effectiveness.............and, there is a theory that, as loose-fill, that it's effective u-value, due to air movement within, at low temps, is low.

    Me, for roof's, I'd go for rigid insulation (of whatever type), well fitted, every time. You only get 1 chance to insulate properly, so do it now. Buyer's Remorse is a terrible thing.......

    Ode To The Motorist

    “And my existence, while grotesque and incomprehensible to you, generates funds to the exchequer. You don't want to acknowledge that as truth because, deep down in places you don't talk about at the Green Party, you want me on that road, you need me on that road. We use words like freedom, enjoyment, sport and community. We use these words as the backbone of a life spent instilling those values in our families and loved ones. You use them as a punch line. I have neither the time nor the inclination to explain myself to a man who rises and sleeps under the tax revenue and the very freedom to spend it that I provide, and then questions the manner in which I provide it. I would rather you just said "thank you" and went on your way. Otherwise I suggest you pick up a bus pass and get the ********* ********* off the road” 



  • #3
    LowOdour
    Registered Users, Registered Users 2 Posts: 2,656 ✭✭✭LowOdour


    I agree with your sentiments. At the moment im thinking i'll fit the TP10 just into the bedrooms and leave office, bathroom and hall with out it.
    What kind of sealant/tape would you recommend for it?


  • #4
    galwaytt
    Registered Users, Registered Users 2 Posts: 12,754 ✭✭✭✭galwaytt


    Tbh, I wouldn't leave them out - esp not a bathroom. As for myself, having worked from home in an upstairs office in a dormer, I wouldn't leave it out there, either.

    Which leaves the hall. No point in having one big cold space in your house - all your heat will migrate towards it.........

    For sealant, I'd use a non-setting polyurethane or similar, and for tape, well any of the proprietary ones on the market: Airstop, Ciga, Intello,...I'm sure there's others, someone else might chime in on that......

    I presume you're putting airtightness membrane under the rafters, before putting on the TW56 board ?

    Ode To The Motorist

    “And my existence, while grotesque and incomprehensible to you, generates funds to the exchequer. You don't want to acknowledge that as truth because, deep down in places you don't talk about at the Green Party, you want me on that road, you need me on that road. We use words like freedom, enjoyment, sport and community. We use these words as the backbone of a life spent instilling those values in our families and loved ones. You use them as a punch line. I have neither the time nor the inclination to explain myself to a man who rises and sleeps under the tax revenue and the very freedom to spend it that I provide, and then questions the manner in which I provide it. I would rather you just said "thank you" and went on your way. Otherwise I suggest you pick up a bus pass and get the ********* ********* off the road” 



  • #5
    LowOdour
    Registered Users, Registered Users 2 Posts: 2,656 ✭✭✭LowOdour


    galwaytt wrote: »
    I presume you're putting airtightness membrane under the rafters, before putting on the TW56 board ?

    Eh, its not something I knew about to be honest. Wasnt mentioned to me when I got the spec for the roof/ceiling insulation


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