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Retrofit underfloor heating question

  • 10-12-2024 12:54PM
    #1
    martinmcfly
    Registered Users, Registered Users 2 Posts: 1 ✭


    Hi All

    quick question regarding a new system I got installed. It is a retrofit system from a reputable company. The subfloors are uninsulated slab concrete. The system is routed insulated panels with a metal spread plate on top. The builder put 1/2inch osb ontop of the metal plates then 8mm laminate flooring on top of that.

    The heat from the system feels barely adequate. Struggles to get a room over 21 degrees and less if its a cold day. That’s with it running after several hours already (4-5hrs and running longer doesn’t make it any warmer. The house is newly insulated with triple glazing. (B3 rated or so). New oil condensing boiler to run it all.

    My question is the OSB. Is that’s what blocking the heat from rising? Feels a little silly to put osb down then laminate as wood is a decent insulator.

    Any help or guidance would be much appreciated. I don’t really know what to expect from the system but feel a bit underwhelmed so far as I’m burning through oil with not a lot of heat.

    Thanks



Comments

  • #2
    cnocbui
    Registered Users, Registered Users 2 Posts: 21,053 ✭✭✭✭cnocbui


    If you inject heat into something, it won't be lost, but can possibly be delayed. I doubt the OSB would be an issue, the heat going down into the slab and the cold ground below that might be the issue.



  • #3
    Wearb
    Moderators, Home & Garden Moderators Posts: 6,553 Mod ✭✭✭✭Wearb


    You need lots of insulation beneath underfloor heating.

    If you know other plumbers or builders, ask them for their thoughts.

    You could possibly add a radiator to complement your setup for the cooler days, or a cheap electric heater.

    You probably don't want either of those options, if so go with my first suggestion.

    B3 rating and triple glazing....where did assessor say you were loosing heat?



  • #4
    10-10-20
    Registered Users, Registered Users 2, Paid Member Posts: 9,166 ✭✭✭10-10-20


    Do you have the spec or brochure of the "routed insulated panels"?



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