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  1. J

    EPC calculation algorithm. Anyone know what it is ?

    I am a landlord. I am very hands on with a Good working knowledge of engineering as well as trade skills (I am a qualified electrician and plasterer amongst other things), with a good science background and a couple of patents. But EPCs seem to be beyond me. Lol I understand.how to calculate...
  2. J

    Enormous Hawks-20 x 16 inch anyone know of a supplier ?

    I plaster competently. I prefer using large floats (where I can) my favourites are 16, 18 and 20 inch marshalltowns. But I can't find a large hawk to lay on with a 16 or 18 inch easily. My current (nice!) hawk is a 14 inch magnesium marshalltown, but it feels very small and restrictive (I...
  3. J

    Lead window tray and bottom fixing detail for Upvc window into timber frame…

    I’m putting in some triple glazed Upvc windows - 2.4 metres wide into our new dormer room - Which is timber frame, sheathed in OSB, tyvek, battens and plastic cladding. My building surveyor says building control will expect a lead window tray , to create a flashing over the cladding under the...
  4. J

    Upvc window bottom mechanical fixings through lead window tray?

    I’m putting in some triple glazed Upvc windows - 2.4 metres wide into our new dormer room - Which is timber frame, sheathed in OSB, tyvek, battens and plastic cladding. My building surveyor says building control will expect a lead window tray , to create a flashing over the cladding under the...
  5. J

    Thermostat fr underfloor heating with high thermal inertia

    Hi! I am trying to find a thermostat for my underfloor heating (which is all electic--- wires set in a screed), which I put in the house years ago in a refurb. Lots of insulation under it, and I like it, but never found a thermostat that appears suitable. The screed means it takes some hours to...
  6. J

    HW Immersion element are flexibles available frawkward space

    I'm wanting to fit an immersion element to an existing domestic copper HW cylinder, which some idiot plumbed in 15 years ago, not thinking that the immersion boss might get used in the future. They plumbed it so it is awkward to get to, and in fact a combination of the cupboard and pipes will...
  7. J

    Wetroom floor membrane: can you get wide seemless sheets ?

    A wet room i'm doing in a first floor room of a victorian house in Kent in the UK. The floor is going to be 22mm ply on wooden joists --stengethened so as per the TRADA table to control movement. We'll probably use Marmox wall boards , to be tiled. The shower will be in a corner with a single...
  8. J

    Wetroom floor membrane supplier of seemless large sheets ?

    Wetroom floor membrane: can you get wide seemless sheets e.g. 4m x 4m ? A wet room i'm doing in a first floor room of a victorian house in Kent in the UK. The floor is going to be 22mm screwed and glued ply on wooden joists --stengethened so as per the TRADA table to control movement. We'll...
  9. J

    design derating for cables going through kingspan/celotex

    Hi! I have a problem with derating factors for cables going through phenolic thermal iinsulation: I have been wrestling with my 17th edition: I am rewiring a house with 17century solid brick walls (no cavity). We are refurbing it, (electively), and want to hit refurb U values for heat...
  10. J

    Gloworm space saver 40F manual circa 1987 anyone got one?

    I have a Glowoworm Sapce Saver 40F : and the gas valve has the date 1987 on it. Iwas trying to get hold of a manual for my service guys: as when things get sticky having a technical manual around can often help e.g. with wiring diagrams. As it turns out since I originally posted this...
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