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About JohnW

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  1. Thanks @pocster, do you know how many Square Metres that was for?
  2. @pocster your cladding looks first class, can you tell me what product you used and a rough idea of cost please?
  3. Thanks @Mr Punter, we haven't ruled out board & skim, I'm just afraid the edges of the opening will crack & discolour and was wondering if there's a better way that I'm not aware of. The back-boxes are due to my pet hate of extension cables and adapters!! We've had 2 adapters get fried in previous houses from being overloaded, so, better looking at them...
  4. Our room sealed Element 4 Modore 75h gas fire was installed yesterday and we're planning to board & skim the fake chimney breast to finish it similar to the photo below. The temperature from the front of the fire can get up to 200 degrees Celsius. Can anyone suggest how best to finish the opening so it won't crack or discolour around the edges please?
  5. JohnW

    White walls in garden

    Thanks for the photos, looks great @Declan52...when are you free to come down to do mine 😉 P.S. Who golfs with a hurley stick?
  6. JohnW

    White walls in garden

    @Declan52, I'm trying to decide on rendered garden walls & raised planters very similar to the image in your original post above. What did you finally decide on, render or timber? If it was render, what did you go with and how has it survived it's first winter? (also I'd love to see a picture of the finished product if you have one) Thanks
  7. JohnW

    UFH loop design help

    I've been wrestling with Loopcad for sometime now and am loosing the will to live. I take 1 step forward only to follow it with 2 steps back!! Are there any kind souls out there who are proficient in using Loopcad who could help with my loop design for the ground floor and save me from tearing the rest of my hair out? I'm trying to use spiral counter-flow where possible. Here are 2 versions of the GF plan, one with dimensions and one without.
  8. I plan to use electric UFH in my first floor bathrooms. They will have the following buildup; Tile Electric UFH 75mm sand & cement screed 50mm insulation 150mm hollow core slab We also have towel radiators which will provide the majority of heat and we plan to use the UFH to warm the tiles for comfort. Presumably some of the heat generated will head down into the screed rather than up into the tiles above. Should I put anything between the screed and the UFH to force the heat up and if so, what?
  9. @Alphonsox are you happy with your Warmstar electric UFH? Would you recommend it?
  10. JohnW

    Radiator sizing

    Thanks @PeterW are you suggesting I use the spreadsheet to calculate the whole house heat loss and then if a rooms volume is 10% of the whole house volume then the heat loss for that room will be 10% of the total heat loss?
  11. JohnW

    Radiator sizing

    Just trying to resurrect this thread - I can't find an online radiator sizing calculator that accounts for triple glazed windows or really well insulated walls, floors & roof. Does anyone know of a reliable one that does?
  12. Hi We have been asked if we would consider using "Thermal Bead Screed" on the ground floor, it's an Italian product, real name Politerm Blu 110. It appears to be a lightweight screed with insulation beads used as aggregate. My original ground floor build-up gives me a respectable U-Value of 0.14 and is as follows; 100mm Sand & cement screed with UFH pipes embedded 3mm Polythene 125mm Thermafloor TF70 insulation boards with hot & cold water pipes embedded 3mm Raydon barrier 150mm dense concrete sub-floor The key to reaching the U-Value of 0.14 is that the boards are installed correctly without gaps or voids. The "Thermal Bead Screed" approach appears to remove the risk of gaps & voids and the floor build-up is as follows; 50mm Liquid Hemihydrate screed with UFH pipes embedded 3mm Polythene 175mm "Thermal Bead Screed" with hot & cold water pipes embedded 3mm Raydon barrier 150mm dense concrete sub-floor This won't give me as good a U-Value, I've been told 0.16 by the company selling it to me and 0.18 by an independent energy assessor. Have any of you used "Thermal Bead Screed" or know anything about it?
  13. JohnW

    Importing lights from China

    @Dudda Can you tell me where you sourced the replicas from please?
  14. Thanks @JSHarris - I've been playing with your fabulous spreadsheet (never thought I'd ever use those 2 words together) for some time now and it appears that changing the floor U-Value doesn't have a very big impact on the overall results. I tried Floor U-Values of 0.14, 0.18 and a Regs matching 0.25 for comparison and the results are shown below; What surprised me most, apart from the low values, was that the adjusted July & August figures appear to show the house over-heating more with a U-value of 0.25 than at 0.14 or 0.18. Can you confirm that this is what you would expect?
  15. I know the lower U-value I achieve for my ground floor the better but is there a maximum U-value beyond which under floor heating is not advisable?