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  1. R

    dimmer terminals

    Nope, defo one L and two wavey lines with arrows through. I'll put a pic on at some point... Wired it in and it's working fine. A little buzzy if you are stood right next to the switch at half power.
  2. R

    dimmer terminals

    It's a LAP brand from Screwfix (71107). I need a twin gang, chrome, screwless to match the other fittings. Load is 14 LED downlights (5w) so I am just over min load. I'll see if I can find a better trailing edge one from somewhere...
  3. R

    dimmer terminals

    I just bought an LAP dimmer. The dimmer has 3 terminals, L and two dimmer outputs? (wavy line with arrow through, numbered 1 and 2). I assume this is for adding a second on/off switch elsewhere if required for 2 way operation? I assume for a simple single dimmer with no additional switches...
  4. R

    Cavity trays and flashing on a flat roof abutment

    I have a flat roof that abuts a vertical wall. I installed 'refurbishment' type cavity trays which are the type with no lead attached, just a clip that keeps the spacing while the motar goes off. The clips are then removed and the lead flashing goes in under the lip of the tray. So my...
  5. R

    Noise from GRP flat roof

    Sorry to resurrect this old thread, but I am researching roofing for an Orangery. Initially I was going to go with EPDM, then decided to go GPR now this has put me off GRP! I read that GRP has different expansion coefficients to the underlying OSB/Plywood and therefore it should not be bonded...
  6. R

    Warm flat roof with EPDM. Insulation options?

    Hi Richard, that makes a lot of sense, thanks. So what issues do you run into when you did your roof? I'm just weighing up the pros and cons of diy epdm vs getting a contractor in to lay a GRP roof.
  7. R

    Warm flat roof with EPDM. Insulation options?

    I have seen at least three options for building up a warm flat roof with EPDM. The composite roof deck type boards have to have additional ply/osb on top if using EPDM. I have also seen diagrams showing an additional overlay board between the PIR foam board and the EPDM. So here are the...
  8. R

    U-value of wood?

    Further investigation reveals I was talking ******! The 0.62 R value for ply is US not Metric! 12mm ply is actually 0.109 With this in mind, with two skins of 25mm ply, I would need 70mm of celotex to get to below 0.28 This would take the thickness to 120mm which is a bit wider than...
  9. R

    U-value of wood?

    I'm looking to build an upstand for a roof lantern. It will be about 300mm tall. I was going to just use joists and construct a solid 'wall' all the way around the lantern opening rather than an open trussed structure. Then I thought about possible cold bridge issues so i started looking...
  10. R

    ducting through a new slab for existing air bricks

    I'm laying a slab which butts up against two walls of our house. The existing walls form an internal corner and the new slab extends out from there. There are 4 air bricks in the original external walls so these need ducting through the slab to retain ventilation. Three of the existing air...
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  14. ducts

    ducts

    ducts
  15. R

    kinetico 2020. is it working?

    We have a kinetico 2020 water softner and although we get good lather and have a clean kettle etc we still get some form of build up on shower doors and tiles in the bathroom. It's gradual and if left long enough is really hard to shift. Vikal won't touch it. I have tested the soft water and...
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  17. pics

    pics

    pics
  18. R

    Lowering upper floor in garage

    I have a two story garage which was originally a coach house. It has solid brick walls. The upstairs was a hay loft. I'd like to lower the joists that form the upper floor so that there is more headroom upstairs. Currently the ground floor is over 3 meters high, I'd like to lower the...
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