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  1. J

    Bussmann Class G time delay fuse

    Hi - maybe a long shot as this is a quite specialised fuse, but I recently purchased one of these which failed and I suspect it is not the genuine article. I understand that the time delay feature (which allows for higher initial current) is enabled via a spring loaded contact soldered to the...
  2. J

    Cutting hole for roof lantern in flat roof

    hi - not sure if this is one for roofing or joinery - I have a flat roof (3x10m, 6" insulation, with EPDM finish) and would like to get a 3x2m roof lantern installed, I've had a quote of 3K just to cut the hole and prepare the roof for the lantern which seems very steep - what sort of cost is...
  3. J

    Damaged flue terminal, what's missing?

    ok, but given that the last job I got charged over £100 for a part that I subsequently found I could purchase myself for less than £10 - can anyone let me know what part it is I need to buy - I will then ask a qualified engineer to fit it. thanks J
  4. J

    Damaged flue terminal, what's missing?

    Hi - we recently had some building work done and it looks like the scaffolding has damaged the flue terminal fitting (see photo). Can anyone help me to identify what is broken and so what part I need to buy? The boiler is a Worcester-Bosch 532i thanks J
  5. J

    Extending ring main (DIY limitations?)

    I have had a new ring circuit added as part of an extension - all signed off etc - it only has 2 sockets and covers the one room. Can I now extend that ring so that I can re-wire 3 bedrooms - ie are there any limitations as to how much I can extend a ring (total area would be less then 100m2)...
  6. J

    Upgrade boiler or install unvented cylinder

    Thanks - seems like the unvented cylinder may be the way to go, the plumber we're using has recommended it, he's planning on leaving one draw-off on existing combi.
  7. J

    Upgrade boiler or install unvented cylinder

    We've recently had a biggish extension added to the house and now have 4 bed with 3 bathrooms. The current (not so old) combi will struggle with the extra demand so was contemplating getting an unvented cylinder to supply the bathrooms but having perused various sites I'm in at least 2 minds on...
  8. J

    Is this flat roof design correct?

    Thanks for the comments - I think I'll go with a Visqueen barrier and extra thickness in the Kingspan layer rather than insulated ceiling board. I'm struggling with this warm roof construction though. Surely it's impossible to prevent 100% vapour from getting passed the vapour barrier (eg...
  9. J

    Is this flat roof design correct?

    Our architect has specified the following for a flat roof: zinc sheeting on membrane on 18mm ply on 100mm Kingspan (shouldn't there be vapour control layer here?) on 18mm ply on firrings on 150x50 joists underdraw joists with 50 mm insulation backed plasterboard and skim I have a couple of...
  10. J

    Firming up a 'bouncy' floor

    Thanks for all the replies - very helpful I like the idea of sistering the joists but there are a set of 8 downlighters used for the room beneath and not sure how much room I have (I dont really want them too close to the joists) -s but definitely worth a check. There's very little...
  11. J

    Firming up a 'bouncy' floor

    Just re-read RonnyRaygun - so ignore the question about what size the joists should be.
  12. J

    Firming up a 'bouncy' floor

    I'm pretty sure that that the downstairs room was never divided. It used to be a double garage (as in a proper double garage, not two singles separated by a wall etc). I have probably got some photos of the joists before we had the floor put down and could get a reasonable idea of dimension...
  13. J

    Firming up a 'bouncy' floor

    Thanks for the replies. There is a room underneath that is used. A builder that we use did previously comment on the bounce and he suggested that the joists should be thicker but the house is 25 years old and he didn't think there was any fundamental issue with the floor. RonnyRaygun...
  14. J

    Firming up a 'bouncy' floor

    Our living room has approx 17' span, don't know what size the joists are but the floor does sag, or at least it did - it was levelled with shims in order to lay a laminate floor a couple of years ago. It's level now but there is a bounce when you walk across the floor. My question is, can I...
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