Posting a message to the forum will remove the above advertisement
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Discuss Them wooden things in the ceilings in the Electrical Forum area at ElectrciansForums.co.uk.

Please make sure you checkout our forum sponsors, many do discounts for members and, they keep the forum free to use.
  1. Chris
    Offline

    Chris Regular EF Member

    Location:
    Merseyside
    Hi,

    I feel over the past few years more people are moving towards recessed downlights, on new builds its easier as you can mark out while there is no ceiling and know where they will land. But when retrofitting i have a hard time missing all the joists, are those stud finders any good? Or does anyone have any advice/tricks to help with them?

    Thanks
     
  2. Rob
    Offline

    Rob Control System Engineer Respected Member

    Location:
    USA
    Tap with a hard object and you'll hear where the joists are.
     
    • Agree Agree x 2
    • Like Like x 1
  3. ferg
    Offline

    ferg Electrician's Arms

    Location:
    N.W.Scotland
    A hammer to tap the ceiling.

    I also use the magnets from my rod kit to find the nails or screws and consequently the bit of wood.
     
    • Like Like x 3
    • Agree Agree x 1
  4. Gavin John Hyde
    Offline

    Gavin John Hyde Electrician's Arms

    Location:
    Somerset
    Business Name:
    Sulis Electrical Services Ltd
    A 2 or 3mm drill bit is always useful. Find a joist and drill a hole. Maybe 3 small in all to find joist and its edges.
    Building regs did(it may still do) give tables for 400, 450 and 600 mm spaced joists. And thickness of boards etc.
    Measure out said gap and if its been built by a half sensible person you should find the next joist That gives you the spacing.
    It will differ slightly around chimneys, stairs etc...
    Most uk houses follow this spacing.
    As above magnets can find the fixings. With a lot of older ceilings you can in right light see joists as the ceiling either side being slightly different.
     
    • Like Like x 3
  5. Midwest
    Offline

    Midwest Electrician's Arms

    Location:
    Oxfordshire
    I use the above methods, and my trusty terminal bare blade terminal screwdriver, whose sole purpose is to find either side of joist. Then measure to next joist. It doesn’t locate noggins and metal pipes that might be in the way though.

    I have a stud detector, and it’s of much use as a chocolate fire grate. I’ve heated the really expensive ones are ok.
     
    • Agree Agree x 1
  6. littlespark
    Offline

    littlespark Electrician's Arms

    Location:
    Scottish Borders
    Never thought of using a magnet. Good idea.
    Tapping and listening for a hollow is good but tricky in noisy environment or double thickness of plasterboard.

    Modern builds are 400/ 450/ 600mm centres between joists, but the measurements never seem to land right.
     
  7. Pete999
    Offline

    Pete999 Forum Mentor

    Location:
    Northampton
    Business Name:
    None
    Get hold of the plans for the building, should show how the joists are laid out, within reason.
     
    • Optimistic Optimistic x 4
  8. Wilko
    Offline

    Wilko Electrician's Arms

    Location:
    Berkshire
    Business Name:
    Wilko Electrics
    I too use a small drill, "find first joist and measure" method. If this doesn't come up trumps, I go to the Man Himself for guidance.

    IMG_1363.jpg
     
  9. Bellendian
    Offline

    Bellendian Regular EF Member

    Location:
    Gatwick
    I always find that you either have to lift a strip of floorboards above, or remove a strip of plasterboard below, in order to drill joists and run cables through to new lights. So once you've done that you can see the joist spacings and drill for downlights accordingly.
    Not sure how you guys are running the wires to 'join the dots' once youve drilled your downlight holes using the tap or magnet method?
     
    • Like Like x 2
  10. Strima
    Offline

    Strima Electrician's Arms

    Location:
    St Neots
    I guess.
     
    • Funny Funny x 1
  11. buzzlightyear
    Offline

    buzzlightyear please let me back in to the prison cell. Electrician's Arms

    Location:
    star command
    My proferd way of doing it with stud finder and a drill bit and then go for it ,if it looks like a golf course tuff.
     
    • Funny Funny x 3
  12. richy3333
    Offline

    richy3333 Forum Mentor

    I use one of those really strong magnets - rare earth? Else a small drill bit. I think the stud finders are next to useless
     
    • Like Like x 1
  13. Midwest
    Offline

    Midwest Electrician's Arms

    Location:
    Oxfordshire
    WiFi electrics, it’s the way to go. Ask Tesla.
     
    • Funny Funny x 1
  14. Matthewd29
    Offline

    Matthewd29 Regular EF Member

    Location:
    Belfast
    If only that were the case. Most shops I've worked in don't even have a plan of emergency lights or anything like it. It amazes me sometimes as soon as it's done they must just part company, I do a lot of work in the airport here and they don't have have a decent map of most areas!
     
  15. SWD
    Offline

    SWD Gender neutral Electrician's Arms

    Location:
    London
    Lift the floor above, easy way to find the joists..........
     
    • Optimistic Optimistic x 1
Loading...
Similar Threads - wooden things ceilings Forum Date
Domestic Bringing ring to regs standard, and other things DIY Electrical Forum Jan 15, 2019

Share This Page

Electricians Directory Post a Domestic Job Post a Commercial Job