joists | Page 2

joists

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  1. T

    Wires under no floorboards ?

    How would you approach laying in ring downstairs with no floorboards or joists just bare ground, the property is being refurbished ? Bit puzzled by this one !
  2. J

    loft wirng on rewire

    evening guys for you guys that regularly do rewires.... when you do the upstairs lighting wiring in the loft do you just use the existing holes in joists- and add a few extra 16mm holes if really needed who clips? who doesn't? to side of joist if insulation is on top and is also getting...
  3. T

    When is supplementary bonding not required ? Tails not on rcd...

    Hi all, im installing a new consumer unit in a bungalow , customer wanted it moving from bathroom to hallway. The system is a tns system and the meter tails are around 7 meters long, now because of this i have installed a 80 amp switch fuse inside the meter box and the tails run from this up the...
  4. S

    Overcoming joists

    Hi all, Hopefully some bright spark can enighten me. Been asked to move a bathroom ceiling light fitting today. Not a difficult job however I can't gain access to ceiling void due to a functional bathroom directly above the bathroom where the work needs doing. Floor tiles are laid which the...
  5. Z

    Rewire lighting circuits with limited access

    Folks, 1950's 3-storey town house, flat roof with no roofspace access on top floor, laminate flooring throughout apart from a few bits in hall and landings ... and I need to run new lighting circuits to all 3 floors, CU on ground floor. On quick inspection looks like it is riddled with metal...
  6. T

    Insulated plasterboard advice

    Alreet chaps once again i am turning to here for advice! I am hoping to plasterboard and skim our front bedroom this week but i am slightly unsure of which plasterboard to go for! We live in a very old cottage with 9.6ft ceilings and basically the house is cold all the time. So i have been...
  7. M

    Extension exposed floor joists and safe zones

    Hi extension kitchen with exposed beams. Walls to be dot and dabbed. Requested not to drill joists. in theory the bottom of exposed joists would be where plasterboard goes. So the 150 mm safe zone can be taken from the bottom of the joists? If so the cables can be run in oval against wall just...
  8. N

    extending down light circuit

    I've been asked to add a few led downlights to an existing circuit. There's no access from above as all new wooden floors in bedroom. I usually cut holes in ceiling to get to joists to run cables in and iv got to go through at least 5 joists. Just wondering if there are any less destructive...
  9. T

    Drilling through roof joists.

    Hello all, I've recently built a outhouse, and when I wired it I drilled through the roof joists, as going round the perimeter is a pain. It is in no way going to affect the structure as the roof joists are 6 by 2 and are far over specced for what they are doing or will ever do. I was hoping to...
  10. 4

    2.5mm2 T&E under ground floor, floor boards

    Hello, my first post! I've lifted the floor boards in my Bungalow and found that there is a void between the rafters and a solid concorete floor. This area being ventilated by air bricks at both front and rear of the building. Given the depth of the rafters drilling is not really an option ...
  11. applemac

    chipboard floors

    afternoon guys, just been to look at a shower install, got 15 meters of cable to fit under hall floor but its chipboard, ive been working on old houses for years, fitted these bleeding boards but just wondering the best way to lift them, obviously joists are all running the other way, dam modern...
  12. J

    query on joists from a nooby

    Hi All, I have only just about to qualify to be a sparky but still a few things a need to ask about as my tutor may have been just a robot and when it come to ans questions he seemed to have no idea. so anyway he mentioned that holes in a joist need to be 50mm from top and bottom but he...
  13. O

    cables over joists not through them?

    Regulations state cables through joist on a centre line at least 50mm from the top or bottom. In a modern warm flat roof there are firrings which are long wedge shaped soft wood fillits varying from 80mm to 0mm which sit on top of the joists and are used to tilt the roof for deck to assist...
  14. O

    running mains cable underfloor along a concrete sub floor

    I have just had an extension built to extend the kitchen and provide another room.The old kitchen area has honeycomb walls supporting a floor joists on a concrete base. The base is clean and without debris. The builder has suggested that when the electrician comes to to wire it up he could pass...
  15. R

    Joists

    I am familiar with the regs on a new build 25% and 40% of the joist span is for your cable holes (hope im right there) In an extension though do the same rules apply cause I'm in a situation where I need to drill within the first 10% of the span for a shower cable.Cheers
  16. I

    cable run perpendicular to loft joists.

    hi just been to look at a job, have to get a cable accross 4 joists ( perpendicular) now i know drilling loft joists is a no no, the cable run will be in an area of the loft not used for storage and the customer has no intention to board out the loft is there anything wrong with laying the...
  17. U

    Electric Cables on top of bedroom floor joists, touching central heating pipes. Safe?

    I've recently had a complete rewire. It's been a nightmare. Electrician called back once because cables not properly chased in and some wires left exposed. Now I am securring the floorboards he had taken up and cables are running in the same groove cut into the joists for the central heating...
  18. M

    Best tool for drilling inbetween joists

    Hi guys looking to see what you use ad im new to all this, Was thinking about an angled impact diver? Anyone used one for betweeb joists or got anything better? Cheers Mewff91
  19. DaveyD

    posi joists

    Any problem with posi joists guys? I have to quote and have never had them before. Looks too easy for me - must be a catch?!!! :) TIA, Dave
  20. J

    New build with steel webbed joists

    Hi Guys, Just had an email asking me to quote to wire some new builds, it said on the email that the Joists are Steel webbed and the cables will obviously need to be secured and clipped along these. How do you guys do this? is there a special type of clip or do u use a bit of all round band or...

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