I plan on laying T&G, 22mm, P5 chipboard flooring soon and would like to know what type and size screws should be used. I have looked through the forum and some people recommend 2.5 or 3 times the thickness of the chipboard for length. Some people recommend no. 8 or no. 10 screws, but Screwfix only seem to supply up to no.6 size screws. I was thinking of using 6*70mm Goldscrews, any ideas? Are the Quicksilver twin-threaded screws better?
I'd recommend 3 times the thickness of the board have a look at http://www.screwfix.com/app/sfd/cat/pro.jsp?id=17509&ts=90342 don't know if they are any good I always pre drill and you 5/6* 45 up turbogolds, don't know if that's right but works for me Andy
This answer is not a recommendation or a guess. The correct figure is three times the NOMINAL thickness of the timber you are attaching The only time you alter this is if the screw/nail will protude through the backing timber in which case you reduce the distance between the screw/nail The correct distance apart, nails or screws is no more than 24 times the thickness of the timber you are attaching.
Hi Turner I don't know where you get the idea that Screwfix only supply up to no.6 screws. I hope you realise that no.6 is not the same as a 6mm metric screw. Also you don't need chipboard screws, these have a thread suitable for securing to chipboard, whereas you are screwing through chipboard into joists. BB
The 6x70 gold screws you 1st said are HUGE. You want either No8 or 4mm screws at the length needed. The 4mm gold screws only go up to 50mm long. For a chipboard floor you may find the normal No 8 x 2½" better (quicksilver) Dont forget to drive 5/32" (4mm) clearance holes through the chipboard.
screwfix turbogolds are the quickest through chipboard, you dont have to predrill if you have a good cordless BUT........ screwfix deliveries are appalling. Look at the screwfix direct forum, I am not the only one who regularly gets appaling service and treatment.
I too would use no.8 or 4mm screws. Personally I would use Quicksilver screws but that is only because I have a huge stock of them and don't usually stock metric screws. But as someone else said they would use Turbogold, these screws have a single thread, a very sharp point and are waxed so that they are much easier to drive in, without pre-drilling. BB