MikeGrahamT21 Posted June 28, 2018 Share Posted June 28, 2018 How do you normally install your floor boards, do you cut to the joist, or ignore the joists and rely on the tongue and groove? I've always cut to the joist in the past, but i've heard people doing it the other way too, and relying on the T&G for the joint. Obviously the latter will result in better joints and less waste, but is it strong enough? We are considering 18mm OSB3 TGV4, or 22mm Chipboard TGV4. Link to comment Share on other sites More sharing options...
Mr Punter Posted June 28, 2018 Share Posted June 28, 2018 Go for 22mm lay at right angles to the joists. Normally try and lap the end on a joist and stagger the laps by half a board. I like D4 glue on the joists and on the tongue. Screw the boards down. Link to comment Share on other sites More sharing options...
MikeGrahamT21 Posted June 28, 2018 Author Share Posted June 28, 2018 For clarification, the 18mm OSB3 provides as much strength as 22mm chipboard too. Would you prefer chipboard over OSB? Link to comment Share on other sites More sharing options...
Mr Punter Posted June 28, 2018 Share Posted June 28, 2018 Sorry - I missed that. If they have the same strength and stiffness, chose the one that is cheaper. I guess the 18mm is lighter, which may make it easier to install if you are doing it on your own. Link to comment Share on other sites More sharing options...
ProDave Posted June 28, 2018 Share Posted June 28, 2018 Joints on joists. The only waste is at the end. With 400 or 600mm joist spacing then each board is an integer number of joists. Usually you get even joust spacing, with an odd spaced one at one side. So start laying starting at the even spaced joist and there is no more waste than you would get anyway when you reach the end. Link to comment Share on other sites More sharing options...
MikeGrahamT21 Posted June 28, 2018 Author Share Posted June 28, 2018 Yeah, i'll be doing it by myself. B&Q sell shorter boards (cerca 1600x634, instead of the usual 2400), which means i'll be able to fit them in the car and avoid delivery costs). Not too bothered about cost difference between the boards, I just want the best product. Always a bit dubious of chipboard and any potential water on them weakening them, hence why OSB3 is my first choice, plus its also classed as a load bearing product which chipboard isn't. Joist spacing is a little over 500mm, so we can't go for any less than 18mm OSB or 22mm chipboard. I'll aim for the OSB i think! And get some D4 glue from toolstation next time i'm down there. Link to comment Share on other sites More sharing options...
MikeGrahamT21 Posted June 28, 2018 Author Share Posted June 28, 2018 Just now, ProDave said: Joints on joists. The only waste is at the end. With 400 or 600mm joist spacing then each board is an integer number of joists. Usually you get even joust spacing, with an odd spaced one at one side. So start laying starting at the even spaced joist and there is no more waste than you would get anyway when you reach the end. Its a 1960s build, and the boards definitely don't line up to the joists, i know that from other rooms i've done! I'll stick to my previous practice of lining board ends up to joists Link to comment Share on other sites More sharing options...
PeterW Posted June 28, 2018 Share Posted June 28, 2018 At 500 centres I would go for 22mm. I use Egger and you can join anywhere - just glue the joints and stagger them. Easier and better than messing about when you’ve got walls in between joists too Link to comment Share on other sites More sharing options...
Simplysimon Posted June 28, 2018 Share Posted June 28, 2018 https://www.ebay.co.uk/itm/6x-D4-WOOD-ADHESIVE-GLUE-EVERBUILD-1LTR-1-LITRE-WATERPROOF-INDUSTRIAL-GRADE/141205179621?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649 haven't managed to find any cheaper..... unless someone knows better. quick delivery as well Link to comment Share on other sites More sharing options...
MikeGrahamT21 Posted June 29, 2018 Author Share Posted June 29, 2018 Yeah thats cheaper than toolstation, though i certainly don't need 6 bottles for what im doing! lol Link to comment Share on other sites More sharing options...
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