Browse Forums Flooring & Floor Covering 1 Jan 25, 2013 8:37 pm hi all, we have had boards laid on our new slab back in november. they are 140x14mm laid to the mills specifications using trawled glue,ply,pins, plastic moisture barrier. today while cleaning i notice 1 board lifting where it joins another. it is about 500mm long. im concerned this is caused by moistur but would have thought more boards would be effected? what could cause this? We havent polished them yet, may this be the reason? but why only one small area? Can i get his sanded back so its flat or wil that cause other issues? any advice wil be greatly appreciated as im fearing the worse right now Help john Re: new floor cupping 2Jan 25, 2013 9:26 pm Hi donuts9999 The most likely cause of your floor cupping is moisture under timber causing swelling but alternatively it could be timber drying out and shrinking on top and or combination of both. Were your timber boards acclimatised before fixing? photo may help Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: new floor cupping 3Jan 26, 2013 6:32 am thanks for your response. Yes they were onsite for a few days in the spot they were being laid. i will keep an eye on them over the next couple weeks and hopefully it doesnt get worse Re: new floor cupping 4Feb 08, 2013 7:45 am Hi donuts 9999 Acclimatising timber floor boards before laying takes more than few days. Timber should be on site for 3-4 weeks properly stacked and racked for airflow. This will allow moisture content of timber to equalise with the room in which it is to be laid. Occasionally it is a rogue timber board that shrinks more than others. That can happen when backsawn board makes it into a pack of quarter sawn timber. Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: new floor cupping 5Jun 08, 2013 8:34 pm Hi Building expert im looking to get solid wood floor installed into my new home. i would like to avoid the outcome of cupping. i was advised by an installer in melbourne that they pay extra to be kiln dried. "No acclimatisation required, we pay a bit extra to have our timber kiln dried to Victorian conditions, we also do random moisture content tests and document this to ensure that the timber is at the correct moisture content for installation. On some rare occasions we have had to spread the timber and leave it for a week, but this has only really been done on old house renovations that have poor under floor ventilation" Does this sound right to you? i was also looking at using Boral solid wood on concrete. Is Boral any good? Thanks Re: new floor cupping 6Jun 09, 2013 8:22 am Even though its been kiln dry to the Vic climate, it still needs to be acclimatized.
Different houses have different moisture, even upstairs and downstairs differ. I would acclimatize for a minimum of 2 weeks. The longer the better, but min 2 weeks. I'm not sure what Boral timber you're using, but you need a moisture barrier. Plastic sheet & plywood, or waterpoofing the concrete. I prefer plywood. Ps I'm sure all timber flooring are kiln dried. Re: new floor cupping 8Jun 09, 2013 11:54 am Hi walkz187 "No acclimatisation required, we pay a bit extra to have our timber kiln dried to Victorian conditions, we also do random moisture content tests and document this to ensure that the timber is at the correct moisture content for installation. On some rare occasions we have had to spread the timber and leave it for a week, but this has only really been done on old house renovations that have poor under floor ventilation" Does this sound right to you? Definitely NOT! Firstly all flooring timber is kiln dried but all that it means is that it is in the "ball park" when it arrives on site. What about timber that is imported and may have been sitting in humid climate before arriving here? Even though it was originally KD (what assurance have you got that it was correctly done overseas) it's moisture content may have changed in storage. JB1 is right about different moisture in the same house. Upstairs can get hotter and therefore drier but variation can happen even on the same level where some rooms are exposed to lot of sunlight and others are not. Therefore timber should be stacked in each room to be used, in racks to allow airflow for four weeks. If not you will be taking a chance. http://i1321.photobucket.com/albums/u559/brankom10/12Untitled_zpsd6ecdec7.png In the photo above, secret nailed floor has shrunk and cracked, why? No prizes for guessing. Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: new floor cupping 10Jun 10, 2013 6:02 pm My floor (magnificent Rose gum) was done about ten years ago by Master Floors, absolutely first class but don't know if they are still around. There are so many house floors ruined by lack of planning transitions then you have difference in levels and tripping risk apart from second rate appearance. Solution? Planning and testing. Why is your designer not doing that? Is that not what they get paid for? Foremost Building Expert in Australia,assisting with building problems/disputes, building stage inspections,pre-contract review advice for peace of mind 200 blogs http://www.buildingexpert.net.au/blog Re: new floor cupping 11Jun 10, 2013 7:38 pm I'm building through Carlisle homes and they do not supply hardwood floors. So I'm trying to do my own research to ensure I ask them to do what is required so my flooring contractors are able to get the best possible outcome. So unfortunately no designer. I will check out master floors, meanwhile if you think of anything I should know. Please drop a line here Thanks CDC Housing Code 3 When to apply Floor Area external face of wall vs Gross Floor Area internal face of wall. Reading thru CDC Housing Code 3, lets take a lot 915sqm.… 0 16562 isn't a garage level with the rest of the house a given? pretty sure they 'came around' long time ago. if you have a flat block, the garage is usually level with the rest… 1 17526 6 55349 |