Browse Forums Flooring & Floor Covering Re: 14mm timber floors over existing old boards 14Apr 30, 2010 7:09 am Trowelled glue stops the squeaking Re: 14mm timber floors over existing old boards 15Apr 30, 2010 9:52 am borg Melrich borg Not sure if i agree. If one board fails or is below optimial strengh than the 14mm non structial board will fail to. If laid at right angles then you take the wieght across many boards. Also you have the issue of expansion and contraction as well. You will double the issues you have with expansion and contraction. Where laid at right angles this will make your floor also more stable. Any other views out there?? I would lay same way as existing boards. That way the joists are properly supporting the floor. If you lay parrallel to the joists then you only have existing floorboards supporting the floor excepting where a new board runs along the length of the joist. if you are laying 19mm you may convince me. However 14mm is non structural and you cant just rely on the floor joist. Have to assume the existing floorboards are 19mm otherwise they would have to be on a substrate themselves. Ideally you want the new boards in someway attached to the joists. Re: 14mm timber floors over existing old boards 16May 01, 2010 9:27 am i've just got some feedback from an installer that by installing the plywood, the floor is installed to Australian standards. are there really Australian standards??? Re: 14mm timber floors over existing old boards 18Oct 11, 2023 9:03 am Hi all Thought I’d use this old thread rather than make a new one. I am looking to direct stick 14mm engineered blackbutt on top of an existing hardwood jarrah floor in a 30sqm lounge room. The existing timber is very solid and pretty flat already however we will have the polish sanded off and some minor high spots grinded down to ensure it’s properly flat. While we’d prefer to run the flooring in the same direction we will go perpendicular as for height reasons we can’t add a plywood base . I have checked the manufacturers installation guides and this is the approach they recommend. One thing I just can’t get a straight answer on is whether a moisture barrier or any other layer is needed between the old timber and new engineered board? Does anyone know? Or just glue it straight down with nothing in between? Ideally I don’t want to add an underlay as it will create some height issues. The same engineered flooring is being installed (direct stick as well) in rest of the house but straight onto the concrete slab. A moisture barrier is being used here (no underlay). Due to some issues with the slab heights from past renos (previous owners), the above approach actually results in the new floor being the same level throughout the house. I am also trying to ensure the feeling under foot is as close as possible between the room with the hardwood subfloor and rest of the house with concrete subfloor. My hope is direct sticking with nothing in between will help achieve this. Any advice appreciated! Re: 14mm timber floors over existing old boards 19Oct 12, 2023 5:36 pm Is the existing flooring stuck down or is it on joists/battens? If it's stuck down then you would assume that a MB was already installed before it was put down. Certainly if it's been down for many years and you've had no issues with movement then it's pretty safe to assume it's all good. You will be fine to direct stick to it after a good sand and clean. Accessible Carpentry & Cabinets accessiblecarpentry@gmail.com accessiblecarpentry.com.au https://www.facebook.com/pages/Accessible-Carpentry-Cabinets/583314911709039 Re: 14mm timber floors over existing old boards 20Oct 13, 2023 9:00 am I would sand back old floor to provide surface for adhesion of 14mm board on top, then direct stick and secret nail to keep it down. You will end up with a laminated timber floor 33mm thick that will be stronger and stiffer. Make sure your new floor timber is acclimatised before laying. 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 To put anything over slate you will need to put self level compound over the entire area as slate various in thickness and is very un even. To install most types of… 1 1112 Hi, I'm clearing the tiles from our horrid 50 year old bathroom and preparing to lay new ones. Bugger of a job getting the old… 0 8571 |