DIY Doctor

3mm or 6mm plywood for floorboard covering

Postby coleby » Sat Nov 08, 2008 6:08 pm

I asked my builder to put some plywood on my floorboards and he went ahead and put down 3mm plywood.

Somebody then said he should have used 6mm plywood because of the extra soundproofing it gives.

Can anyone advise on this ?
Rank: Apprentice
Progress to next rank:
Posts: 11
Joined: Mon Aug 04, 2008 4:44 pm


Simply Build It

Postby dennis graham » Sat Nov 08, 2008 9:57 pm

dont think it makes that much difference, in loft conversions we lay fibre glass to do same job, noise will still transmit through even at 18mm,
dennis graham
Rank: Apprentice
Progress to next rank:
Posts: 8
Joined: Thu Nov 06, 2008 10:37 am

Postby GaryS » Wed Dec 31, 2008 12:45 am

The main difference between 3mm and 6mm ply is that if the floor was uneven to start with the 3mm ply will tend to follow the curves of the subfloor more than the 6mm soundproofing is not an issue with either as both will transmit sound. so if your floor is now flat you are ok if not you may have to have another layer of 6mm put on top or lift 3mm and replace with 6mm
Rank: Apprentice
Progress to next rank:
Posts: 8
Joined: Wed Dec 31, 2008 12:07 am

Postby TheDoctor5 » Mon Jan 26, 2009 10:12 am

Last year 64% of the questions asked in our forum were answered within our DIY project pages at The project pages are now separated alphabetically and your answers are accompanied by diagrams and the ability to see, and buy, the tools and/or required to complete your project. Use our search box to look for your answer and save a great deal of time and money!
Posts: 1382
Joined: Tue Jan 20, 2009 9:17 am

Display posts from previous
Sort by
Order by

  • DIY How to Project Guides
  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!

  • Related Topics