DIY Doctor

Main navigation

Plywood Subfloor in Conservatory for Engineered Hardwood Flooring

Postby EricAnderson » Thu Jul 02, 2015 11:24 am


I've recently removed solid wood flooring from a conservatory, with the intent of replacing it with engineered wood. As the engineered wood is quite thin (13mm), I intend to first lay a sub floor of plywood, then float the engineered wood on top. The old solid wood flooring has been nailed battens with installation between them, and has some sort of plastic covering its back, see picture below.

A few questions:

1) Is this the right stuff for the job? ... m/p/110036 ?
2) Will I need to treat/seal the ply before installation?
3) Should I use a DPM between the battens and plywood?

Many thanks,

Rank: Labourer
Progress to next rank:
Posts: 1
Joined: Thu Jul 02, 2015 11:17 am


Gorilla Glue heavy duty grab adhesive

Postby thedoctor » Tue Dec 22, 2015 11:43 am


In terms of your questions:

1 - Yes, 18mm structural ply is the stuff to use for sure
2 - It is always a good idea to do this. Although you are above dpc level, there is always the possibility of spilt drinks, radiator leaks etc…. and treating it will help prevent damage from any of the affair mentioned. This Cuprinol 5 Star Wood Treatment is generally the best to use: ... tment.html
3 - No, you should be fine as you are above doc level

Hope this helps
Posts: 2525
Joined: Sat Apr 08, 2006 12:15 pm

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