laying plywood on top of plywood

[petek001]

Hi, a couple of questions if I may , my friends.
In the process of refurbing my garden office, I am thinking about floor maintenance. The builders 5 years ago, laid 18 mm think plywood sheets and there was underlay and then laminate on top of that. I have chucked the old laminate and underlay as wasnt happy with them, and now we want to lay carpet tiles instead.

The current plywood floor (18 mm thick) is fine, but instead of laminate, could i put a thinner plywood sheet on top of the current one, so to smoothen the floor and iron out any surface bumps / irregularities caused by the 18 mm plywood sheets. I was thinking of putting a 5 mm hardwood plywood sheet on top, like at the link below.

Hardwood Plywood Board (L)1830mm (W)607mm (T)3.6mm

Plywood is a warm and beautiful material. Its raw material, wood, is a renewable natural resource and one of the construction materials that has been awarded environmental certification. Plywood is strong, its surface durable, easy to work with and easy to handle. This makes it an excellent...

www.diy.com

can i paint on top of it with ronseal wood protector? to be on safe side. link below

Ronseal Clear Matt Fence & shed Preserver, 5L

You can apply this wood preserver from the Ronseal Total range to , using a brush, to provide protection. It takes 24 hours to dry and will cover up to 8 m² per litre on average.

www.diy.com

Thanks in advance

 

[Mottie]

I don't see why you can't - all you’re doing is increasing the number of ply’s beneath your feet.

 

[petek001]

is it okay to apply this wood preserver ina new plywood sheet? I applied a layer on to the current plywood boards, but when it dries, it looks like there has been nothing done to them!