WBP Plywood Shed

[SimonBM]

Hi All,

I want to build a leanto shed utilising two existing walls of my house. I prefer to use 12 or 18mm WBP Pine plywood (sometimes called shuttering or hoarding ply). Since its WBP the glue should be waterproof, at least to some extent. The sheets will be treated with a couple of coats of good quality woodstain on the external face and edges. They will be butted together and the joints sealed with mastic and supported with 2"x2" and 2"x3" framing.

Once constructed I will not have easy acess to the external walls to restain etc, although because of their location they will not receive harsh weather.

I hope the shed will last 5 years.

Do you think the ply will be suitable and will it last?

I don't want to waste money on exterior hardwood ply or marine ply.

Any advice would be appreciated. Thanks.

 

[Fluffybf]

Just give it a couple af coats of high build masonry paint. it gives it a nice textured finish and protects the boards just fine. I have workshop made from shuttering ply, i did the same to it years ago and its still going strong and its in a very exposed area.
Heres a good one http://www.sandtextrade.co.uk/en/Products/Primers+Undercoats+and+Finishes/High+Build/

 

[JohnD]

you need to raise the bottom of the sheets 200mm or so above ground level to reduce damp and rainsplash.

if you can put a couple of courses of brickwork on the base this is one good way. Do not stand the cladding on the bricks, let it overlap them so water drips off and they are not standing in it.

give the edges extra coats of paint or stain to prevent water penetration.

if the timber is protected from damp it will last well.