Flooring for shed

[Fallout]

I need to refloor my shed the osd below has gone soft is around 15 years old. What would be best to use. If I got a sheet of plywood I wouldn't get it in in one piece. I thought of P5 chipboard as can get the pieces in and glue together. Any thoughts thanks

 

[Scally-Ho]

Chipboard is only intended for inside work and not for an external shed flooring.

 

[Fallout]

What would be best then?

 

[Scally-Ho]

A good quality external ply and then if needed to be cut to fit, joined and screwed onto stout battens for securing. OSB could be a substitute but IMO good smooth ply would be best.

 

[Fallout]

Thanks id have to put a joint in the middle of the floor then. Is there anyway of making this as smooth as possible

 

[Fallout]

Floor is 2meter x 1.8 meter. So id need two sheets?

 

[Scally-Ho]

Depending on your sawing skills, the cut pieces should butt up together nicely. Measure twice, cut once

 

[Fallout]

Thanks well I could put the machined square cut edges as the join in the middle? 3/4 wbp plywood would you recommend?

 

[Scally-Ho]

Yes, although expensive for flooring, WBP is a very good product for external use. Failing that, marine grade is just as good

 

[evdamadiynot]

When I built my shed I put a plastic membrane on the joists and use surplus chipboard loft boards.
Decade later theyre still rigid.

 

[Deleted member 323070]

.

 

[Fallout]

When I built my shed I put a plastic membrane on the joists and use surplus chipboard loft boards.
Decade later theyre still rigid

Chipboard as the flooring?

 

[Alec_t]

Painting the underside of a wood floor with bitumen prolongs the life of the shed floor.

 

[Fallout]

Would OSB board be better then P5 chipboard? It's a similar price to the chipboard

 

[big-all]

is the 2mx1.8 external or internal floor size??
the only reason i ask is if its external wall size and you have say 12mm cladding and 70mm frame that reduces the floor area by 164 so 1836x 1636 so 3sqm where as a 2.440x1220mm sheet is 2.9sqm so full length at the door odds and sods at the the back

probably not a realistic option iff joints are on a floaty or weak section but opens you up to say 18mm ply at the door along the long wall and main floor with osb/chipboard /whatever in the 415mm band left at the wall