Had to pick between plywood and OSB for my shed subfloor

I was building a 8x10 shed in my backyard last month and couldn't decide on subfloor material. Plywood was $45 a sheet at Home Depot and OSB was only $28, so I went with OSB to save money. Big mistake - the first rain swelled up the edges near the door and now it's all bumpy. Anyone else had OSB fail like that or did I just get bad sheets?

3 comments

3 Comments

dianaanderson2mo agoMost Upvoted

Wait did you seal the edges with anything before installing? That first rain hitting raw OSB is brutal. I used exterior grade plywood on mine, painted all the edges too. Only cost me $20 more total. What's your plan to fix the bumps now?

the_richard2mo ago

Stick to plywood next time, that moisture issue won't go away.

alex_wilson792mo ago

OSB is fine if you keep it dry, yours just got wet.