Plastic Wall board or sheets

Invites are in the mail, please rsvp by the 25’th. kthx

Like MDF? Paint it with what that would make it water proof?

What about this hardboard:

3/16 In. x 48 In. x 96 In
$13 a sheet

then just use some white semi gloss exterior latex paint to seal the wood, then calk the bitch to the floor and all the joints.

I think thats about the cheapest way to do it and make it work well. I mean your house gets rained on all the time, so no reason this shouldn’t work and last for a while.