Dolmetscher007 Posted December 6, 2016 Report Share Posted December 6, 2016 I just bought five 4' x 8' sheets of MDF, and six sheets of 4' x 8' Hardboard. I am going to be using it for Wainscoting in my dining room. Right now, however, it is stashed in my garage. The garage does not leak or anything where water will directly contact it, but it has been raining for 2 days now, and I wanted to know if anyone has enough experience with MDF to tell me if just being outside in a non-heated, non-insulated garage can ruin MDF just because of the ambient moisture. ? Quote Link to comment Share on other sites More sharing options...
byegge Posted December 6, 2016 Report Share Posted December 6, 2016 I don't know for sure but the trucks that bring it to home Depot aren't air-conditioned either. They drive through weather extremes before getting to you Quote Link to comment Share on other sites More sharing options...
Dolmetscher007 Posted December 6, 2016 Author Report Share Posted December 6, 2016 Excellent point Quote Link to comment Share on other sites More sharing options...
MisterDrow Posted December 6, 2016 Report Share Posted December 6, 2016 MDF, by nature, is remarkably stable. As long as it isn't sitting in a puddle and directly soaking up water you should be good. 2 Quote Link to comment Share on other sites More sharing options...
minorhero Posted December 6, 2016 Report Share Posted December 6, 2016 I live in Maryland which is extremely humid . I bought some mdf years ago and stored it in my enclosed barn on a cement floor . after about 3 years it definitely developed mold and a musty smell . But it did take years. So long as you use it before then you should be fine. Quote Link to comment Share on other sites More sharing options...
Jfitz Posted December 6, 2016 Report Share Posted December 6, 2016 I'd get it up off the concrete onto blocks or something....but otherwise I think you'd be all set. Quote Link to comment Share on other sites More sharing options...
wdwerker Posted December 7, 2016 Report Share Posted December 7, 2016 Get it off the floor and support it every 2 ft or so. 1 Quote Link to comment Share on other sites More sharing options...
CharleyL Posted December 8, 2016 Report Share Posted December 8, 2016 I 2nd getting it up off the concrete. Use some 2 X 4 shorts or similar to get an air gap between the MDF and the concrete. Keep the garage door shut as much as reasonably possible, and it should be OK. Charley Quote Link to comment Share on other sites More sharing options...
mat60 Posted December 8, 2016 Report Share Posted December 8, 2016 Better to be safe than sorry. Thats what they say anyway. 1 Quote Link to comment Share on other sites More sharing options...
Jfitz Posted December 8, 2016 Report Share Posted December 8, 2016 1 hour ago, mat60 said: Better to be safe than sorry. Thats what they say anyway. "Better out than in". They say that too. 1 Quote Link to comment Share on other sites More sharing options...
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