JohnC Posted April 17, 2011 Report Share Posted April 17, 2011 This is a 2009 house with James Hardie Cement Siding. The exterior trim is puffy at many edges from water penetration. Does anyone the correct name of this product? It appears to be some sort of junk fiberboard. Thanks, John Callan Click to Enlarge 42.25 KB Click to Enlarge 46.62 KB Quote Link to comment Share on other sites More sharing options...
John Kogel Posted April 18, 2011 Report Share Posted April 18, 2011 It appears to be "MDF". Modified dung fiber. [] Quote Link to comment Share on other sites More sharing options...
ericwlewis Posted April 18, 2011 Report Share Posted April 18, 2011 the first picture looks like the "OSB" crap I see much of around Indy. Click to Enlarge 67.21 KB The second does look like MDF. Do they really use that somewhere? Quote Link to comment Share on other sites More sharing options...
charlieb Posted April 18, 2011 Report Share Posted April 18, 2011 Both are MDF and yep they use that stuff down in the wet south all the time. John, I like the acronym translation. Quote Link to comment Share on other sites More sharing options...
Nolan Kienitz Posted April 18, 2011 Report Share Posted April 18, 2011 John's verbiage is good. I just call it "composite siding". Quote Link to comment Share on other sites More sharing options...
Richard Moore Posted April 18, 2011 Report Share Posted April 18, 2011 From one manufacturer of moldings... MDF can be manufactured with special adhesives suitable for exterior applications including brick moulding, mouldings around doors and windows, exterior window sills, column facings, gable vents and louvers, soffit trim and other exterior trim. (my bold) Or, as a builder, you can save a bunch of money by using regular, interior grade MDF moldings as long as you're willing to skip town before it gets wet. Quote Link to comment Share on other sites More sharing options...
Brandon Whitmore Posted April 18, 2011 Report Share Posted April 18, 2011 I just call it "composite compost siding". Nolan, I fixed it for you. Quote Link to comment Share on other sites More sharing options...
David Meiland Posted April 18, 2011 Report Share Posted April 18, 2011 There is "MedEx" MDF for exterior use. I've had my hands on it once and soaked a piece in the sink for a few weeks. Minor edge swelling (less than 1/32" on a 3/4" piece) but I don't know what would happen after years. I consider the term "MedEx" to be generic, i.e. there was/is probably more than one manufacturer of similar product, but here's a current one, and note that it says not OK for exterior trim. http://www.sierrapine.com/index.php?pid=68 Quote Link to comment Share on other sites More sharing options...
hausdok Posted April 18, 2011 Report Share Posted April 18, 2011 There is "MedEx" MDF for exterior use. I've had my hands on it once and soaked a piece in the sink for a few weeks. Minor edge swelling (less than 1/32" on a 3/4" piece) but I don't know what would happen after years. I consider the term "MedEx" to be generic, i.e. there was/is probably more than one manufacturer of similar product, but here's a current one, and note that it says not OK for exterior trim. http://www.sierrapine.com/index.php?pid=68 Hi David, I wouldn't waste any energy trying to convince folks from other parts of the country that any form of OSB is anything more than landfill material. There's just too much misinformation out there about the product. Until it gets more widespread use and has been around in those other areas as long as we've seen it around here, they aren't likely to change their minds. ONE TEAM - ONE FIGHT!!! Mike Quote Link to comment Share on other sites More sharing options...
David Meiland Posted April 18, 2011 Report Share Posted April 18, 2011 Hey, not trying to persuade anyone of anything. OSB and MDF are very different, but they both fall apart in the wet pretty quick. Quote Link to comment Share on other sites More sharing options...
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