|David Axt, AIA, CCS, CSI
Post Number: 282
|Posted on Tuesday, June 08, 2004 - 06:40 pm: |
An architect told me that Masonite no longer makes hardboard. Sure enough I can't find anything on the web. Maybe the siding litagation did that product in.
|Mark Handler, AIA|
Post Number: 6
|Posted on Tuesday, June 08, 2004 - 06:46 pm: |
Following the class action suit, Masonite ceased production of their hardboard siding.
|Brett M. Wilbur CSI, CDT, AIA|
Post Number: 57
|Posted on Monday, August 08, 2005 - 10:54 am: |
I'm also looking for masonite sheets to be used for protective cover board on carton void forms under suspended structural slabs.
Does anyone have any experience with this? Where can I get a spec for masonite? I'm in Houston with very expansive gumbo clay soils.
Post Number: 24
|Posted on Monday, August 08, 2005 - 11:18 am: |
ANSI A135.4 is Basic Hardboard. As a product, it is still made but is pretty much a commodity. If you care about water absorption don't use hardboard, as even the ANSI does not limit absorption to less than 25 percent for 1/8 inch board, with maximum swelling of 20 percent in thickness. The Composite Panel Association, at www.pbmdf.com, has a list of manufacturers.
Post Number: 123
|Posted on Monday, August 08, 2005 - 11:30 am: |
You also need to note whether you want standard (untempered) hardboard or tempered hardboard, which is standard hardboard subjected to a curing treatment increasing its stiffness, hardness, and weight.
Post Number: 25
|Posted on Monday, August 08, 2005 - 11:32 am: |
Yes, and the water resistance values I mentioned are for tempered hardboard. All the other classes are even worse.