06-20-2008, 06:51 AM
Pam, yuppp... in the late seventyies & early eighties some builders were wrapping houses in plastic sheeting. Those houses didn't breathe & soon had all sorts of problems, including mold growth....
hence the overwelming use of tyvek (tar paper is much like plastic for vapor transmission plus the paper can have mold growth, unless there is an inhibitor...)
Also, the Hardie panel product is to be painted or stained (unprimed is the Hardie backer, it is to be used for tile adhesion or primed & painted) per the literature from James Hardie...
We are using the Hardie panels inside & outside, for the durability & non-mold growth (& inside because of unusual walls, they fit in the walls...), flat primed panels inside painted, outside primed cedarmilled stained with an approved stain for the primed panels....
A good paint or stain with a mold inhibitor is best here... be aware that although the Hardie backer does not support mold growth, the unprimed surface is more porous & can entrap moisture & dusty things that CAN support mold growth... the porousness is better for adhesive adhesion, thus better for tiling.
hence the overwelming use of tyvek (tar paper is much like plastic for vapor transmission plus the paper can have mold growth, unless there is an inhibitor...)
Also, the Hardie panel product is to be painted or stained (unprimed is the Hardie backer, it is to be used for tile adhesion or primed & painted) per the literature from James Hardie...
We are using the Hardie panels inside & outside, for the durability & non-mold growth (& inside because of unusual walls, they fit in the walls...), flat primed panels inside painted, outside primed cedarmilled stained with an approved stain for the primed panels....
A good paint or stain with a mold inhibitor is best here... be aware that although the Hardie backer does not support mold growth, the unprimed surface is more porous & can entrap moisture & dusty things that CAN support mold growth... the porousness is better for adhesive adhesion, thus better for tiling.