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wood fiber-cement roofing?

wood fiber-cement roofing?

wood fiber-cement roofing?

I was on a job site today -an old warehouse- where we thought concrete was spalling on the roof.  What we thought was concrete was actually a wood chip and cement mix.  What we thought was rebar, well... it wasn't.  I'm not sure what it was as I could not get close enough to touch it.  There was wire spaced about 3 inches on center and it ran perpindicular to the bar.  It was kinda like a mesh.

I'm not familiar with this construction.  Is it structural or just a form of insulation?

RE: wood fiber-cement roofing?

It is a cast-in-place form of insulation, similar to cast-in-place gypsum, and pre-dating Tectum panels.

It looks like it has lost most of its integrity.  Be careful walking on that roof, although the mesh provides some protection from falling through.

RE: wood fiber-cement roofing?

Thanks, Ron.  Do you think there is anything else structurally holding this roof up?  My brain tells me there has got to be, but I really don't know.

RE: wood fiber-cement roofing?

Not necessarily.  These cast-in-place systems were popular in the late 40's, 50's and 60's.  Most were gypsum based, but some were portland cement with a variety of insulative aggregates used.

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