Roof / Ceiling Question...

BaldBill

I have to do a small roof repair, no big deal...(a leak around a soil stack has led to rotten plywood and a leaking ceiling) however the house is a ranch with exposed beams. Above the beams are what appear to be 2 layers of homosote in 24" strips then the plywood sheathing,felt and shingles. The homosote is the only insulation as well as the ceiling The house was built in the 50's and is located in suburban Philadelphia.

Can anyone tell me what this homosote like material is? Is it still available etc? Any tips for this type of roofing / ceiling repair?

Thanks in advance!

theroofinggod

usually the sheathing was adhered to the top of the insulation,it`s still made,google it,you can fake it w/plywood and isocyanurate if you have to

AaronB.

Is homosote that asphalt empregnated perlite type stuff?

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PA woodbutcher

Don't know about the perilite part, but they list it as impregnated sheathing @ the lumber yard I use. Heard it called homosote, homo board, impregnated sheathing, beaver board.

AaronB.

So it is decking material?

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Free roof inspections within 12 miles of our locale.

Lab Rat

Homasote is a gray board that is made out of paper. It comes in 4'x8' sheets and is 1/2" thick. You'll find it in almost any school being used as bulletin boards. you can push pins into it with ease. Paints easy, Also has a 'R'
Factor Better than Drywall, but dont get it wet, Falls apart.

roofwiz74

,what's that other stuff used mainly in commercial roofing? tectom or something like that.looks like ramen noodles and takes special fastners.

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Ed the Roofer

Ah!!! The good old sea weed roof decking material.

Gypsum decks also required special fastening. I used to use an NTB fastening system.

Ed

theroofinggod

homasote is like iso w/adhered osb/ply top board,tectum is the white fireproof spaghetti board which is only used over firewall junctures

Ed the Roofer

Entire decks were done with tectum for the fire rating. I believe that it was very popular in the 60's. The town of Elk Grove Village, which borders the West side of O'Hare Airport was almost exclusively all tectum decks at the initial time the industrial park was developed.

Ed

theroofinggod

well that would go w/ the fireproofing purpose,but shingles etc don`t fasten very well to it even w/ the split nails---side note mirophone for computer solo is 7.99 at radio shack