Driwall CDR vent

1310ext00pDriwall CDR complete drained roof vent is a 0.30-inch-thick drainage and ventilation mat designed to eliminate moisture and moisture vapor in roofing and siding applications. Driwall CDR vent is useful in cedar shingles and shake roofing, and in siding where a clean airspace is desired for ventilation and drainage.
Keene Building Products, Cleveland,

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