Ventilation – Having inlet airway – Through roof eaves or rafters
Patent
1991-11-15
1993-08-24
Joyce, Harold
Ventilation
Having inlet airway
Through roof eaves or rafters
F24F 700
Patent
active
052384500
ABSTRACT:
An air-permeable barrier for soffit ventilation systems, and method for installing same to provide a barrier against insect ingress and flow blockage by internal insulation. The barrier comprises a flexible mat of randomly aligned fibers which is attached to the roof and sill plate between adjacent joists and rafters, and is flexed to extend into the eaves with the lateral edges of the barrier abutting the joists and rafters to create a barrier against the entry of insects into the attic. The mat further prevents insulation from blocking the soffit vents and provides an air channel to the attic along the roof sheathing. An alternative embodiment has a vapor barrier layer adhered to one face to channel air flow through the barrier in the longitudinal plane only to eliminate wind wash through the insulation. Such mat is installed by laying it between a joist and rafter with one end of the mat lying over the sill plate, then stapling the mat to the sill plate, bending the flexible mat such that it extends into the eaves and reflects back along the slope of the roof with the lateral edges abutting the rafters, and stapling the second end of the mat to the roof sheathing.
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