Static structures (e.g. – buildings) – Wall – ceiling – floor – or roof designed for ventilation or...
Reexamination Certificate
2000-04-10
2001-10-09
Stephan, Beth A. (Department: 3635)
Static structures (e.g., buildings)
Wall, ceiling, floor, or roof designed for ventilation or...
C052S302600, C052S302300
Reexamination Certificate
active
06298620
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to the construction of exterior building walls and more particularly to a moisture control panel for exterior walls.
BACKGROUND
With certain types of exterior building walls, moisture penetration from the outside, generally as a result of rain, can be a problem. For example, with stucco, the moisture can penetrate the stucco to the underlying structure of the wall, creating a potential for leakage and damage to the wall.
The present invention is concerned with a moisture control panel that ameliorates this problem.
SUMMARY
According to the present invention there is provided a moisture control panel for use in exterior walls, said panel comprising:
a base sheet having top and bottom ends and inner and outer faces;
a plurality of drying perforations distributed over and extending through the base sheet from the outer face to the inner face; and
a plurality of bosses projecting from the inner face of the sheet.
The panel is placed in the wall under the outer layer of the wall. This allows moisture to leave the outer layer through the inner face, migrating through the drying perforations to the air space provided by the bosses projecting from the inner face of the moisture control panel.
To minimise the transfer of moisture from the inner face of the moisture control panel to the underlying inner wall structure, the bosses may be made to slope upwardly away from the inner face. They are preferably tapered to flat end faces lying in a common plane to support the moisture control panel at a fixed distance from the backing wall structure.
The drying perforations may slope downwards towards the inner face to aid in draining moisture away from the wet outer layer of the wall. Moisture capture is improved by recesses in the outer face of the moisture control panel into which the drying perforations open, near the bottom of each recess.
The base sheet is preferably made in standard panel sizes, for example 4 ft.×8 ft. or 1200 mm×2400 mm.
According to another aspect of the present invention there is provided a wall having:
an inner back-up wall component;
a moisture pervious outer wall; and
a moisture control panel comprising a base sheet overlying an inner face of the outer wall, a plurality of drying perforations extending through the moisture control panel and a plurality of bosses on an inner face of the base sheet engaging the back-up wall component.
The moisture control panel may be configured as described above. In preferred embodiments, vents at the top and bottom ends of the moisture control panel vent the air space provided by the bosses.
The outer wall may be a cementitious material, for example stucco.
REFERENCES:
patent: 4674249 (1987-06-01), Bennett, Jr.
patent: 6155013 (2000-12-01), Kim
patent: 2249509 (2000-04-01), None
Dorsey Dennis L.
Stephan Beth A.
Thrift Murray E.
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