EP0980498B1

EP0980498B1 - Attic vent

Info

Publication number: EP0980498B1
Application number: EP99911049A
Authority: EP
Inventors: Harry O'hagin
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-03-03
Filing date: 1999-03-03
Publication date: 2004-12-15
Anticipated expiration: 2019-03-03
Also published as: ES2234244T3; DE69922597D1; WO1999045327A1; AU2978599A; DE69922597T2; EP0980498A1

Description

BACKGROUND OF THE INVENTION 1 Field of the Invention

This invention relates to roof vents, and more specifically to passive attic vents for use on tile roofs.

2 Description of the Prior Art:

Energy efficiency is a serious consideration in new home design. New homes require ways to minimize energy requirements to maintain comfortable living spaces. One of the most common energy losses in a home is due to heat transfer through the attic. In warm climates, heat builds up in the attic from solar energy incident on the roof. In colder climates, moisture builds up in the attic, robbing the insulation of much of its R value. Early efforts at minimizing the effects of the heat and/or moisture build-up focused on the insulation between the living space and the attic. Gable vents and dormer type passive ventilation systems have been incorporated to ventilate the attic. In the southwest, many homes have low pitch, hip roofs which have no gables, and dormers may destroy the aesthetics of a design if improperly located or too numerous. Therefore, these systems have proven to be inadequate.

A passive attic vent with a camouflaged appearance has been marketed in recent years. This camouflaged vent has been difficult to manufacture and install.

What is needed is an improved passive ventilation system that will not affect the appearance of a building design if used in adequate numbers to properly ventilate the attic, and is useable on many roof configurations and with many types of roofing material.

Summary of the Invention

According to the present invention there is provided a sloped roof comprising:

a plurality of tiles mounted on the roof and a secondary vent;

wherein the said secondary vent includes:

a vent skeleton having an upslope edge and a downslope edge, said vent skeleton being formed of a single continuous piece of material having a cap area flanked by a parallel adjacent pan area, the cap area including one or more skeleton vent openings in ventilating communication with a vent opening through the roof, and
a vent cap covering at least the cap area and forming ventilating access therebetween;

characterized in that:

the vent cap is arranged such that air can be conducted from the skeleton vent opening to the outside via the downslope edge of the vent skeleton.

The advantages of this invention will become further apparent from the detailed description and accompanying figures that follow. In the figures and description, numerals indicate the various features, like numerals referring to like features throughtout both the drawings and the description.

Brief Description of the Drawings

Fig. 1 is a perspective view of a secondary vent skeleton and caps, according to the present invention, installed on a portion of a roof.

Fig. 2 is a top view of a secondary vent skeleton and caps according to the present invention.

Fig. 3 is a bottom view of the secondary vent skeleton and caps of Fig. 2.

Fig. 4 is a cross-section view of the secondary vent skeleton and caps of Fig. 2 taken along 4-4.

Fig. 5 is a cross-section view of the secondary vent skeleton and caps of Fig. 2 taken along 5-5.

Fig. 6 is a cross-section view of the secondary vent skeleton and caps of Fig. 2 taken along 6-6.

Fig. 7 is a perspective view from below of the front cap comer of a secondary vent skeleton and cap according to the present invention.

Fig. 8 is a perspective view of a mounting location for a primary vent showing the hole marked on the roof.

Fig. 9 is a perspective view of a mounting location for a primary vent showing the hole being cut in the roof.

Fig. 10 is a perspective view of a mounting location for a primary vent showing the primary vent being prepared for installation.

Fig. 11 is a perspective view of an installed primary vent showing the relationship to a secondary vent according to the present invention.

Detailed Description of the Preferred Embodiment(s)

Referring to Fig. 1, a section of pitched roof 11 near eave 60 is shown including a roof vent 10 according to a preferred embodiment of the present invention. Pitched roof 11 is generally composed of a plurality of field tiles 21, surrounded by edge tiles 13, edge caps 15 and ridge caps (not shown). Roof vent 10 is in two parts, primary vent 40 (shown in Fig. 11) and secondary vent 12. Roof vent 10 may be formed from any suitable metal such as aluminum, steel, or copper. In a currently preferred embodiment of the present invention roof vent 10 is formed of 26 gauge galvanized steel.

Referring now to Fig. 2, secondary vent 12 includes one or more caps 14 attached to lower piece or skeleton 16. Secondary vent 12 serves as a replacement for one or more field tiles 21 on pitched roof 11. Different tile types and similar looking tiles from different manufacturers have different physical dimensions and may require a unique skeleton configuration for a precise fit between the tiles and skeleton 16. Specific fit may be required between, upslope edge 42 to upslope tile 21U, pan flange 24 to pan 25, downslope edge 45 to downslope tile 13D and cap flange 22 to cap 23. Skeleton 16 may be made to fit the contours and edge configuration of the field tiles 21 used. Skeleton 16 may be formed in any conventional manner. In a currently preferred embodiment of the present invention, skeleton 16 is stamped from a single piece of material to fit precisely the field tiles 21 for which it is intended to be used. Skeleton 16 includes one or more pan areas 18 and a cap area 20 adjacent each pan area 18. Viewed from above, pan areas 18 are concave and cap areas 20 are convex. Pan areas 18 align with individual pan tiles or with corresponding pan areas of field tiles such as pan areas 17 of Fig. 1. Cap areas 20 align with individual cap tiles or with corresponding cap areas of field tiles 21 such as cap areas 19 of Fig. 1. Secondary vent 12 is mounted with pitch axis 31 parallel to the pitch of pitched roof 11.

Cap flange 22 is configured to fit underneath the cap of an adjacent field tile such as cap 23 as shown in Fig. 1. Cap flange 22 may include one or more creases such as crease 30 to obtain a precise fit to an adjacent field tile. Cap flange 22 may also have one or more bevels such as bevel 32 to minimize interference with an adjacent field tile. Pan flange 24 is configured to mate with the pan of an adjacent field tile such as pan 25 as shown in Fig. 1. Pan flange 24 may include one or more creases such as crease 28 to obtain a precise fit to an adjacent field tile. A plurality of

ribs

26, 26A and 26B are stamped into skeleton 16 for increased rigidity. In a currently preferred embodiment of the

present invention ribs

26, 26A and 26B are parallel to upslope edge 42. A hole 34 is included in each pan area 18 to accept a conventional fastener, such as a nail or a screw, to secure secondary vent 12 to a roof such as pitched roof 11.

Referring now to Fig. 3, the underside of skeleton 16 is shown in more detail. Skeleton 16 includes a vent opening 36 in each cap area 20. When installed above primary vent 40 as shown in Fig. 11, vent openings 36 are in ventilating communication with vent opening 46. Each vent opening 36 is located between

ribs

26A and 26B. A turtle 38 is attached to each pan area 18 adjacent edge 40. Turtle 38 is a spacer that compensates for the difference in thickness between field tiles 21 and skeleton 16. Turtle 38 may be formed and attached in any conventional manner to raise skeleton 16 above the roof battens such as batten 70 (in Fig. 11). Thickness compensating fingers 43 are formed along the downslope edge 45 of cap area 20. Thickness compensating fingers 43 compensate for the difference in thickness between field tiles 21 and skeleton 16 to provide a seal against the top of a downslope field tile such as downslope tile 13D. Wind clips 44 are attached to skeleton 16 to secure secondary vent 12 to lower course tiles 45 shown in Fig. 11.

Referring now to Fig.'s 4 and 5,

ribs

26, 26A, 26B, 50 and turtle 38 are seen in profile. Ribs 26 are shown concave up however other configurations may be suitable. Rib 26B is shown convex up however other configurations may be suitable. Rib 26A must be oriented concave up to minimize interference with caps 14 at shoulder 48. Ribs 50 are shown concave down however other configurations may be suitable. Legs 52 are attached to skeleton 16 and to caps 14 to support caps 14 and maintain ventilating access 54 between skeleton 16 and caps 14. Legs 52 may be attached in any conventional manner.

Caps 14 shield vent openings 36 from the weather and are attached to cap area 20 by any conventional means. In a currently preferred embodiment of the present invention a cap 14 is spot welded at shoulder 48 and legs 52. Caps 14 include side hems 27, a front hem.29, and ribs 50. In a currently preferred embodiment of the present invention, ribs 50 extend from one side hem 27 to the other parallel to front hem 29. Side hems 27 and front hem 29 are included to improve the weather shielding efficiency of cap 14 without sacrificing ventilating efficiency. Ribs 50 and are stamped into caps 14 for rigidity. Front and

side hems

29 and 27 may be made in any conventional manner such as cutting and bending. In a currently preferred embodiment of the present invention, front and

side hems

29 and 27 are formed by stamping to increase the rigidity of caps 14, and caps 14 are made in one standard size. A standard size cap 14 may be fitted to many different skeletons thus minimizing manufacturing and inventory complexity.

Referring now to Fig. 6, the uniform relationship between skeleton 16 and caps 14 is shown. Vent 10 serves dual purposes, ventilating attic 64 and protecting attic 64 from weather and pests. Vent opening 36, vent opening 46 and attic opening 58 cooperate to conduct attic air 62 from attic 64. Caps 14 are attached to skeleton 16 as shields over vent opening 36 to prevent weather and pests from falling directly into attic 64. Caps 14 also prevent direct solar irradiation of attic 64. Vent openings 36 are covered by screen 37 to prevent entry into space 66 by pests larger than the screen openings. Baffles 55 shield vent openings 36 from wind driven moisture and particles, and extend along edges R and L. Baffles 55 are H high and they are folded up along angle A between 0° and 90° from vent opening 36. In a currently preferred embodiment of the present invention, H is 0.64 cm (.25") and angle A is 50°.Cap 14 includes side hems 27, and a front hem 29 (shown in Fig. 7) to further shield vent opening 36 from entry of foreign matter. Side hems 27, and front hem 29 extend from cap 14 to below vent opening 36.

Attic air 62 flowing through a passive vent such as vent 10 follows the same path whether from outside 65 into attic 64, or from within the attic 64 to outside 65, only the direction of flow changes. For the sake of simplicity, attic air 62 flow from attic 64 to outside 65 will now be described with the understanding that the present invention functions equally well conducting air in both directions. Air travelling through vent 10 must undergo a change of direction that helps to prevent foreign matter from entering attic 64. As installed, vent opening 46 of primary vent 40 provides a convection driven ventilating channel through roof deck 56. Primary vent 40 conducts air up from within attic 64 through attic opening 58 and vent opening 46 to space 66. Convection continues to drive attic air 62 up through vent opening 36 into ventilating access 54. Attic air 62 in ventilating access 54 is then conducted up over baffles 55. Once above baffles 55 the shape of vent cap 14 and

hems

27 and 29 cause attic air 62 to change direction and travel down beyond side hems 27 or front hem 29 to outside 65.

Referring now to Fig. 7, thickness compensating fingers 43 and a wind clip 44 are shown in more detail. Thickness compensating fingers 43 may be formed by any conventional means, in a currently preferred embodiment of the present invention, thickness compensating fingers 43 are cut into downslope edge 45 of cap area 20 and folded. Due to the thickness disparity between skeleton 16 and adjacent field tiles 21, thickness compensating fingers 43 are needed to provide a pest seal against the top of the down slope field tile 21 when pan flange 24 is fitted to the pan of an adjacent field tile such as pan 25 as shown in Fig. 1.

In Fig.'s 8-11 installation steps for roof vent 10 are illustrated. Referring now to Fig. 8, location 57 on roof deck 56 is selected for installation of roof vent 10. Location 57 is marked to delineate where attic opening 58 will be cut. As shown in Fig. 9, saw 59 is used to cut attic opening 58 through roof deck 56. In Fig. 10, sealant 61 is applied to bottom side 41 of primary vent 40. Primary vent 40 is installed with bottom side 41 in contact with roof deck 56 and vent opening 46 in ventilating communication with attic opening 58. As shown in Fig. 11, secondary vent 12 is then installed above primary vent 40 with vent openings 36 in ventilation communication with vent opening 46. Vent opening 46 may be provided with screen 46S for additional protection against introduction of vermin or debris through attic opening 58. Fasteners (not shown) are attached through holes 34 into batten 70 to secure secondary vent 12.

For effective attic ventilation, roof vents 10 should be used in pairs. A pair of roof vents 10 are located on a roof parallel to the rafters with a first roof vent 10 near the roof peak (not shown) and a second roof vent 10 near eave 60. This configuration promotes passive air convection through the attic or rafter space as warm air rises through the first roof vent 10 cooler air is drawn into the attic or rafter space through second roof vent 10.

Claims

A sloped roof, comprising:

a plurality of tiles (21) mounted on the roof (11) and a secondary vent (12);

wherein the said secondary vent (12) includes:

a vent skeleton (16) having an upslope edge (42) and a downslope edge (45), said vent skeleton (16) being formed of a single continuous piece of material having a cap area (20) flanked by a parallel adjacent pan area (18), the cap area (20) and the pan area (18) extending from the upslope edge (42) to the downslope edge (45), the cap area (20) including one or more skeleton vent openings (36) in ventilating communication with a vent opening (46) of a primary vent (40) through the roof (11), and

a vent cap (14) covering at least the cap area (20) and forming ventilating access therebetween;

characterised in that:

the vent cap is arranged such that air can be conducted from the skeleton vent opening (36) to the outside via the downslope edge (45) of the vent skeleton (16).
The roof as claimed in claim 1, wherein said vent skeleton (16) and said vent cap (14) are formed of aluminium or galvanized steel or copper.
The roof as claimed in claim 1, wherein said vent skeleton (16) further comprises:

a plurality of ribs (26).
The roof as claimed in claim 3, wherein said plurality of ribs (26) are parallel to said horizontal rows.
The roof as claimed in claim 3, wherein said plurality of ribs (26) are formed into said single continuous piece of material.
The roof as claimed in any preceding claim, wherein said upslope and downslope edges precisely fit against adjacent upslope and downslope field tiles respectively.
The roof as claimed in any preceding claim, wherein said vent skeleton (16) has a cap flange (22) to precisely fit under and against a cap (23) of an adjacent field tile (21).
The roof as claimed in any preceding claim, wherein said vent skeleton (16) has a pan flange (24) to precisely fit against a pan (25) of an adjacent field tile (21).
The roof as claimed in claim 1, wherein said vent skeleton (16) and said vent cap (14) are mounted together in the shape of an S-style tile.
The roof as claimed in claim 1, wherein said vent skeleton (16) and said vent cap (14) are mounted together in the shape of double-wide roof tiles.
The roof as claimed in claim 1, wherein said vent skeleton (16) and said vent cap (14) are mounted together in the shape of the surrounding roof tiles.
The roof as claimed in claim 3, further comprising:

said vent skeleton (16) and said vent cap (14) painted or fused with color to match the surrounding roof tiles.
The roof as claimed in claim 9, wherein said vent skeleton (16) and said vent cap (14) are mounted together in the shape of an S-style clay tile.
The roof as claimed in claim 9, wherein said vent skeleton (16) and said vent cap (14) are mounted together in the shape of an-S-style concrete tile.
The roof as claimed in any preceding claim, wherein said vent cap (14) further comprises:

a front hem (29) extending along a front edge;

a side hem (27) extending along one or more side edges adjacent said front edge;

a plurality of ribs (50).
The roof as claimed in claim 15, wherein said ribs (50) are parallel to said front edge.
The roof as claimed in claim 16, wherein said plurality of ribs, said vent cap, said side and front edges are formed of a single continuous piece of material.