A roof structure and a vented eave riser are described. A vented eave riser can include a barrier wall with one or more air flow openings, and an ember impedance structure positioned proximate to the barrier wall. A roof structure may comprise a roof deck and a layer of roof cover elements spaced ab
A roof structure and a vented eave riser are described. A vented eave riser can include a barrier wall with one or more air flow openings, and an ember impedance structure positioned proximate to the barrier wall. A roof structure may comprise a roof deck and a layer of roof cover elements spaced above the roof deck to form an air layer between the roof deck and the roof cover elements. The roof structure may also comprise one or more vent members each replacing and mimicking an appearance of one or more roof cover elements of the layer of roof cover elements, and/or at least one vented eave riser positioned at an eave between the roof deck and the layer of roof cover elements. The vent members and/or the vented eave riser may further include an ember impedance structure, such as a fire-resistant mesh material or a baffle structure.
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1. A vented eave riser, comprising: a barrier wall adapted to fit between a roof deck and one or more roof cover elements of a roof, wherein the barrier wall comprises one or more openings permitting air flow through the barrier wall;an ember impedance structure comprising a mesh material positioned
1. A vented eave riser, comprising: a barrier wall adapted to fit between a roof deck and one or more roof cover elements of a roof, wherein the barrier wall comprises one or more openings permitting air flow through the barrier wall;an ember impedance structure comprising a mesh material positioned proximate to the barrier wall, the ember impedance structure substantially preventing ingress of floating embers through the ember impedance structure, while permitting air flow through the ember impedance structure;a base; anda plurality of retention structures, wherein the barrier wall and the retention structures extend upwardly from the base such that the mesh material can be retained between the barrier wall and the retention structures. 2. The vented eave riser of claim 1, wherein the ember impedance structure comprises a fire-resistant mesh material. 3. The vented eave riser of claim 1, further comprising one or more louvers, each louver protecting one of the one or more openings. 4. A roof structure, comprising: a roof deck defining an eave;a layer of roof cover elements spaced above the roof deck to define an air layer between the roof deck and the layer of roof cover elements;at least one vented eave riser positioned at the eave between the roof deck and the layer of roof cover elements, wherein the vented eave riser comprises a barrier wall having one or more openings permitting air flow through the barrier wall into the air layer;wherein the vented eave riser comprises an ember impedance structure comprising a mesh material positioned proximate to the openings and within the air layer:a base; anda plurality of retention structures, wherein the barrier wall and the retention structures extend upwardly from the base such that the mesh material can be retained between the barrier wall and the retention structures. 5. The roof structure of claim 4, further comprising a plurality of vent members each replacing and mimicking an appearance of one or more roof cover elements of the layer of roof cover elements, each vent member comprising an opening permitting air flow between the air layer and a region above the vent member. 6. The roof structure of claim 5, wherein at least one of the vent members comprises an ember impedance structure that substantially prevents ingress of floating embers through the opening of the vent member. 7. The vented eave riser of claim 1, wherein the mesh material comprises a fibrous interwoven material. 8. The vented eave riser of claim 1, wherein the mesh material comprises stainless steel. 9. The vented eave riser of claim 8, wherein the mesh material comprises AISI 434 stainless steel. 10. The vented eave riser of claim 9, wherein the mesh material comprises steel wool. 11. The vented eave riser of claim 1, wherein the mesh material comprises steel wool. 12. The vented eave riser of claim 1, wherein the mesh material is approximately ¼″ thick. 13. The vented eave riser of claim 1, wherein the mesh material provides a net free ventilating area (NVFA) of at least approximately 133.28 inches per square foot. 14. The vented eave riser of claim 1, wherein the barrier wall includes an upper edge with a profile configured to substantially match a corresponding profile of one or more roof cover elements. 15. The vented eave riser of claim 1, wherein the retention structures comprise a plurality of fingers. 16. The roof structure of claim 4, wherein the roof deck does not include any openings that permit air flow between the air layer and a region below the roof deck. 17. The roof structure of claim 4, wherein the mesh material comprises a fibrous interwoven material. 18. The roof structure of claim 4, wherein the mesh material comprises stainless steel wool. 19. The roof structure of claim 18, wherein the mesh material comprises AISI 434 stainless steel. 20. The roof structure of claim 4, wherein the mesh material is approximately ¼″ thick. 21. The roof structure of claim 4, wherein the mesh material provides a net free ventilating area (NVFA) of at least approximately 133.28 inches per square foot. 22. The roof structure of claim 4, wherein the barrier wall includes an upper edge with a profile configured to substantially match a corresponding profile of one or more roof cover elements. 23. A roof structure, comprising: a roof deck defining an eave;a layer of roof cover elements spaced above the roof deck to define an air layer between the roof deck and the layer of roof cover elements; andat least one vented eave riser positioned at the eave between the roof deck and the layer of roof cover elements, wherein the vented eave riser comprises a barrier wall having one or more openings permitting air flow through the barrier wall into the air layer;wherein the vented eave riser comprises an ember impedance structure comprising a mesh material positioned proximate to the openings and within the air layer, and wherein the roof deck does not include any openings that permit air flow between the air layer and a region below the roof deck.
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