Telescoping ridge vent

1. A ridge vent configured to cover an open ridge of a roof and allow a flow of air to exit from the open ridge through the ridge vent, the ridge vent comprising:

a ridge vent body;

a projection extending from the ridge vent body; and

a projection receiving portion extending into the ridge vent body;

wherein the ridge vent is configured such that when a first ridge vent is secured over a ridge opening the projection of a second ridge vent is at least partially receivable in a projection receiving portion of the first ridge vent, and

wherein the projection comprises a plurality of temperature guide lines disposed on a top surface of the projection which indicate a distance the projection should be inserted into the projection receiving portion of another ridge vent.

2. The ridge vent of claim 1 wherein the projection receiving portion comprises a top wall of the ridge vent body and first and second projections downwardly from the top wall and inset from left and right edges of the ridge vent body.

3. The ridge vent of claim 1 wherein the projection includes a top wall and first and second walls extending downward from the top wall.

4. The ridge vent of claim 1 wherein the projection comprises a plurality of temperature indicia disposed on a top surface of the projection which indicate a distance the projection should be inserted into the projection receiving area of another ridge vent for a corresponding plurality of ambient installation temperature ranges.

5. The ridge vent of claim 1 wherein the ridge vent has a plurality of louvers positioned in a left portion and a right portion.

6. The ridge vent of claim 1 wherein the ridge vent has a plurality of louvers positioned in the projection.

7. The ridge vent of claim 1 further comprising a center portion having opposing ends, at least one of the opposing ends having a plurality of projections, the plurality of projections each having a plurality of legs that have a cross-sectional shape in the form of a “V”, wherein the plurality of legs form sealing structures.

8. A ridge vent system comprising:

first and second ridge vent sections each comprising:

a ridge vent body;

a projection extending from the ridge vent body; and

a projection receiving portion extending into the ridge vent body;

wherein the projection of the second ridge vent section is at least partially disposed in the projection receiving portion of the first ridge vent section, and

wherein the projection comprises a plurality of temperature guide lines disposed on a top surface of the projection which indicate a distance the projection should be inserted into the projection receiving portion of another ridge vent.

9. The ridge vent system of claim 8 wherein the projection receiving portions of the first and second ridge vent sections comprise a top wall of the ridge vent body and first and second projections downwardly from the top wall and inset from left and right edges of the ridge vent body.

10. The ridge vent system of claim 8 wherein the projection includes a top wall and first and second walls extending downward from the top wall.

11. The ridge vent system of claim 8 wherein the projection comprises a plurality of temperature indicia disposed on a top surface of the projection which indicate a distance the projection should be inserted into the projection receiving area of another ridge vent for a corresponding plurality of ambient installation temperature ranges.

12. The ridge vent system of claim 8 wherein each ridge vent has a plurality of louvers positioned in the left and right portions.

13. The ridge vent system of claim 8 wherein the center portion of the ridge vents have opposing ends, at least one of the opposing ends having a plurality of projections, the plurality of projections each having a plurality of legs that have a cross-sectional shape in the form of a “V”, wherein the plurality of legs form sealing structures.

14. The ridge vent system of claim 8 wherein the front edge of each ridge vent interlocks with the rear edge of a subsequently installed ridge vent.

15. A method for installing ridge vents comprising:

positioning a first ridge vent over the open ridge of the roof;

fastening the first ridge vent to the roof deck;

positioning a front face projection of a second ridge vent in a same direction as the first ridge vent;

inserting the front face projection of the second ridge vent in a projection receiving area of the first ridge vent, wherein a depth of said inserting is selected based on an ambient installation temperature; and

covering the installed ridge vents with ridge shingles,

wherein the first ridge vent includes a plurality of temperature guide lines disposed on the projection which indicate a distance the projection should be inserted into the projection receiving area of another ridge vent.