Fenestration unit with drainage passage from corner key and through cladding

1. A fenestration unit comprising:

a frame corner key that includes a corner key fluid outlet, the frame corner key including a projection that is hollow and tubular, the corner key fluid outlet extending along the projection and extending therethrough;

a cladding having an aperture for the corner key fluid outlet, the aperture receiving the projection; and

a weep drainage system with a fluid path defined from the frame corner key, through the corner key fluid outlet, and through the aperture to drain from the fenestration unit.

2. The fenestration unit of claim 1 , further comprising a sealing member that seals between the frame corner key and the cladding, proximate the aperture.

3. The fenestration unit of claim 2 , wherein the frame corner key includes a projection and the aperture receives the projection, the corner key fluid outlet extending along the projection; and

wherein the sealing member extends within a gap between the projection and the cladding, proximate the aperture.

4. The fenestration unit of claim 3 , wherein the corner key includes a sealant injection aperture that provides fluid access to the gap from outside the fenestration unit.

5. The fenestration unit of claim 1 , wherein the corner key includes a reservoir configured to collect fluid, and wherein the fluid path is defined from the reservoir, through the corner key fluid outlet, and through the aperture to drain from the fenestration unit.

6. The fenestration unit of claim 1 , wherein the cladding includes an apron segment with the aperture, the aperture being open at one end of the apron segment.

7. The fenestration unit of claim 1 , wherein the cladding includes an apron segment that defines at least part of the aperture and that includes a weep outlet; and

wherein the fluid path is defined from the frame corner key, through the corner key fluid outlet, through the aperture, and through the weep outlet to drain from the fenestration unit.

8. The fenestration unit of claim 7 , further comprising a frame sill member;

wherein the apron segment includes a cover portion that at least partly covers the frame sill member and the frame corner key;

wherein the apron segment includes a first projecting wall and a second projecting wall that project from the cover portion; and

wherein the aperture is included in the cover portion, and the weep outlet is defined between the first and second projecting walls.

9. A fenestration unit comprising:

a frame corner key that includes a corner key fluid outlet;

a cladding having an aperture for the corner key fluid outlet;

a weep drainage system with a fluid path defined from the frame corner key, through the corner key fluid outlet, and through the aperture to drain from the fenestration unit;

a sealing member that seals between the frame corner key and the cladding, proximate the aperture;

the frame corner key including a projection and the aperture receiving the projection, the corner key fluid outlet extending along the projection;

the sealing member extending within a gap between the projection and the cladding, proximate the aperture; and

the corner key including a sealant injection aperture that provides fluid access to the gap from outside the fenestration unit.

10. The fenestration unit of claim 9 , wherein the corner key includes a reservoir configured to collect fluid, and wherein the fluid path is defined from the reservoir, through the corner key fluid outlet, and through the aperture to drain from the fenestration unit.

11. The fenestration unit of claim 9 , wherein the cladding includes an apron segment with the aperture, the aperture being open at one end of the apron cladding segment.

12. The fenestration unit of claim 9 , wherein the cladding includes an apron segment that defines at least part of the aperture and that includes a weep outlet; and

wherein the fluid path is defined from the frame corner key, through the corner key fluid outlet, through the aperture, and through the weep outlet to drain from the fenestration unit.

13. The fenestration unit of claim 12 , further comprising a frame sill member;

wherein the apron segment includes a cover portion that at least partly covers the frame sill member and the frame corner key;

wherein the apron segment includes a first projecting wall and a second projecting wall that project from the cover portion; and

wherein the aperture is included in the cover portion, and the weep outlet is defined between the first and second projecting walls.

14. A fenestration unit comprising:

a frame corner key that includes a corner key fluid outlet;

a cladding having an aperture for the corner key fluid outlet, the cladding including an apron segment that defines at least part of the aperture and that includes a weep outlet;

a frame sill member, the apron segment including a cover portion that at least partly covers the frame sill member and the frame corner key, the apron segment including a first projecting wall and a second projecting wall that project from the cover portion;

a weep drainage system with a fluid path defined from the frame corner key, through the corner key fluid outlet, and through the aperture to drain from the fenestration unit, the fluid path being defined from the frame corner key, through the corner key fluid outlet, through the aperture, and through the weep outlet to drain from the fenestration unit; and

the aperture being included in the cover portion, and the weep outlet being defined between the first and second projecting walls.

15. The fenestration unit of claim 14 , wherein the frame corner key includes a projection, and the aperture receives the projection, the corner key fluid outlet extending along the projection.

16. The fenestration unit of claim 14 , further comprising a sealing member that seals between the frame corner key and the cladding, proximate the aperture.

17. The fenestration unit of claim 16 , wherein the frame corner key includes a projection and the aperture receives the projection, the corner key fluid outlet extending along the projection; and

wherein the sealing member extends within a gap between the projection and the cladding, proximate the aperture.

18. The fenestration unit of claim 14 , wherein the corner key includes a reservoir configured to collect fluid, and wherein the fluid path is defined from the reservoir, through the corner key fluid outlet, and through the aperture to drain from the fenestration unit.

19. The fenestration unit of claim 14 , wherein the aperture is open at one end of the apron segment.