Gutter guard extension

1. A size-adjustable debris preclusion device for securing to a top of a roof gutter attached to a building for keeping leaves and other debris out of the roof gutter, comprising:

a debris and leaf precluding gutter cover with a gutter lip end and an opposing roof-side end, sized to cover at least one of a portion of and all of a longitudinal section of a roof gutter's top, the cover having a fixed, non-adjustable width, wherein the roof-side end is shaped with a mating feature to a corresponding end; and

a debris and leaf precluding, low-profile gutter cover extension having a roof end and the corresponding end, the corresponding end having a complementary shape to the gutter cover's shaped end's mating feature, so as to permit a joining of the ends to maintain a debris and leaf precluding barrier between the gutter cover and extension, the complementary shape having at least one or more fingers with one or more short protrusions extending from the one or more fingers, the protrusion(s) operating to lock the finger into or onto a corresponding receiving receptacle(s) in the cover's mating feature,

wherein, when the gutter cover and extension are mated, form an extended gutter cover that entirely covers and is self-supporting over the roof's gutter top and a junction of the gutter cover and extension is low-profile, to permit water flow across a top of the junction.

2. The device of claim 1 , further comprising a screw or adhesive disposed into or between the cover's mating feature and extension's complementary shape.

3. The device of claim 1 , wherein a shape of the roof end of the extension is opposite the complementary shape, so as to permit joining of another extension to the roof end of the extension.

4. The device of claim 1 , further comprising one or more longitudinal markings along a top surface of the extension, indicating a distance or approximate gutter size.

5. The device of claim 4 , wherein the longitudinal markings are shaped as troughs to fit a protrusion.

6. The device of claim 1 , wherein the complementary shape of the extension further includes a bottom supporting foot, extending downward.

7. The device of claim 1 , wherein the extension is in the form of air L with an upper substantially vertical portion and lower substantially horizontal portion, wherein the horizontal portion includes the complementary shape.

8. The device of claim 7 , wherein the upper portion has a bent portion adapted to rest on a roof end.

9. The device of claim 8 , wherein the bent portion operates as a drip edge.

10. The device of claim 1 , further comprising a gutter.

11. The device of claim 1 , wherein the extension is formed from a metal or plastic.

12. The device of claim 1 , wherein at least one of the gutter cover and extension is weather resistant.

13. The device of claim 1 , wherein the gutter cover is water permeable.

14. A method for precluding leaf and other debris from entering a roof gutter that is attached to a building, comprising:

forming a debris and leaf precluding, gutter cover with a gutter lip end and an opposing roof-side end, wherein the roof-side end is shaped with a mating feature to a corresponding end and the mating feature includes one or more protrusion receptacle(s);

forming a low-profile gutter cover extension having a roof end and the corresponding end, the corresponding end having a complementary shape to the gutter cover's shaped end's mating feature and also having at least one finger with one or more protrusions to fit into or onto the cover's protrusion receptacle(s);

joining the gutter cover with the extension by inserting the cover's roof-side shaped end into the extension's corresponding end, to maintain a debris and leaf precluding barrier between the gutter cover and extension; and

securing the joined gutter cover and extension over a gutter, with the extension's roof end placed under a roof covering.

15. The method of claim 14 , further comprising joining an additional extension to the extension to cover the gutter.