Short penetration flashing, flashing systems and methods for installing them

A kit for protecting roof penetrations from water intrusions, the kit comprising:

• a plurality of first flashing plates, each of the first flashing plates being configured to be positioned on a roof over a first course of shingles so as to cover a respective roofing penetration in the first course of shingles and partially under a second course of shingles, such that each first flashing plate is spaced from a third course of shingles that overlaps a portion of the second course of shingles, such that a gap is formed in a direction of the slope of the roof between a top edge of the respective first flashing plate and a lower end of the third course of shingles;
• and
• an elongate second flashing plate that is longer than each of the first flashing plates, the elongate second flashing plate being configured to be positioned on the roof to cover the second roofing penetration, to be partially disposed under the second course of shingles, and to extend under the third course of shingles so as to form an overlap between a top edge of the elongate second flashing plate and the lower end of the third course of shingles.

A kit for protecting roof penetrations from water intrusions, the kit comprising:

• a plurality of flashing plates, each of the flashing plates being configured to be positioned on a roof over a first course of shingles so as to cover a respective roofing penetration in the first course of shingles and partially under a second course of shingles, such that each first flashing plate is spaced from a third course of shingles that overlaps a portion of the second course of shingles, such that a gap is formed in a direction of the slope of the roof between a top edge of the flashing plate and a lower end of the third course of shingles;
• and
• a cover configured to cover a top edge of a respective one of the flashing plates so as to deter water infiltration through a discontinuity in the second course of shingles.