US2039674A - Roof flashing - Google Patents

Description

May 5, 1936. H. F. WINKELMANN ROOF FLASHING Filed Jan. 3, 1934 Patented May 5, 1936 UNITED STATES PATENT OFFICE 2 Claims.

This invention relates to a flashing for roofs. one of the objects being to provide a flashing so constructed that it can be fastened readily to the roof coping and will serve as a means for anchor- 5 ing a plastic coating material employed for the purpose of sealing the connection between the coping and the flashing.

A further object is to provide a flashing which is separate from the roof material and permits expansion and contraction of the parts without distorting or rupturing the same and causing leaks.

A still further object is to provide a flashing which is held tightly to the coping so that moisture will not accumulate behind it.

A further object is to provide a flashing which can be applied readily, is adaptable to any kind of a roof now in use, and permits repairing or remodeling of the roof without disturbing the flashing where joined to the Wall.

A still further object is to provide a flashing which can be arranged with its lower edge parallel with the roof no matter at what angle the roof may be constructed.

With the foregoing and other objects in view which will appear as the description proceeds, the invention consists of certain novel details of construction and combinations of parts hereinafter more fully described and pointed out in the claims, it being understood that changes may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed.

In the accompanying drawing the preferred form of the invention has been shown.

In said drawing Figure l is a section through a portion of a roof showing a portion of the flashing in position, part of the plastic coating of the flashing being removed.

Figure 2 is a section on line 2-2 Figure 1.

Figure 3 is a perspective view of a portion of the flashing.

Referring to the figures by characters of reference I designates a strip of metal such as copper, galvanized iron, tin or the like and of any desired weight and thickness, the strip being of any width whereby it can be trimmed along its lower portion to adapt it to different roof requirements.

The strip l is offset near its upper edge to provide an inclined shoulder 2 extending longitudinally thereof and the upper edge of the strip is double seamed as indicated at 3 so as to join it securely to a length of expanded metal shown at 4.

The strip I is of any desired length and the expanded metal 4 is extended throughout the length thereof.

In practice the material of the roof covering A is extended upwardly as at B a required distance upon the inner side of a coping C. The flashing is applied to the coping by nailing or otherwise attaching the expanded metal thereto as indicated at 5, the offset portion of shoulder 2 being disposed close to the top edge of the upwardly extending portion B of the roof material and the strip I being extended downwardly so as to form a depending apron adapted to lap this upwardly extending portion as shown particularly in Figure 2. The lower portion of strip l is adapted to be trimmed so that its lower edge will be supported close to and parallel with the top surface of the roof.

After the flashing has been applied as described a coating 6 of suitable plastic material such as waterproofed cement, is applied to the expanded metal portion so as to become keyed thereto. It is also extended downwardly to the shoulder 2 so as to be supported thereby with its exposed surface substantially flush with the corresponding surface of the strip I. The upper portion of the plastic material can be extended under and close to the top D of the coping as shown at the right of Figure 1. Thus a tight connection is provided between the flashing and the coping so that leakage through the flashing can not occur. As the strip I is not joined to the roofing material A and B, relative movement of the wall and roof is permissible without causing distortion or rupture of any of the parts and consequently no leaks will occur.

The flashing can be formed in long lengths of material. For example strips from 6 to 10 feet in length have been employed. Where the ends of the lengths of flashing are brought together they are placed in lapped relation so as to form joints not less than 2 or 3 inches in length.

What is claimed is;

1. In a roof construction an imperforate strip of sheet metal suitable for use as a flashing, a second strip of metal suitable for expansion, said second strip being expanded for use as a metal lath, the two strips being arranged with joined lapping edge portions, the imperforate strip being oifset longitudinally to provide a moistureshedding shoulder inclined downwardly beneath the seam and extending laterally beyond the plane of the expanded metal strip, the lower portion of the imperforate strip constituting an apron depending from the lower side of the shoulder for freely lapping the edge of a roof covering.

2. In a roof construction an imperforate strip of sheet metal suitable for use as a flashing, a second strip of metal suitable for expansion, said second strip being expanded for use as a metal lath, the two strips being arranged with joined lapping edge portions, the imperforate strip being offset longitudinally to provide a moistureshedding shoulder inclined downwardly beneath the seam and extending laterally beyond the plane of the expanded metal strip, the lower portion of the imperforate strip constituting an apron depending from the lower side of the shoulder for freely lapping the edge of a roof covering, said expanded metal portion being provided for attachment to the inner side of a coping, and a plastic coating covering and anchored in the expanded metal strip and resting on the shoulder, the exposed surface of the coating being substantially flush with the exposed surface of the apron.

' HENRY F. WINKELMANN.

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