Roof Deck Assembly and Method

• US 20200131774A1
• Filed: 10/30/2019
• Published: 04/30/2020
• Est. Priority Date: 10/30/2018
• Status: Active Grant

• Current Assignee: Pro Fastening Systems, Inc.
• Original Assignee: Pro Fastening Systems, Inc.
• Inventors: Egan, Donal H.
• Granted Patent: US 10,844,603 B2
• Time in Patent Office: Days
• CPC Class Codes: E04D 13/1407 for flat roofs
• CPC Class Codes: E04D 13/1415 Junctions to walls extending above the perimeter of the roof trimming strips, edge strips or fascias retaining the roof sheathing E04D13/155
• CPC Class Codes: E04D 5/06 by making use of plastics
• CPC Class Codes: E04D 5/142 along the edge of the flexible material
• CPC Class Codes: E04D 5/146 Linear fastening means, e.g. strips

Abstract

The invention provides a generally horizontal roof deck having a corner and two parapet walls meeting at the corner. A roofing membrane has a major portion adhered to the roof deck and a side portion adhered to the first parapet wall and an end portion adhered to the second parapet wall. A bead of caulk is located between the side portion and the end portion and a respective parapet wall. Termination bars are affixed to the each of the parapet walls by axially driven pins that capture the termination bars on top of the respective side or end portions along their upper edges. Also disclosed is a method for constructing a roof deck using termination bars and axially driven pins that do not require predrilled holes.

Claims

1. A method of securing a roll of roofing membrane having a length with an end portion and a width with a side portion to a substantially horizontal roof deck and to first and second vertical parapet walls meeting at a corner comprising;

rolling out a length of roofing membrane on a roof deck with one side portion of the membrane extending upwardly so a bottom surface of the side portion abuts an inner surface of the first parapet wall, and a bottom surface of one end portion of the membrane extending upwardly so the bottom portion of the end portion abuts the inner surface of the second parapet wall, with the side portion and the end portion having an upper edge,

adhering the major portion of the membrane to the roof deck, the side portion to the first parapet wall and the end portion to the second parapet wall,

securing an elongate termination bar on the top surface of the side portion of the membrane with the top edge of the termination bar parallel to and proximate with the membrane side portion upper edge by axially driving a plurality of pins through the termination bar so that the pins extend through the termination bar and membrane side portion and are embedded into the first parapet wall,

securing an elongate termination bar on the top surface of the end portion of the membrane with the top edge of the termination bar parallel to and proximate with the membrane end portion upper edge by axially driving a plurality of pins through the termination bar so that the pins extend through the termination bar and membrane end portion and are embedded into the second parapet wall.

2. The method of claim 1 further comprising cutting a slit in the membrane at the corner of the first and second parapet walls.

3. The method of claim 2 further comprising adhering a flap of one of the side portion or the end portion to the other of the side portion or the end portion before securing the termination bars.

4. The method of claim 1 further comprising creating a pig ear fold by folding a portion of the side portion and the end portion of the membrane near the corner and adhering the folded portion to the top surface of one of the side portion or the end portion before securing the termination bars.

5. The method of claim 1 further comprising the step of placing a bead of caulking between the back side of the side portion and the first parapet wall and placing a bead of caulking between the back side of the end portion and the second parapet wall prior to securing the termination bars to the respective parapet walls.

6. The method of claim 1 wherein the termination bar has a rectangular cross section.

7. The method of claim 1 wherein the termination bar has an L shaped cross section.

8. The method of claim 1 wherein the termination bars comprise a front side and a back side and a sealant layer with backing tape on the back side, the method further comprising removing backing tape from the sealant layer on the back side of each termination bar prior to placing the respective termination bars on the side portion and end portion.

9. The method of claim 1 wherein the termination bars have a series of apertures spaced at even intervals along their lengths.

10. The method of claim 1 also including the step of placing a bead of caulking along the top of each of the termination bars after they have been secured to their respective parapet walls.

11. A roofing assembly comprising:

a generally horizontal roof deck having a corner;

a first parapet wall having an inner surface extending upwardly from one side of the roof deck;

a second parapet wall having an inner surface extending upwardly from a second side of the roof deck normal to the first side and meeting the first parapet wall at the corner of the roof deck;

a thermoplastic roofing membrane having a major portion extending horizontally and adhered to the roof deck, with a side portion of the roofing membrane extending upwardly along the inner surface of the first parapet wall, said side portion having a top edge, and with an end portion of the roofing membrane extending upwardly along the inner surface of the second parapet wall, the end portion also having a top edge;

a horizontal bead of caulk between the inner surface of the first parapet wall and the bottom surface of the side portion immediately below the top edge of the side surface, and between the inner surface of the second parapet wall and the bottom surface of the end portion immediately below the top edge of the end portion;

a first elongate termination bar secured to the top surface of the side portion of the roofing membrane so the top edge of the first termination bar is parallel to and proximate with the top edge of the side portion of the roofing membrane by a plurality of axially driven steel pins through the termination bar and side portion of the roofing membrane and into the first parapet wall; and

a second elongate termination bar secured top the top surface of the end portion of the roofing membrane so the top edge of the second termination bar is parallel to and proximate with the top edge of the end portion of the roofing membrane by a plurality of axially driven steel pins through the termination bar and end portion of the roofing membrane and into the second parapet wall.

12. The roofing assembly of claim 11 wherein the pins have a head, a point and a smooth shank.

13. The roofing assembly of claim 12 wherein the pins are made of hardened steel and are coated with a weather resistant coating.

14. The roofing assembly of claim 13 wherein the pins also have a washer under the head of the pin.

15. The roofing assembly of claim 11 wherein the termination bars backsides have a sealant layer attached thereto and the pins are also drive through the sealant layer.

16. The roofing assembly of claim 11 also comprising a bead of caulking above each termination bar.

17. The roofing assembly of claim 11 wherein each termination bar has a rectangular cross section.

18. The roofing assembly of claim 11 wherein each termination bar has an L shaped cross section.

19. The roofing assembly of claim 11 wherein the termination bars have a series of apertures spaced at even intervals along their lengths.

20. The roofing assembly of claim 11 wherein at the corner, a portion of one of the end portion or side portion of the membrane is folded over onto the top surface of the end portion or side portion and adhered to the top surface of the end portion or side portion.