Ridge Flashing Purchase & Install Introduction

 

• Suggestions for purchasing ridge flashing. Use Detail Below as a guideline. Print the page if the detail is appropriate for your application. Do a scale drawing of the flashing needed for your ridge. Draw so that the leg(s) of the flashing are tilted down 5° from the actual pitch of your roof. This will create a small amount of pressure against the polycarbonate sheet, useful in achieving a watertight installation. Sheet metal should be a minimum of .019" aluminum or 30 gauge steel. Aluminum is easy to fasten through, easy to cut, but is a little flimsy and care is required in handling. Steel is more sturdy, harder to cut and requires pre drilling prior to fastening. Availability at your local sheet metal shop may be the limiting factor. Look in the Yellow Pages under Sheet Metal Work. Some shops, especially those that cater to glass installation contractors, will inventory bright glossy white and medium architectural bronze in the thickness you will be looking for. In high wind areas use Sikaflex 295 UV, not silicone, to bond tip of Ridge Flashing to poly.

 

• Home Depot & Lowes often stock freestanding flashing sections, in white, for steep pitch roofs. Bend as required for your roof. Rust-Oleum, Bright Coat, Metallic Finish - Dark Bronze #7713 paint will match our bronze aluminum. Check local paint stores for availability.

 

• Flashing Installation: Flashing sections, as detailed below, are typically fabricated in 8 ft. sections. There are two ways to proceed with the installation of flashing, as sheets are installed or after all sheets are installed.

 

The easiest method of installation is to set and screw down a section of flashing that covers the first sheet of polycarbonate (on freestanding greenhouses install sheets on both sides of the greenhouse). Set screws so flashing presses against polycarbonate, place a bead of sealant at this point and stop there. Lay the next sheet of polycarbonate. Now screw down the flashing and place a bead of sealant along the edge of flashing that comes in contact with the polycarbonate. Continue installing more polycarbonate and flashing. Overlap seams in flashing a minimum of 4". Do not cut to length as this will create a slight curl at cut & an uneven overlap. If the overlap ends up being 4 ft., so be it. This method provides a watertight installation, but care must be taken to lay a smooth bead of sealant on a cleaned surface.

 

 

 

 

Reload Site