Flashings

Oatey® invented the flashing more than 100 years ago. Today Oatey flashings are used in commercial and residential applications where a water-tight seal around plumbing vent pipe or outside wall penetrations is required. Flashings are available in a variety of thermoplastic, aluminum, galvanized and copper materials. All Oatey Flashings are rated for a minimum of 180°F continuous heat and approved for Type B Installations. Oatey also offers the Master Flash® for commercial applications, along with a variety of specialty items including Rain Collars and Mushroom Caps.

Frequently Asked Questions

How is a rain collar installed?

After the correctly sized collar has been selected; you will apply a 100% exterior or marine rated silicone caulk to the top of the existing rain collar attached to the roof flashing, and also to the underside of the new rain collar. Slide the new rain collar down over the pipe to the top of the existing collar. Press the new collar down with enough pressure to seal the two together without collapsing the seal around the pipe.

What are the maximum temperature rating for roof flashings?

Oatey Master Flash and Retro-Master Flash are rated for continuous temperatures up to 212°F. All other Oatey flashings are rated for B venting, which are continuous temperatures up to 180°F.

Can standard No-Caulk roof flashings be installed on a metal roof?

No. The Oatey Master Flash or Retro-Master Flash should be used in this application.

Can the Master Flash flashing be installed on a shingled roof?

No. The Master Flash and Retro-Master Flash are specialty flashings designed for engineered roofs.

What material is rain collars made from?

TPE, Thermoplastic Elastomer 

Does the pipe have to be lubricated before the flashing is installed over the pipe?

No. You should however bevel (chamfer) the pipe end to prevent cutting or scaring of the rain collar as it is being pushed over the pipe.      

Is there a flashing made for roofs over a 45° angle (12/12 roof)?

Yes. The Oatey High-Rise Thermoplastic All-Flash No-Caulk Flashing is designed for roof up to a 60° angle (20/12 roof). 

How long should a roof flashing last?

This question doesn’t have a correct answer because of many variables that could affect the life span of a flashing. Examples are extreme heat, extreme cold, and hail.

What can be used to seal the No-Caulk flashing to the rooftop?

100% exterior or marine rated silicone caulk can be used to seal plastic base flashings to the rooftop.

What flashing is used for single wall metal exhaust pipes attached to water heaters and furnaces?

Single wall metal exhaust pipe should never be used to vent a water heater or furnace when the pipe passes through a combustible material of any kind due to risk of fire. The flashing rain collar will melt or warp if exposed to these temperatures passing through the single wall pipe, and loose the water tight seal it is designed for. All water heaters and furnaces not listed as high efficient should be vented using rated B vent pipe. B vent pipe is doubled wall pipe which isolates most of the exhaust heat to the interior pipe. All Oatey flashings are safe to use with B rated vent piping.

Related Resources

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What is a Roof Flashing?

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Videos

How to Select Roof Flashings

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