When working on steeply pitched roofs, standard flashings often fail to sit correctly, leaving gaps that risk leaks and water damage. The Master Flash Extreme Angle is designed specifically for these conditions, with a built-in 40° pitch that ensures a snug, watertight fit on slopes between 35° and 65°.

Made from durable EPDM or high-temperature silicone with a flexible cone and mouldable aluminium base, it provides long-term protection while accommodating pipe movement. This makes it the ideal solution for metal and other steep roof types where traditional flashings simply don’t perform.

Why is flashing more challenging on steep roofs?

On roofs with a steep pitch, standard flashings often struggle to sit correctly against the roofing surface.

This can leave gaps that allow water to run underneath, creating leaks.

The Master Flash Extreme Angle is specifically designed to solve this problem with a built-in pitch.

What makes the Master Flash Extreme Angle different?

The Extreme Angle flashing incorporates a 40° built-in pitch.

This allows it to sit neatly on roof slopes between 35° and 65°, ensuring full contact and a watertight seal where a standard flashing would be difficult to install properly.

What materials is it made from?

It is manufactured from flexible EPDM or high-temperature silicone. Both materials are highly resistant to weathering, UV radiation, and ozone, ensuring long-term durability.

The aluminium base provides a secure, mouldable fit against the roofing surface.

Can it accommodate pipe movement?

Yes. The EPDM or silicone cone is designed to flex with the pipe as it expands, contracts, or moves slightly.

This flexibility prevents the seal from cracking or pulling away over time.

What roof types can it be used on?

The Master Flash Extreme Angle is ideally suited to steep metal roofs but can also be used on other roof types where the pitch makes standard flashings unsuitable.

How is it installed?

The cone is trimmed to fit the pipe size, then positioned over the penetration.

The aluminium base is pressed into shape to follow the contours of the roof, and the flashing is fixed and sealed with screws and roofing sealant to create a watertight bond.

What pipe sizes does it cover?

The stepped design allows the cone to be cut to fit a wide range of pipe diameters, from small conduits to larger flues.

This makes it a flexible option for different installations.

Is there a difference between EPDM and silicone versions?

Yes. The EPDM version is ideal for general roofing applications, while the silicone version is more suitable for high-temperature situations such as flues or chimneys.

How long will it last on a steep roof?

With proper installation, the Extreme Angle provides many years of reliable service.

Its weather-resistant materials ensure durability even in harsh or exposed conditions.

When should I choose the Extreme Angle instead of a standard flashing?

You should choose the Extreme Angle whenever you are working on a roof with a slope between 35° and 65°.

Standard flashings will not sit correctly on these pitches, making the Extreme Angle the best solution for a watertight seal.

Best Flashing for Steep Roofs