What is a Chimney Flashing?

A chimney flashing will weatherproof a chimney by covering the intersections between the tiles or slates to prevent the ingress of water. To ensure maximum protection, it is also recommended to install a damp proof course (DPC) along with your chimney flashing.

Why does a chimney have flashing?

A correctly installed chimney flashing will prevent rain from seeping into your roof and should last for decades if correctly installed.

Other benefits of chimney flashing include:

  • Protecting from water damage
  • Preserves the chimney structure by reducing mortar erosion caused by mortar
  • Improved the homes energy efficiency by reducing heat loss and preventing drafts
a house with a tiled roof and chimney flashings

Types of chimney flashing

Chimney flashings can be made out of several different metals, including copper, aluminium, galvanised steel and lead, lead is arguably the best material for chimney flashing due to its long life expectancy. A minimum of code 4 lead should be used for lead flashings.

You can install different types of chimney flashing such as front aprons, side flashings, back gutters, cover flashings and ridge abutment saddles.

Chimney DPC Tray (Damp proof course)

A DPC tray is used to stop water that has already penetrated through soaking into the brickwork below. Our DPC chimney tray is coated with bitumen paint on the upper surface to help protect the lead from possible corrosion caused by cement in direct contact with its surface. It is fitted during the construction of the chimney and acts as a barrier to water seeping through the brickwork.

chimney dpc tray

Chimney Front Apron

A front apron is designed to form a water proof bridge between the sides, front and back of the chimney. They come in full or half sizes and can be fitted overlapping, left or right handed, or to flash a chimney on a gable end where the excess can be trimmed and folded to suit.

chimney front apron

Chimney Back Gutter

A chimney back gutter covers the rear section of the chimney. This allows water to flow from the tiles and around the chimney without seeping into the joins. When a projection occurs in a roof the water must be diverted.

chimney back gutter

Lead is an excellent material to choose for chimney flashing, Leadworx is one of the UK’s leading suppliers of quality lead roofing products including chimney flashing and bat access tiles

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