Apron Flashings in Auckland — Custom Made & Powder Coated

What Are Apron Flashings?

An apron flashing is a formed metal piece that bridges the junction between a roof surface and the wall above it. This junction — where a lower roof plane meets a vertical wall — is one of the most common locations for water ingress in New Zealand buildings. Without a correctly installed flashing, water runs down the wall and finds its way into the gap between the roof and the wall, tracking into the building structure.

The apron flashing has two parts: a wall section (called the upstand) that is fixed to and sealed against the vertical wall, and a roof section (the apron or skirt) that laps over the roofing material below. Water running down the wall is deflected by the upstand onto the roof apron and then down the roof slope to the gutters.

Apron flashings are typically continuous pieces spanning the full width of the junction. Where the wall is long or where thermal movement is a consideration, the flashing may be installed in sections with overlapping joints. We manufacture apron flashings to your specified dimensions in your choice of material and colour.

Where Are Apron Flashings Used?

• At the base of walls where they meet a lower lean-to or verandah roof
• Around chimney bases on the uphill side (the downhill side uses a back gutter flashing)
• At dormer walls where they sit on a main roof surface
• At the junction of a house wall and a carport or garage roof below
• Wherever a lower roof butts against a wall at any point other than the ridge

Materials Available

We manufacture apron flashings in the following materials:

• Galvanised Steel — traditional zinc-coated steel, suitable for a wide range of applications
• Aluminium — lightweight with excellent corrosion resistance, good choice for coastal environments
• Colorsteel (pre-painted) — pre-painted to standard roofing colours for an integrated look
• Stainless Steel — superior corrosion resistance for demanding environments

Profile Options

All apron flashings are manufactured to order. Key dimensions are the upstand height (up the wall), the apron width (onto the roof), and any kick-out or drip edge at the roof edge. We work from drawings, sketches, or samples.

Colour Options

Powder coating is available on all steel and aluminium apron flashings. Available colours include:

• The full Colorsteel colour range
• Resene colour matching
• Dulux colour matching
• Full RAL colour range
• Custom colour matching from a physical sample

Who Uses Apron Flashings?

Our apron flashing customers include:

• Builders — detailing roof-to-wall junctions on lean-to additions, verandahs, and new builds
• Roofers — replacing failed apron flashings on existing buildings during re-roofing work

NZ Building Code Considerations

Flashings play a critical role in meeting the weathertightness requirements of the New Zealand Building Code. Apron flashings must have a sufficient upstand height on the wall, be properly sealed at the top edge, and have adequate lap onto the roofing below. The roofing material under the apron must also be correctly installed to direct water down the slope. Always consult your building consent documentation for specific requirements.

Related Flashings

Apron flashings work alongside other types in a complete weathertight roof and wall system:

• Roof Flashings — the broader family of weathertight junction profiles for roofs
• Window Flashings — for openings in the same wall above the apron junction
• Barge Flashings — for the gable-end rakes of the lean-to or verandah roof
• Valley Flashings — for internal junctions where two roof planes meet

Frequently Asked Questions