Install custom metal flashing that matches your roof profile, seal all edges with silicone sealant, and ensure proper overlap to direct water away from the skylight opening. Tomkat Roofing’s approach prevents leaks and protects your roof’s integrity through precise fabrication and expert installation.
Flashing a Skylight on a Metal Roof?
The flashing has to match the corrugated profile and seal at every edge, or it leaks. Our Sydney team can flash your skylight properly the first time.
What Is Skylight Flashing Installation and Why Does It Matter?

- Waterproof barrier - Flashing creates a sealed junction between the skylight frame and metal roof panels, preventing water infiltration during heavy rain
- Profile matching - Custom flashing must conform to your specific metal roof profile (corrugated, standing seam, or ribbed) for proper fit
- Layered protection - Install base flashing first, then step flashing on sides, and head flashing last to create overlapping water channels
- Sealant application - High-grade silicone or butyl tape seals all flashing edges and fastener penetrations against moisture entry
- Long-term durability - Proper installation prevents rust, rot, and ceiling damage that costs thousands to repair later
Why Should You Care About Professional Skylight Flashing?

- Sydney weather demands - Heavy rainfall and storms require expert waterproofing techniques specific to Australian climate conditions
- Colorbond compatibility - Professional installers use matching Colorbond flashing that coordinates with your existing roof colour and material grade
- Licensed expertise - Our metal roofing Sydney specialists ensure compliance with Australian building standards and manufacturer warranties
- Avoid costly mistakes - DIY flashing errors cause internal water damage, ceiling stains, and voided skylight warranties within months
- Safety assurance - Working on metal roofs requires proper safety equipment and training to prevent falls and injuries
How Does Tomkat Roofing Handle Skylight Installation Differently?

- Comprehensive inspection - We assess roof structure, pitch, and existing waterproofing before recommending skylight placement and flashing solutions
- Custom fabrication - Our team fabricates precise flashing pieces on-site that perfectly match your metal roof's unique profile and dimensions
- Quality materials only - We exclusively use genuine Colorbond steel and premium sealants designed for Australian conditions and backed by manufacturer warranties
- Meticulous installation - Every fastener placement, overlap measurement, and seal application follows strict protocols to eliminate potential leak points
- Post-installation guarantee - We conduct thorough inspections with homeowners and provide detailed maintenance guidance to ensure lasting performance
Don’t risk water damage from improper skylight flashing Tomkat Roofing’s licensed specialists deliver waterproof installations backed by comprehensive warranties. Get In Touch today for your free inspection and expert assessment.
Frequently Asked Questions
Can you install a skylight on an existing metal roof?
Yes. A skylight can be retrofitted to an existing corrugated metal roof, with the opening cut between the ribs and profile-matched flashing fitted around it. The key is sealing it to suit the roof profile so it stays watertight.
What type of flashing is best for a metal roof skylight?
A purpose-made flashing kit that matches your roof’s corrugation profile is best, with an apron at the base and soakers up the sides. Generic or flat flashing on a corrugated roof is where most leaks start.
What causes skylight flashing to leak?
Flashing that does not match the roof profile, poor or aged sealant, laps running the wrong way, and rushed installation are the usual causes. Water finds any gap, so the detail and the sealing matter most.
How is flashing fitted around a skylight on a metal roof?
The skylight is set in place, then the flashing is worked to match the corrugations, lapped correctly with the sheeting so water sheds over it, and every edge is sealed with a quality weatherproof sealant.
Should skylight flashing be installed by a professional?
It is strongly recommended. Cutting the metal accurately and fitting profile-specific flashing that stays watertight at height is skilled work, and flashing mistakes show up quickly as leaks. A licensed roofer gets it right the first time.
Get the Flashing Done Right
A skylight on a metal roof lives or dies by its flashing. Our team fits profile-matched flashing and seals it so it stays watertight for years.
