- HEP Roofing
- Custom Skylight Cut-in

Custom Skylight Cut-in
Custom Skylight Cut-in | Metal Roofing | Roofing | Mascot
Discover how HEP transforms dull, overheated roof spaces in Mascot into vibrant, sun-drenched interiors with precision skylight cut-ins. Our experienced technicians seamlessly integrate custom skylights into existing metal roofing, bringing in abundant natural light while preserving the roof’s strength and weatherproofing. Each project is laser-measured, custom-flashed and meticulously sealed, so you enjoy stunning daylight without a hint of leaks, rattles or thermal transfer.
From first consultation to final cleanup, HEP handles everything in-house—design, fabrication, installation and compliance—so your renovation stays on schedule and on budget. Homeowners, architects and facility managers across Mascot rely on our local expertise to boost property value, slash energy costs and create uplifting spaces that feel bigger and brighter. When you want a flawless skylight cut-in that complements your metal roofing and stands up to Australia’s toughest conditions, count on HEP to let the sunshine in.
FAQs
What exactly is a custom skylight cut-in for a metal roof?
A custom skylight cut-in involves measuring, fabricating and flashing a skylight opening specifically for your existing metal roof profile (e.g. Colorbond, Zincalume, Klip-Lok). Unlike off-the-shelf kits, we match the skylight frame, saddle flashings and pan flashings to the rib spacing, pitch and sheet gauge of your roof, delivering a flush, watertight fit without visible step-downs or packers.
Will cutting into my metal roof cause leaks or void my roof warranty?
Not when it is done correctly. We remove a section of sheeting, install purpose-built apron, side and back flashings, then seal with compatible neutral-cure silicones and butyl tape. Because we use the same base metal thickness and finish as your roof, galvanic corrosion is avoided. All workmanship is backed by our 10-year installation warranty and keeps manufacturer warranties intact, provided the roof is still within its original warranty period.
Do I need council approval in Mascot for a skylight cut-in?
Most residential skylights fall under NSW Exempt Development if the opening is under 2m² and the skylight is non-trafficable, meaning no formal Development Application is required. However, Mascot is governed by Bayside Council, and heritage items or strata schemes may need consent. We confirm compliance with the State Environmental Planning Policy (Exempt and Complying Development Codes) 2008 and lodge any building works notifications when required, ensuring you stay fully compliant.
How long will installation take and what disruption should I expect?
A single custom skylight on a standard single-storey metal roof is usually installed in one day. We arrive after peak traffic to minimise noise impact, erect roof-edge protection, remove the roof sheet, fit the skylight and flashings, then clean up. Interiors are tarped to catch debris, and any ceiling plaster and painting is normally finished by our team the following day. Power and water remain connected throughout.
What does a custom skylight cut-in cost on a metal roof?
Pricing starts from about $2,400 (incl. GST) for a fixed 400 mm x 800 mm skylight in a single-storey home. Costs vary with skylight size, glazing type (double-glazed, low-E, laminated), roof pitch, height (scaffold requirements), and whether internal light shafts or electric blinds are added. After a free site inspection in Mascot we supply a fixed-price quote so there are no surprises.
How will a skylight affect energy efficiency and comfort in Mascot’s climate?
Modern skylights use high-performance glazing that blocks up to 80 % of summer heat while admitting abundant natural light, reducing reliance on artificial lighting. Optional ventilated models or solar-powered opening units promote passive ventilation, releasing trapped roof-space heat during Mascot’s warm, humid summers. In winter, double-glazed units help retain warmth. Many clients see lighting energy savings of 10–15 % and experience improved indoor air quality year-round.