400mm Skylight Dome and Flashing Flat Pan
Images may show multiple components for illustration purposes. This listing includes only the specified item detailed below.
Detailed Dimensions
Coverage on both domes are identical and all fixings are included. The clear dome screws down onto the flashing. The prismatic dome screws into the side of the flashing.
400mm Corrugated Flashing Included
Choice of a Prismatic or Clear Skylight Dome Included
Internal Dome Size Prismatic = 420mm
Internal Dome Size Clear = 420mm
External Dome Size Prismatic = 450mm | Height 100mm and Shoulder 30mm
External Dome Size Clear = 495mm | Height 50mm and Shoulder 20mm
All replacement skylight domes and replacement skylight diffusers and covers are manufactured using the highest grade 3mm high impact UV stabilized acrylic sheeting, for superior clarity of light, resistance to discolouration, impacts and longevity.
Material and Durability
Domes: 3mm UV stabilised high impact acrylic
Diffusers: 2mm UV stabilised acrylic
• Clearer light
• Won’t yellow
• Impact resistant
• Long lifespan
Toughest skylight domes on the market
Available sizes: 400mm,500mm & 600mm
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- Heat & Hail Resistant
Quick Measuring Guides
Measuring Skylight Domes
• Remove the existing dome
• Measure the dome edge-to-edge at the widest point
• Measure the roof opening (throat) if the dome is missing or damaged
• Match the fixing style (screwed into the side or down onto the flashing)
View the full skylight dome measuring guide
Measuring Skylight Diffusers
• Identify the diffuser type (flat, domed, or vented)
• Measure across the diffuser diameter
• Check whether it twists and turns on or if it rests on the ceiling insert lip
• Match the finish (prismatic or frosted acrylic)
Measuring Skylight Shafts
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Remove the dome and measure the skylight base opening (roof level)
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Alternatively, remove the diffuser and measure the ceiling opening
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Measure the shaft drop (roof to ceiling distance)
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Keep the shaft straight and pulled tight for better light output
View the full skylight shaft measuring guide
Measuring Skylight Surrounds
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Identify the diffuser model to match the surround type
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Measure the ceiling opening (diameter or edge-to-edge for square)
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Measure the surround insert (upstand) that sits into the ceiling
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Overall size is more important than lip or flange detail
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Orders are processed Mon–Fri, 8:30am–5:00pm (AEST)
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Skybrite deliver via all major Australian carriers
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Delivery estimates may vary due to courier network delays, severe weather events, public holidays, or other factors outside our control
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Online store only — pick-ups are unavailable
Delivery Timeframes
Lead time to dispatch:
- 1–2 business days — In stock items
- 3–5 business days — Production required
- 5–12 business days — Custom (made to order)
Delivery after dispatch:
- Metro: 2–5 business days
- Regional: 6–10 business days
- Remote: 11–20 business days
Tracking details are emailed as soon as your order is booked with the courier for dispatch
| Need it fast? Email us to confirm lead times
Australia’s Spare Parts Specialists
Genuine replacement skylight parts for new, old and hard to identify skylight systems
Price range: $315.00 through $325.00
Brisbane dispatch | Tracked deliveries | Easy 30 day returns
Brisbane dispatch | Tracked deliveries | Easy 30 day returns
| Free Fit Check available before dispatch
| GST is calculated at checkout
Order Checklist
Fit check guarantee
We offer a Fit Check Guarantee. Send us a photo and measurements of your existing skylight set up and we’ll confirm fit before dispatch to help avoid incorrect orders.
What is included in this listing?
Each product listing includes the specific part named in the title and description only. Images may show multiple components for illustration purposes.
How long does dispatch and delivery take?
Most commonly stocked items are dispatched within 1–5 business days. Delivery time varies by location. Custom or made to order items may take longer.
Can I return or exchange this item?
Standard stocked items may be returned for a refund within 30 days if unused and in original packaging. Customers are responsible for return shipping costs unless the return is due to an error on our part.
Custom items are not eligible for return. These parts are clearly marked on the product page before ordering.
Are the parts DIY friendly?
The vast majority of replacement skylight parts are easily installed by DIYers. In certain cases for full skylight kits installations, we do recommend that you are are confident DIYer or a maintenance/trade professional.
The manufacturer’s warranty commences on the date of purchase (payment received) and covers defects in materials and workmanship for a period of seven (7) years under normal use.
Exclusions (not covered):
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Misuse, negligence, or abnormal/incorrect use of the product
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Improper, incomplete, or incorrect installation or fitment
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Normal wear and tear
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Change-of-mind returns
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Damage or defects arising from shipment by carriers
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Any attempt to repair, alter, or service the product by you or an unauthorised third party
This warranty applies only to the original purchaser and in accordance with the product’s intended purpose and installation guidelines.
Exclusions – Acts of God
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Eligible items may be returned within 21 days of receipt.
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Products must be unused, unmarked, in “as-new” condition, and in their original packaging.
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Return postage is paid by the purchaser.
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The original delivery fee is non-refundable.
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A 10% restocking fee (calculated on the original purchase price) applies.
Exclusions
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Special-order domes, larger custom dome orders, and Skylight kits are not eligible for a refund.
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In limited circumstances, a store credit may be considered.
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Orders that exceed 5 kg, have a large volumetric size, or are destined for remote/rural locations may incur additional freight charges in addition to the flat rate.
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Before dispatch, we will email you freight quotes, total cost, and payment terms. Any additional freight charges must be paid prior to dispatch.
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All orders ship with standard delivery cover. Optional transit insurance is available at the buyer’s discretion—please contact admin@skybriteskylights.com.au before your order is dispatched to request a quote and arrange payment.
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Non-cancellable once commenced: Special-order domes, custom domes, custom diffusers, and Skylight kits cannot be cancelled once work has begun.
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Costs on mid-process cancellations: If a non-standard stocked item is cancelled at any stage (ordering, manufacturing, packaging, or delivery), the customer must reimburse Skybrite Skylights for all costs incurred up to the time of cancellation (e.g., materials, labour, administration, freight, and third-party charges).
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The total order price is shown at checkout, inclusive of item price, GST, shipping, and any unavoidable or pre-selected fees.
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It is the purchaser’s responsibility to ensure all billing and delivery details are accurate before completing the order.
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If you require Skybrite to issue a manual invoice on your behalf, a small administration fee will apply.













