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Custom Flashings for Flat Roof Velux Skylights

These custom base flashings for Velux skylights are designed to fit perfectly on any roof, providing a secure and weatherproof seal. With precision engineering and high-quality materials, they offer reliable protection for your skylight, giving you peace of mind and enhancing the longevity of your investment.

Custom Flashings for Flat Roof VELUX Skylights Melbourne

Choose the right custom flashing for VELUX flat roof skylights, including FCM fixed skylights, VCM manual opening skylights and VCS solar opening skylights. Flat and low-pitch roofs need careful kerb, upstand, waterproofing and flashing detail, especially for replacement jobs and Melbourne roof conditions.

Ask What Flashing You Need View FCM Skylights Pickup from Noble Park
Made for VELUX Flat Roof Flashing support for FCM, VCM and VCS skylight sizes.
Kerb & Upstand Detail Important for flat and low-pitch roof waterproofing.
Replacement Support Useful when upgrading old acrylic dome skylights.
12,000+ Installations Melbourne skylight experience since 2018.

When do you need custom flashing?

Custom flashing is often required when installing or replacing a VELUX flat roof skylight on a flat or low-pitch roof. It helps connect the skylight, kerb or upstand to the surrounding roof so water is directed away correctly.

New FCM installations Fixed flat roof skylights need correct kerb, waterproofing and flashing detail.
Opening flat roof skylights VCM and VCS skylights need careful flashing around the opening frame.
Dome replacements Old acrylic dome skylights often need roof preparation and custom flashing.
FCM Flat Roof Skylights Skylight Cost Guide Completed Projects

Flat roof and low-pitch roof suitability

Flat roof flashing is not one-size-fits-all. The right approach depends on the skylight model, roof material, roof pitch, kerb height, upstand, existing opening and whether the job is new installation or replacement.

  • Suitable for many VELUX FCM, VCM and VCS flat roof skylight applications.
  • Important for metal roof, low-pitch roof and replacement skylight jobs.
  • Should be matched to the skylight size and roof detail.
  • Best confirmed before ordering the skylight or cutting the roof opening.
Send us roof photos, skylight model, existing opening size and roof material before ordering. We can help check which flashing option is suitable.
VELUX FCM VELUX VCM VELUX VCS

Match the flashing to the skylight model and size

The flashing should match the VELUX flat roof skylight model and size. For example, an FCM 1430 needs a different flashing size from an FCM 4646. Always confirm the model code before ordering.

  • FCM: fixed flat roof skylight, daylight only.
  • VCM: manual opening flat roof skylight for daylight and ventilation.
  • VCS: solar opening flat roof skylight for daylight and convenient ventilation.
1430 Flashing 2222 Flashing 2246 Flashing 3030 Flashing 4646 Flashing

Supply only, pickup, delivery or installed

Central Skylights can help with supply-only custom flashings, VELUX flat roof skylights, pickup from Noble Park, local delivery and full VELUX skylight installation services across Melbourne.

  • Supply only: suitable for builders, roofers and owner-builders.
  • Replacement jobs: useful when upgrading an old dome to VELUX.
  • Installed: suitable if you want roof work, skylight installation and shaft planning handled properly.
Request a Quote VELUX Supply Only Melbourne Service Areas Contact Central Skylights

Custom flashing size guide for VELUX flat roof skylights

Use this table as a practical guide when matching custom flashing to common VELUX flat roof skylight sizes. Always confirm your skylight model and actual roof opening before ordering.

Flashing / model size Approx. skylight size Compatible model families Common use
1430 Flashing 460 x 870mm FCM / VCM / VCS where applicable Small bathrooms, robes, laundries and hallways
2222 Flashing 665 x 665mm FCM / VCM / VCS where applicable Compact square skylight replacement or small room daylight
2230 Flashing 665 x 870mm FCM / VCM / VCS where applicable Bathroom, laundry, hallway or compact kitchen
2234 Flashing 665 x 985mm FCM / VCM / VCS where applicable Medium bathroom, kitchen, dining or laundry
2246 Flashing 665 x 1275mm FCM / VCM / VCS where applicable Kitchen bench, hallway, dining or laundry
3030 Flashing 870 x 870mm FCM / VCM / VCS where applicable Kitchen, bathroom, stairwell or living area
3046 Flashing 870 x 1275mm FCM / VCM / VCS where applicable Kitchen, dining, family room or extension
3434 Flashing 985 x 985mm FCM / VCM / VCS where applicable Living room, dining, kitchen or extension
4646 Flashing 1275 x 1275mm FCM / VCM / VCS where applicable Large living room, open-plan area or feature skylight
Tip: do not order flashing by rough room size only. Confirm the exact VELUX model code, roof opening and roof type first.

Kerb, upstand and waterproofing detail

Flat roof skylight flashing is only one part of the installation. The kerb or upstand, roof membrane, backflash, side flashing and water path must work together. This is especially important on low-pitch roofs where water does not drain as quickly as a steep pitched roof.

Kerb height The skylight needs a suitable raised base or upstand to help keep water away from the frame.
Roof material Metal deck, membrane, low-pitch roof and existing dome replacements can all require different details.
Water direction Flashing should direct water around and away from the skylight, not trap it behind the frame.
Skylight Installation Services Send Photos for Advice Cost Guide

Which skylight does this flashing suit: FCM, VCM or VCS?

Many custom flashing products are made to suit VELUX flat roof skylight families such as FCM, VCM and VCS. The right choice depends on whether the skylight is fixed, manual opening or solar opening.

VELUX model family Opening type Best for Related collection
FCM Fixed Daylight only for flat and low-pitch roofs VELUX FCM Flat Roof Skylights
VCM Manual opening Daylight and manual ventilation VELUX VCM Manual Opening Skylights
VCS Solar opening Daylight and convenient solar-powered ventilation VELUX VCS Solar Opening Skylights
If the skylight is for a room that traps steam or heat, compare VCM or VCS before choosing fixed FCM.

Replacing an old acrylic dome skylight

Custom flashing is often needed when replacing an old acrylic dome or polycarbonate skylight with a modern VELUX flat roof skylight. The existing opening may not match the new VELUX size exactly, and the old kerb or roof detail may need repair or modification.

  • Measure the outside dome size, throat/opening size and internal ceiling opening.
  • Take photos of the roof from outside and the ceiling from inside.
  • Check whether the old kerb is sound, level and suitable for a new VELUX skylight.
  • Confirm whether fixed FCM, manual VCM or solar VCS is the better replacement.
FCM Fixed Replacement VCS Solar Replacement Request Replacement Advice Completed Projects

Related VELUX flat roof skylight products

Custom flashing should be chosen together with the skylight, not as an afterthought. Compare the flat roof skylight families below before choosing your flashing.

VELUX FCM Fixed Flat Roof Skylights Fixed flat roof skylights when daylight is required but ventilation is not.
VELUX VCM Manual Opening Flat Roof Skylights Manual opening flat roof skylights for daylight and ventilation.
VELUX VCS Solar Opening Flat Roof Skylights Solar opening flat roof skylights for convenient ventilation.
VELUX Supply Only Melbourne Supply-only options for builders, roofers, owner-builders and renovators.
Skylight Installation Services Full Melbourne installation including roof work and shaft planning.
Skylights for Metal Roofs Product and flashing advice for Colorbond and metal roof applications.

Custom flashing for flat roof VELUX skylights FAQs

Do VELUX FCM skylights need custom flashing?

In many Melbourne flat roof and low-pitch roof situations, yes. The skylight needs correct kerb, waterproofing and flashing detail. See our VELUX FCM flat roof skylights collection before ordering.

Does the same flashing suit FCM, VCM and VCS?

Some custom flashing options are made for matching VELUX FCM, VCM and VCS size families, but you should confirm the exact model, size and roof detail before ordering.

Can custom flashing help replace an old dome skylight?

Often, yes. Old acrylic dome replacements usually need the existing roof opening, kerb and waterproofing checked before the new VELUX skylight and flashing are selected.

What information should I send before ordering?

Send the VELUX model code, roof photos, internal ceiling photos, existing skylight measurements, roof material and whether the job is new installation or replacement.

Can I buy flashing supply only?

Yes. Central Skylights can help with supply-only VELUX skylights and custom flashings. Builders, roofers and renovators can also arrange pickup from Noble Park.

Can Central Skylights install the skylight and flashing?

Yes. Central Skylights can supply and install VELUX flat roof skylights and custom flashings across Melbourne. You can also read our skylight installation cost guide before requesting a quote.

Need help choosing the right flat roof flashing?

Send us your VELUX model, roof photos, ceiling photos, roof material and existing opening size if it is a replacement. We can help check whether your project needs custom flashing and which size is likely to suit.

Request Flashing Advice Contact Central Skylights
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