Replacement Skylight Domes

| Round, Square & Rectangular Replacement Domes

Has your skylight dome/roof cover become yellow, cracked, brittle or damaged by hail? Replacing just the roof dome is often the quickest and most affordable way to restore your skylight.

At Skybrite Skylights we supply replacement skylight domes in a wide range of Australian sizes. Simply identify your existing dome using measurements rather than the skylight brand, making it easy to replace domes from older, discontinued and unbranded skylights.

Why Choose Skybrite Replacement Domes?

  • Suitable for many older, discontinued and unbranded skylights
  • Identify replacement domes by measurements, not brand names
  • Large range of round, square and rectangular dome sizes
  • High-impact and standard acrylic options available
  • Australia & New Zealand wide delivery
  • Assistance available if you’re unsure which replacement dome you need
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Common Reasons Skylight Domes Need Replacing

Skylight domes commonly need replacing due to hail damage, cracking, yellowing from UV exposure, impact damage, or age-related brittleness. In many cases the skylight base can remain in place, allowing only the dome to be replaced. Identifying the correct replacement is usually based on measurements rather than the skylight brand.

Benefits of Replacement Skylight Domes

There are several common reasons why a skylight dome may need replacement:

Damage
Skylight domes are exposed to the elements and can be damaged by hail, falling debris, or severe weather. A cracked or broken dome should be replaced promptly to maintain the skylight’s integrity, prevent leaks, and avoid further structural issues.

Age and Wear
Over time, domes can deteriorate due to prolonged exposure to sunlight and environmental conditions. They may become discoloured, brittle, or develop surface cracks. Replacing an aged dome restores both the appearance and performance of your skylight.

Energy Efficiency
Older domes often lack the insulation performance of modern designs. Upgrading to an energy-efficient replacement can reduce heat loss in winter and minimise heat gain in summer, improving comfort while lowering energy costs.

Design and Functionality Upgrades
Replacement domes provide the opportunity to modernise your skylight. New options are available in a variety of shapes, sizes, and materials, allowing you to select a style that enhances your home’s architecture and optimises natural light.

Replacing a skylight dome may be necessary to address damage, restore performance, improve energy efficiency, or update the look of your skylight. Choosing a genuine, high-quality replacement dome that is compatible with your existing system ensures proper installation, reliable performance, and long-term durability.

| Round skylight dome replacement models
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Measuring a Round Replacement Skylight Dome

To ensure a correct fit, follow these steps when measuring for a round replacement skylight dome:

Measure the Diameter
Using a tape measure, record the width of the existing dome from edge to edge, passing through the center. This provides the overall diameter from flange to flange.

Measure the Flange
The flange is the lip or edge of the dome that rests on the roof flashing. Measure its width across to confirm that the replacement dome will seat securely on your existing skylight flashing.

Measure the Height
Record the vertical height of the dome from the base to the highest point. This ensures you select a replacement with a suitable profile.

Note Additional Features
If the dome includes special features—such as a ventilation opening or integrated shading—be sure to record these details so the replacement meets your functional requirements.

Check for Obstructions
Inspect the roof area for nearby vents, pipes, or structures that could affect the fit or installation. Confirm that the new dome will sit properly without interference.

Once you have gathered these measurements, select a replacement skylight dome that matches your existing unit’s dimensions and features. If you are uncertain, we recommend consulting with a Skybrite professional to ensure the correct fit for your skylight model.

round skylight dome replacement
Skybrite Skylights detailed skylight dimensions guide
square skylight dome replacement

Square and Rectangle Skylight Dome Replacement

For the most accurate match, measure the existing skylight dome from outer edge to outer edge (flange to flange) for both the length and width. This is the best measurement to use when selecting a replacement dome, as Skybrite replacement domes are listed by their overall edge-to-edge dimensions.

If the existing dome is broken, missing, or cannot be measured accurately, you can also measure the base opening (throat size). This is a useful backup measurement and can help us identify the correct replacement, but wherever possible, the existing dome’s edge to edge measurement should be obtained first.

If you’re unsure, send us your measurements and photos through our Identify Your Skylight service and we can help confirm the closest match before ordering.

Note Additional Features
If the dome includes special features—such as a ventilation ring or integrated shade—make sure to record these details to ensure the replacement dome meets your requirements.

Once you have these measurements, you can select a replacement skylight dome that matches both the dimensions and features of your existing unit.

Skybrite offers an extensive range of replacement domes to suit many different makes and models.

How to Install Replacement Skylight Domes

Installing a replacement skylight dome generally involves removing the old dome, preparing the area, and fitting the new one. Follow these steps as a general guide:

Prioritise Safety
Before beginning, ensure you have appropriate safety equipment such as gloves and safety glasses. Use a stable ladder or scaffolding for secure access to the skylight.

Remove the Existing Dome
Carefully undo the screws or fasteners securing the old dome. Keep track of their placement and order to assist with reinstallation.

Clean the Skylight Area
Clear away any debris, dirt, or old sealant from around the skylight opening. The surface must be clean and dry to ensure a proper seal for the new dome.

Inspect the Flashing
Check the skylight flashing for signs of wear, damage, or deterioration. Repair or replace any affected components before installing the new dome.

Position the Replacement Dome
Place the new skylight dome over the flashing, ensuring it is properly centered and aligned.

Secure the Dome
Insert the screws or fasteners through the dome’s pre-drilled holes into the frame. Tighten them evenly and securely, but avoid over-tightening to prevent damage to the dome, flashing, or rubber grommets (if applicable).

Note: Installation procedures may vary depending on the specific skylight and dome model. Always follow the manufacturer’s instructions for the best results.

Acrylic vs Polycarbonate Skylight Domes

Acrylic and polycarbonate are the two most common materials used for replacement skylight domes. Acrylic provides excellent light transmission, UV stability and long-term weather resistance, making it the most popular choice for many residential skylights.

Polycarbonate offers significantly higher impact resistance, making it a good option for areas prone to hail or where extra durability is required. Both materials are designed for outdoor use and provide many years of reliable performance when correctly installed.

If you’re unsure which material is best for your skylight, we’re happy to help recommend the most suitable option.

Can I replace just the skylight dome?

In many cases, yes. If your existing skylight base is still in good condition, only the damaged or yellowed dome may need replacing. Replacing just the dome is often quicker, more affordable, and avoids unnecessary roof work. The correct replacement is determined by the existing dome size and fixing method rather than the skylight brand.

How do I measure a round replacement skylight dome?

Measure the dome edge-to-edge across the widest point (diameter). Also measure the skylight throat/roof opening to confirm the model and compatible parts.

Are your dome sizes listed edge-to-edge or nominal?

All replacement skylight domes on our site are listed by edge-to-edge measurements.

What materials are available?

We supply acrylic and polycarbonate domes. Both are UV-resistant; polycarbonate offers higher impact resistance, while acrylic provides excellent optical clarity.

Can I replace a skylight dome if I don't know the brand?

Yes. In many cases, a replacement skylight dome can be identified by its measurements and fixing method rather than the original brand or model. This is particularly useful for older, discontinued or unbranded skylights. Measure the existing dome carefully and compare the dimensions with the replacement specifications before ordering.

How do I know which replacement skylight dome will fit?

Start by measuring the existing dome edge-to-edge and checking the way it attaches to the skylight base or flashing. Where possible, also measure the roof opening or throat size. If you’re unsure, Skybrite’s Fit Check service can help confirm compatibility from your photos and measurements before dispatch.

Can I replace a hail-damaged skylight dome without replacing the whole skylight?

Very often, yes. If hail has damaged the dome but the skylight flashing, base and other components remain in good condition, the dome can often be replaced separately. Inspect the existing skylight for additional damage before ordering a replacement.

Can Skybrite identify my replacement skylight dome from photos?

Yes. If you’re unsure which replacement dome you need, send Skybrite clear photos of the existing skylight together with any measurements you can obtain. Photos of the dome, flashing and fixing method can help narrow down the correct replacement.

What if my skylight dome is broken or missing and I can't measure it?

If the original dome is missing or too damaged to measure accurately, measure the skylight base or roof opening instead and take clear photos of the existing flashing and fixing points. These measurements can help determine the size and type of replacement dome required.

Do I need to replace a yellow or cloudy skylight dome?

Yellowing, cloudiness, brittleness and surface cracking can indicate that an older skylight dome has deteriorated after prolonged exposure to sunlight and weather. Replacing an aged dome can restore light transmission and reduce the risk of further cracking or failure.

High-Impact Acrylic Skylight Domes

High-impact acrylic is a specially modified acrylic designed to provide greater impact resistance than standard acrylic. During manufacture, impact modifiers are added to increase strength and durability while maintaining excellent optical clarity.

Compared with standard acrylic, high-impact acrylic is less likely to crack or shatter from hail or accidental impact. It also offers excellent UV stability, weather resistance and long-term performance, making it an ideal material for replacement skylight domes.

All Skybrite Skylight domes meet Australian Standards.

Related Searches

People looking for replacement skylight domes also search for:

  • Broken skylight replacement
  • Skylight dome replacement
  • Skylight cover replacement
  • Yellow skylight dome
  • Cracked skylight dome
  • Hail damaged skylight
  • Replacement skylight cover
  • Skylight spare parts

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