How to Measure for a Roof Lantern: Step-by-Step Guide
- Tom Warren
- May 12
- 1 min read
Measuring Up: Ensure Your Roof Lantern Fits Perfectly
Ordering a roof lantern is exciting – but accurate measurements are key. Whether you're replacing an existing unit or cutting a new opening, here’s how to measure for a perfect fit.
Step 1: Internal vs External
Are your measurements based on internal ceiling space or external kerb dimensions? Stratus Lanterns are sized to external kerb dimensions.
Step 2: Measure the Kerb Opening
Measure the external edge-to-edge dimensions of your upstand or kerb. Note the width and length in millimetres or centimetres.
Step 3: Allow for Overhang
Most lanterns overhang the kerb by a small margin to ensure weatherproofing. Check with us if unsure – we’re happy to guide you.
Step 4: Choose the Style
From 2-way rectangular designs to square pyramid lanterns, your measurement may suit multiple styles. Our team can help you select the most suitable shape.
Final Tip:
When in doubt, always double-check. Or send us your roof plans – we can recommend the ideal Stratus Roof Lantern for your project.


$50
Product Title
Product Details goes here with the simple product description and more information can be seen by clicking the see more button. Product Details goes here with the simple product description and more information can be seen by clicking the see more button

$50
Product Title
Product Details goes here with the simple product description and more information can be seen by clicking the see more button. Product Details goes here with the simple product description and more information can be seen by clicking the see more button.

$50
Product Title
Product Details goes here with the simple product description and more information can be seen by clicking the see more button. Product Details goes here with the simple product description and more information can be seen by clicking the see more button.
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