- Matches the 13.5/3 corrugated profile
- Cut up to 6.1m lengths
- Strong and durable GRP
- Laps into the steel run
- Nationwide delivery within 7 days
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Follow our step by step calculator to get your steel roofing quote direct from Cardinal Steels
GRP Roof Lights in Corrugated Profile
Our corrugated roof lights are moulded in the same 13.5/3 form as our corrugated steel roof sheets, with the same 990.6mm cover width. That means a roof light replaces a sheet in the run rather than needing a separate opening formed in the roof.
On agricultural and rural buildings, where corrugated is the usual covering, this is how daylight is normally brought in without altering the roof structure.
Specification
- Matches the 13.5/3 corrugated profile
- 990.6mm cover width
- Custom cut up to 6.1m lengths
- Also available in box profile and Big 6 forms
Replacing old translucent sheets
Many older buildings were lit through translucent cement or early plastic sheets that have since yellowed, gone brittle or cracked. Replacing them with GRP in the matching profile restores the light without disturbing the surrounding roof.
Treat the old sheets as fragile and assume nothing about what they are made of.
Curves
Corrugated’s shallow, evenly distributed waves let a sheet take up a gentle curve, which is one reason it is still specified on older agricultural buildings. Our article on corrugated sheets on curved roofs sets out what is achievable.
See our main GRP roof lights page for the full range.
Everything is made to order at our Bromsgrove facility and cut to your exact sizes. Choose from plastisol, polyester paint or plain galvanised finishes in 16 colours, with nationwide delivery within 7 days and a 48-hour express option on request, subject to availability and additional charges.
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What Coatings Do We Offer?
We always recommend our PVC Plastisol-coated sheets due to their cost-effectiveness and excellent resistance to abrasion and corrosion. Polyester-coated sheets are also a high-quality, versatile option suitable for both box profile and corrugated roofing sheets. However, care must be taken to avoid scratching during handling and installation.

Galvanized
- Shiny/Dull silver colour in finish.
- Available in 0.4mm up to 0.7mm thickness.
- No Guarantee available.

Polyester
- Gloss finish.
- Available in 0.4mm up to 0.7mm thickness.
- Up to 15 years guarantee.

Plastisol
- Gloss finish.
- Available in 0.4mm up to 0.7mm thickness.
- Up to 25 years guarantee.
Tell us how many lights you need and where they sit in the run.
