Box Profile vs Corrugated Sheeting: The Key Differences
Box profile and corrugated are the two most popular single skin roof sheeting profiles in Ireland. Both are widely used for agricultural, commercial and residential buildings — but they have different structural characteristics, appearances and typical applications. Here's what you need to know.
What Is Corrugated Roof Sheeting?
Corrugated sheeting has a traditional wave or sinusoidal profile — the familiar rounded ridges that have been used on farm buildings across Ireland for generations. It is a versatile, cost-effective option widely used for:
- Agricultural sheds and outbuildings
- Farm extensions and lean-tos
- Domestic garages and garden buildings
- Re-roofing older corrugated structures
Standard corrugated sheeting is available in a wide range of gauges (0.4mm to 0.7mm), colours and coatings. The 0.6mm polyester-coated version is the specification required for TAMS II grant eligibility on agricultural buildings.
What Is Box Profile Roof Sheeting?
Box profile sheeting has a trapezoidal or square-edged rib profile that provides a more modern, clean-lined appearance. It offers slightly greater structural rigidity than corrugated sheeting of the same gauge, which can allow for wider purlin spacings in some applications. Box profile is popular for:
- Commercial and industrial buildings
- Agricultural buildings where a modern appearance is preferred
- Re-roofing projects where a more contemporary finish is desired
- Grant approved agricultural buildings (TAMS II approved versions available)
Key Differences at a Glance
- Appearance: Corrugated has a traditional rounded wave profile. Box profile has a sharper, more modern trapezoidal shape.
- Strength: Box profile generally offers marginally greater rigidity at the same gauge due to its deeper rib geometry.
- Cost: Both profiles are similarly priced at equivalent gauges. Box profile may cost slightly more at the same specification.
- Application: Corrugated is the traditional choice for agricultural use. Box profile is more common on commercial and industrial projects.
- Grant eligibility: Both corrugated and box profile are available in TAMS II approved specifications (0.6mm, Slate Grey or Juniper Green) from O'Connor Roofing.
Which Should You Choose?
For most agricultural projects — farm sheds, barns, livestock buildings — corrugated sheeting remains the most practical and cost-effective choice. It is compatible with existing structures when re-roofing, widely available, and simple to install.
For commercial, industrial or more aesthetically-focused agricultural projects, box profile provides a cleaner modern appearance and is widely specified by architects and contractors on new builds.
If you are applying for a TAMS II agricultural grant, both profiles are available in the approved specification — the choice is largely down to personal preference and the look you want for the finished building.
Gauges and Coatings Explained
Both corrugated and box profile sheeting are available in multiple gauges:
- 0.4mm — light duty, suitable for domestic outbuildings and low-load applications
- 0.5mm — standard domestic and light agricultural specification
- 0.6mm — heavy agricultural / TAMS II approved specification
- 0.7mm — heavy duty commercial and industrial specification
Coatings available include galvanised, plastisol (PVC coated) and polyester. Polyester coated steel offers a cost-effective, durable finish in a wide range of colours. Plastisol/PVC coated provides a thicker coating with enhanced weather resistance and a wider colour range for premium applications.
Available Colours
Both profiles are available in a wide range of standard colours including Slate Grey, Juniper Green, Van Dyke Brown, Merlin Grey, Anthracite, Goosewing Grey and more. Contact O'Connor Roofing for a full colour chart and availability.
Frequently Asked Questions
Can I mix corrugated and box profile on the same building?
It is generally not recommended to mix profiles on the same roof as they require different flashings and will have a different visual appearance. However, it is common to use one profile for the roof and another for cladding/wall sheets where different aesthetics are acceptable.
What is the standard length for corrugated and box profile sheeting?
At O'Connor Roofing, all sheeting is cut to your required length — there is no standard fixed length. We cut from 1.8m up to 12m (or longer for specialist orders) to minimise waste and make installation easier.
Which profile is better for a farm shed?
Both are well-suited to agricultural use. Corrugated is the traditional choice and is generally the most cost-effective. If you are claiming the TAMS II grant, both profiles are available in the approved 0.6mm polyester specification in Slate Grey and Juniper Green.
Get a Quote for Box Profile or Corrugated Sheeting
Contact O'Connor Roofing Supplies to discuss your project and get a competitive quote. We supply trade and retail customers throughout Ireland with fast turnaround and nationwide delivery.
Phone: 042 937 6314 | Email: info@oconnorroofing.ie
Rampark, Jenkinstown, Dundalk, Co. Louth, A91 XC94
