Metal Roofing Sheet Size Guide: Corrugated, Box, Standing Seam & Tile Form Sheets

If you’re planning a roofing project and trying to work out which metal roofing sheet sizes will actually fit the job, good news: you’re in the right place. Whether you’re measuring up for the first time or double‑checking your calculations before ordering, getting the right sizes is essential.

And you have every reason to be asking that question. Without understanding the different lengths, widths, thicknesses and profiles available, it’s difficult to plan accurately, cost your project properly, or know how many sheets you’ll need.

By the end of this guide, you’ll have all the specifications you need for our  corrugated, tile form, standing seam, 32/1000 and 34/1000 box profile sheets, giving you the confidence to plan your project properly, whether it’s domestic, commercial, agricultural or industrial.

We’ll look at each Cladco roofing profile one by one, breaking down the available sizes and options for each, so you know exactly what to expect before you order.

• Box Profile Roofing Sheets
• Standing Seam Roofing Sheets
• Corrugated Metal Roofing Sheets
• Tile Form Roofing Sheets
• Conclusion

Box Profile Roofing Sheets

Our box profile roof sheets are made from coated galvanised steel and feature a distinctive square, box‑like profile. They’re available in two options: 32/1000 and 34/1000. One of the key differences between the two profiles is a 2mm variation in height, with 32/1000 profiles standing at 32mm and 34/1000 at 34mm. 

Another distinguishing feature is that the 32/1000 sheet has one fewer profile. In terms of coverage, however, both profiles provide exactly the same 1000mm coverage width when lapped. This larger gap between profiles on 32/1000 box profile sheets allows for greater drainage capacity, making them particularly well‑suited to roofs in wooded areas where persistent leaf fall and debris are less likely to cause blockages.

If you’re deciding between 32/1000 and 34/1000 box profile sheets, the right choice largely depends on where they’ll be installed. Typically, 32/1000 sheets are preferred in domestic and agricultural settings, where their lower profile creates a less industrial appearance while still providing a sturdy, reliable roof covering for everyday use.

34/1000 box profile sheets, on the other hand, tend to be the preferred choice for larger roof spaces. As well as offering a more industrial look, their tighter profile provides greater rigidity and strength, making them a reliable solution for buildings in more exposed locations.

To suit different applications and environments, box profile roof sheets are available in a range of finishes. For projects where colour choice is less of a concern, we supply traditional galvanised box profile sheets with a distinctive metallic finish. Polyester paint-coated and PVC plastisol-coated options offer additional protection against the elements, as well as a wider choice of colours.

When it comes to thickness, box profile sheets are manufactured in 0.5mm and 0.7mm options. Our 0.5mm sheets are most commonly used in metal wall cladding installations, while 0.7mm sheets are ideal for use as metal roof sheets.

For larger roof areas, Cladco box profile roof sheets can also be manufactured in a range of lengths, helping to make installation easier and more efficient. This can help reduce the number of joins and improve overall weather resistance. The maximum sheet length is 9m in 0.7mm thickness and 7m in 0.5mm.

Standing Seam Roofing Sheets

Known for their contemporary appearance and concealed fixing system, Cladco standing seam roofing sheets are a popular choice for architectural projects and domestic conversions. With a visual style similar to zinc roofing, these steel standing seam sheets use hidden fixings to create a clean, uninterrupted finish, making them a strong option for designs where a sleek, modern look and plenty of kerb appeal are key requirements.

Standing seam sheets are manufactured in two design options: with ribs and without ribs. The ribbed option features 1.5mm‑high ribs running the length of the sheet, which help to reduce drumming and oil canning (visible distortion in the sheet). This makes ribbed standing seam sheets a particularly popular choice for buildings in more exposed locations. The non‑ribbed version offers a smoother, more minimalist appearance and is often selected where visual impact is the primary consideration.

Suitable for roof pitches as low as 6°, each standing seam sheet provides a 500mm cover width when lapped. Sheets are available in lengths from 1.2m up to 8m, allowing flexibility across a range of roof sizes. For projects requiring longer runs, sheets can also be manufactured in lengths of up to 12m on request.

All Cladco standing seam sheets are coated in GreenCoat® Pural BT, a sustainable steel coating that offers excellent resistance to corrosion, scratches and weathering. Available in four colour options, the coating helps ensure long‑term performance alongside a high‑quality finish.

Corrugated Roofing Sheets

A popular metal roof sheet profile for nearly 200 years, corrugated sheets are instantly recognisable by their classic wavy design. Widely used in domestic, industrial and agricultural settings, the curved corrugations promote effective water run‑off, helping to prevent water pooling during heavy downpours. Low‑maintenance and cost‑effective, corrugated metal sheets are also commonly used as a durable wall cladding material.

Cladco corrugated roof sheets are manufactured in 0.5mm and 0.7mm thicknesses, with 0.5mm sheets most commonly used for cladding installations and 0.7mm sheets recommended for roofing projects. Sheets in 0.5mm thickness are available in lengths from 500mm up to 5m, while 0.7mm sheets can be manufactured in lengths from 500mm up to 7m.

Each sheet provides a 990mm cover width when lapped by one corrugation, which is the recommended overlap when installing corrugated roofing. This should be factored in when measuring and ordering, as it will affect the number of sheet runs required. Allowing for the correct overlap helps ensure effective weather protection and accurate material calculations.

Due to their profile shape, corrugated roofing installations also require additional under‑sheet support, such as purlins. Compared to alternative profiles like 34/1000 box profile sheets, corrugated sheets typically span shorter distances. Reducing the span in this way helps maintain structural strength and long‑term stability.

Corrugated sheets are available in plain galvanised for a rugged, industrial finish, as well as polyester paint‑coated and PVC plastisol-coated options. These coated finishes provide additional protection against the elements and offer a wider choice of colours, ranging from slate blue to goosewing grey.

Tile Form Roofing Sheets

Tile form roofing sheets offer a slightly different look to the other profiles covered in this guide, replicating the appearance of traditional pantiles while retaining all the practical benefits of steel. Designed primarily for roofing applications, they’re a popular choice for domestic and agricultural buildings where visual character is just as important as durability.

While tile form sheets share a gently contoured shape with corrugated profiles, they’re specifically designed to replicate the look of a traditional tiled roof. With a pantile‑style profile measuring 41mm from the peak of the wave to the base of the sheet, tile form sheets are recommended for roofing applications only, where their tiled appearance is most effective.

Suitable for roofs with a minimum pitch of 12°, Cladco tile form sheets are commonly used on domestic and agricultural buildings, from sheds and summerhouses to workshops and stables. Their pantile‑inspired design also makes them a strong choice for heritage projects, where maintaining the original character of a building is important.

Each sheet provides a 1000mm cover width when lapped and is manufactured in lengths ranging from 600mm up to 6m, helping to simplify installation while maintaining strength and durability across a wide range of roof sizes.

Tile form sheets are coated in GreenCoat® Pural BT, a tough and environmentally friendly steel coating that offers excellent resistance to corrosion and harsh weather conditions. Available in four colours, the coating delivers long‑term performance alongside a high‑quality finish.

Conclusion

Now that you’ve explored the full range of Cladco metal roof sheets, you should feel much more confident in choosing the right profile for your project. With several metal roofing options available, the best choice will depend on your location, the look you’re aiming for, and how the sheets will be installed. By understanding sheet sizes, coverage widths and application suitability, you’re now perfectly placed to plan your build with confidence.

To make things even easier, our easy‑to‑use Roofing Calculator can help you quickly work out the materials required, including fixings and accessories, and generate a no‑obligation quote in just a matter of minutes.

If you still have questions or would like a bit of extra guidance, our team is always happy to help. You can give us a call on 01837 659901, send us an email to [email protected] or visit our Help & Advice page for more information and practical support.