What’s the difference between Coroline and Onduline corrugated sheets?

Ariel Plastics offers a full range of corrugated bituminous sheets that are ideal for external roofing applications including stables and sheds.

There are a selection of colour options as well as stylish miniature profiles making Coroline and Onduline an excellent choice for garden roofing. View the full range here.

But what’s the difference between Coroline and Onduline corrugated sheets?

The biggest difference between Coroline and Onduline corrugated sheets is firstly the weight, followed by the thickness and price point. Our lowest priced black Onduline sheet is around £1.60 more than its Coroline equivalent. Both products are heavier duty than lower quality counterparts available on the market, however, Onduline is slightly heavier (3.3kg/m2 compared to 2.9kg/m2). It is also thicker (3mm compared to 2.6mm). When considering projects on taller buildings, builds where the roof sheets will be exposed or where there is a higher wind loading, Onduline is the more substantial product in these conditions.

Onduline is also BBA approved whereas Coroline is not. Although not an issue for the type of applications normally associated with these roof sheets, it may occasionally be a factor.

Where Onduline and Coroline are the same…

Other than the points mentioned above, there is very little difference between these superior roof sheets.

Onduline and Coroline sheets are both tough roofing and cladding materials. They are manufactured from bitumen saturated organic fibres. These fibres have been exposed to intense pressure and heat, helping to provide the long lasting durability.

A 15 year waterproofing guarantee is available on both products.

The roof sheets offer excellent colour-retention properties compared to inferior brands. This is thanks to a colour pigment and resin impregnation process that ‘stains’ the colour into the sheet which is used to finish the products. Enhanced UV resistance is another benefit as a result of this process.

Both sheets are available in four colours; black, brown, green or red. The translucent PVC sheet provides an economical way of gaining light transmission through your roof.

The hard-wearing material is free from asbestos and is non-toxic. This delivers an environmentally friendly and attractive solution for domestic roofing projects and commercial and agricultural buildings. A range of matching accessories including polythene eaves fillers, verge and ridge pieces and fixings, is available.


The table below highlights sheet properties in Coroline, Onduline and Onduline Mini.

Sheet size 2000mm x 950mm 2000mm x 950mm 2000mm x 866mm
Cover width 855mm 855mm 768mm
Thickness 2.6mm 3mm 2.6mm
Sheet weight 5.6kg 6.4kg 5.8kg
Material weight 2.9kg/m2               3.3kg/m2 3.4kg/m2
Corrugation 38mm Height95mm Width 38mm Height95mm Width 24mm Height48mm Width


For further information contact the Roofing Superstore team.