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Onduline

Onduline is an attractive, lightweight but extremely tough corrugated roofing and wall cladding material. Its proven weathering qualities coupled with the ease and safety with which it can be handled and fixed have resulted in it being used extensively on a wide range of buildings across the globe in all kinds of climatic conditions.

Since its development over 50 years ago Onduline has benefited from a continuing process of development and is now offered as a roofing system complete with a comprehensive range of accessories able to deliver effective solutions to many of your roofing needs.

The specification of Onduline is superior to any other bituminous based roofing sheet and the manufacturing process is to ISO 9001. The product's quality meets the most exacting international standards including BBA certification.

Onduline is available in 4 environmentally sensitive colours - red, green, brown and black.

Onduline sheets are manufactured using a 3mm homogenous base sheet of cellulose fibre which is then pre-pigmented with resin and colouring before being impregnated with bitumen asphalt under intense pressure and heat. This produces a sheet of high dimensional stability that will not de-laminate.

Onduline Dimensions  
Length 2000mm
Width 950mm
Cover Width 855mm
Thickness 3.0mm
Corrugation Width 95mm
Corrugation Height 38mm
Corrugations per sheet 10
Weight of material 3.3kg/m²
Weight per sheet 6.4kg

Onduline sheeting is especially useful in the repair and maintenance of older buildings. The sheets can be fixed directly on to the existing roof decking either as a temporary patching measure or as a permanent replacement. They are particularly suitable for the repair or renovation of felted and old slate roofs. The old roof can be left in place to act as a second insulating skin with the Onduline fixed on top of it. Alternatively the old roof covering can be removed and the whole building re-roofed.

The light weight and flexibility of Onduline sheets is a further advantage with old buildings. The sheets put few additional loading demands on ageing timbers and their easily sawn profiles make it possible to roof almost any shape.

With its range of environmentally sensitive colours, Onduline has found widespread acceptance as a roof and wall cladding material on farms and in related areas such as equestrian establishments, kennels, zoos and wildlife parks.

Its high insulation and sound absorbency values make it ideal for livestock housing and its resistance to rot and rust make it particularly suitable where high and even acid condensation can occur.

The sheets will flex to adjust to older, uneven roof timbers and being simple to cut and shape they can be easily fixed by the local labour force.

The unique, patented Onduline Undersheet System, marketed in the UK under the Ondutile brand name, uses Onduline sheets to provide a secondary weather-proof membrane under conventional tiled and slate roofs.

The primary purpose is to enable the pitch of the roof to be substantially reduced below that recommended by the tile manufacturer. At the same time Ondutile also adds to the thermal and sound insulation properties of the roof.

The examples shown here are typical of the many Ondutile applications across the country. They include lean-to extensions where the height of the roof has been restricted, new buildings where the overall height of the building has been restricted by local planning regulations and examples of where the architects design has called for a pitch below that recommended by the tile manufacturer.

Onduline Fixing (roof support structures) It is essential that the correct support be given to Onduline sheets. Use these tables to avoid problems. First establish the roof pitch. You can then check if a decking is required, or at what centres the purlins should be fixed. Finally note the sheet end and corrugation side lap.

Note: The section of the decking and purlins should be of sufficient size to support the weight of the roof and will be determined by the distance between rafters.

For Roof pitches from 5° - 10°  
Support Decking or close boarding
End Lap 300mm
Side Lap 2 corrugations
Gradient 1 in 11 to 1in 12

 

For Roof pitches from 10° - 15°  
Support Purlins at 450mm centres
End Lap 200mm
Side Lap 1 corrugation
Gradient 1 in 6 to 1 in 4

 

For Roof pitches from 15° and over  
Support Purlin at 610mm centres
End Lap 170mm
Side Lap 1 corrugation
Gradient 1 in 4 or less

You can also download further information by following the links below: