Onduline corrugated roofing

Onduline corrugated roofing

Onduline is one of the most popular bituminous corrugated roofing sheets. Onduline roofing sheets are easy to handle and simple to fix, requiring no specialist trade skills or equipment. Onduline corrugated roofing sheets is one of the most lightweight roofing material. It is manufactured from a mono-layer of organic fibres impregnated with bitumen under intense pressure and heat. The colour pigmentation system "stains" the colour into the sheet with a UV resistant resin. The roofing sheet is flexible and durable with excellent weathering and colour retention properties.

Onduline corrugated roofing sheet specification:
Onduline sheet size: 2 x 0.95m
Onduline sheet weight: 6.4kg   Onduline corrugation size: 95 x 38mm
Onduline sheet thickness: 3mm
Colours: Black, Green, Red, Brown.
Onduline corrugated roof sheet got guaranteed waterproof for the first 15 years. Onduline withstands windspeeds up to 120mph (192kph). Onduline roofing sheets are rot and fungiresistant .

The great question is the onduline corrugated roof sheet fire resistant? The company says about antipirens inside the onduline sheet. But In Grait Britain Onduline is not allowed for housing - it can be applied on house roofs only after fire resistant paint treatment. Look at the screenshot from tthe UK Onduline website:

onduline fire resistance

Here is our onduline corrugated roof sheets illustrated installation manual:

Onduline sheets Onduline trade mark
Original corrugated Onduline roof sheet is mono-layer of organic fibres impregnated with bitumen and color pigment. The original Onduline roof sheet got the Onduline trade mark imprint on each sheet.
Onduline nails Onduline nails
Onduline corrugated roof sheets comes with original nails and plastic nail washers with caps. Only use Onduline PP or Safetop nails on timber. Use a string line to keep fixings in line. Original Onduline roofing nails with plastic caps. Be sure to lock the cap well: it has intention to opened from tim to time.
Onduline sheet Onduline roofing construction
Onduline is resistant to the build up of condensation. However it is at risk of condensation formation during the winter months. Generally, air movement generated by the installation of high and low level ventilation will avoid this problem. The risk of condensation can be further reduced byusing an Ondutiss underlay membrane fixed below the purlins. It is essential that the correct support be applied to the Onduline sheets. Consult the illustrations below to set the correct fixing specification. 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 laps and set out the roof accordingly. Roof pitch 15o or more: Purlins fixed at maximum span of 610mm. (10-15o - 450mm).
Onduline installation Onduline nailing
Start fixing sheets at the opposite end of the roof from the prevailing winds. Cut a sheet in half vertically and use to lay sheet courses in a broken bond pattern. The maximum sheet overhang at the eaves is 7cm. Nail sheets every corrugation at the eaves and sheet overlaps and either side of vertical joints. Nail every other corrugation on intermediate purlins.
Onduline roofing Onduline and chimney
Fasten timber barge board level with the top of finished Onduline roof. The Onduline verge units are then overlaid and nailed into position. Alternatively, fix barge board level with the underside of the Onduline corrugation and overhang corrugation. Fold down and nail in position. Use Onduline pre-formed apron flashing to seal end wall abutments. Use separate cover flashing to the wall to allow for movement.
Onduline roof Onduline corrugated roofing
Fix valley boards/trimming purlins and line with either Onduline, metal, or GRP performed liner units. The vertical valley depth should be 7.5cm. Incorrect Onduline corrugated sheets installation: the seets were not cut in half vertically with a new row to lay sheet courses in a broken bond pattern.
Onduline aging Green onduline roof
Time and sun can couse color changes with Onduline roofing sheets. The green Onduline roofing sheets are the most color durable (and expensive).

Here is a original Onduline roof corrugated sheets installation manual (PDF)

 

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