Faq
- Can I install I install Onduline sheets upside down?
- Which way up is an Onduline sheet fixed?
- Can I install Onduline roof sheets flat?
- How long is BARDOLINE guaranteed for?
- Where can I find Onduline installation instructions?
- What is the minimum pitch for Onduvilla tiles?
- How many nails should I use per Onduvilla tile?
- What is the overhang required for ONDUVILLA tiles?
- Fixing the Hip Detail
- What tools are needed for installing Onduline sheets?
- How to Fix the Eaves Trays
- What’s the difference between Onduline roofing and metal roofing?
- Fixing an Eaves Ventilation Strip
- What is the weight of an Onduline sheet?
- Can you fix Onduline to a curved Roof?
- Are Onduline sheets resistant to mould and mildew?
- How can I cut an Onduline sheet?
- Can Onduline sheets replace corrugated metal roofing?
- How do I replace a shed roof with Onduline sheets?
- Can I install Onduline sheets on top of the existing shed felt?
- Can I install Onduline roofing sheets directly onto timber boards?
- What should my roof pitch be to install Onduline?
- Can condensation form beneath an Onduline roof?
- How many fixings do I need per Onduline sheet?
- Is watertighness and waterproofing also warrantied for low pitched roofs?
- Do Onduline roofing sheets need ventilation?
- Can I install ONDULINE CLASSIC as a fence?
- Do I need a breathable membrane under Onduline roofing?
- How do you cut an Onduvilla tile?
- Measuring your roof pitch
- Do Onduline roofing sheets sag in hot weather?
- Identifying problems with your roof structure
- Are Onduline roofing sheets better than felt roofing for a shed?
- What is the condition of my roof structure?
- How do you fix the Onduline ridges?
- What structure is my roof?
- How to fix Onduline Verges and Edges
- Measuring purlin or timber batten spacing / distance
- Fixing Eaves
- Where to fix Onduline accessories
Which way up is an Onduline sheet fixed?
Onduline roofing sheets are easily identifiable by the printed production quality control information applied up the last corrugation on the smooth grained topside.
The topside of the roof sheet is sprayed with a resin which helps to combat UV degradation. The colouring is a natural pigment, which is impregnated into the sheet, prior to the bitumen dip. This process ensures an equal colouring and means the colour cannot peel from the sheet.
The underside of the roof sheet has a rippled finish. This increases the surface area, enabling it to combat condensation. It will hold the moisture for as long as it can, until the airflow dissipates the liquid, by turning it back into vapour.
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