Onduline roofing sheets are another popular Bitumen roofing system. This solution is very much like the Coroline system but heavier duty. Onduline is ideal for outdoor roof surfaces such as sheds and garages.
The stronger profile makes these sheets suitable for agricultural use. This includes buildings such as stables, barns and farm houses.
Onduline Corrugated Bitumen Sheets
Onduline Corrugated Bitumen Sheets come with a 15 year waterproofing guarantee. They are strong but flexible with the ability to withstand winds of up to 120 mph. Their flexibility makes them easy to mould and shape to suit your roof surface.
This is one of the easier Bitumen roof systems to install which is also ideal for renovation projects. The sheets are quite lightweight which helps to reduce the stress on your structure. The length of the sheets are 2000 mm with a 950 mm length. These are easy to cut to size with a saw and lubricating oil. The 3 mm thickness makes them stronger to resist extreme weather.
You can buy Onduline roofing sheets in four colours which blend in with the environment. Green and red tend to be the most popular but you can also buy in black and brown. The staining process adds longevity to the colour retention properties of the sheets. It also helps to add a greater resistance to UV rays from the sun.
Benefits And Qualities
Below is a summary of some of the benefits and advantages of Onduline roofing sheets.
- Onduline Bitumen sheets are flexible which makes them easy to cut, shape and install
- The sheets hold up well to windy conditions of up to 120 Mph
- Friendly to the environment and available in four colours
- You can expect a 15 year waterproofing guarantee against water damage
- The stronger sheet profile makes them less likely to damage or become brittle
- The staining process means the sheets will retail their colour for longer
- Ideal for new builds or renovation projects
- Suitable for installation of sheds, garages and agricultural buildings
Basic Installation Tips
Online roofing sheets come with a handy guide which makes it easier for the installer. It’s key to establish the pitch of the roof first to determine the support and side laps. Pitches of 5-10 degrees will need decking in which to add the sheet fixings.
If the pitch is 10-15 degrees then you will need to fix the sheets to purlins at 45 cm centres. For steeper pitches it’s best to consult the technical handbook which accompanies the system.
You should add fixings to each end of the sheet at every corrugation. If your roof has purlins you will need a fixing for each plus every other corrugation in the middle of the sheets.
The sheet overhang should be no more than 7 cm at the eaves. The ridge will have around a 12 cm overlap on each side. You should add a fixing to each corrugation on both sides. To seal the corrugation you can use eaves fillers.