Shelter in Style: The Comprehensive Guide to Bitumen Roof Sheets

What are Bitumen Roof Sheets? 

Bitumen roof sheets, often referred to as corrugated bitumen sheets, are a roofing material that combines durability, water resistance, and ease of use. They are typically made by infusing natural or synthetic fibres with bitumen, a viscous black mixture of hydrocarbons derived from petroleum. Here's a deeper look into what bitumen roof sheets are: 

omposition: Bitumen roof sheets are composed of cellulose fibres or sometimes synthetic materials which are then saturated in bitumen. This process results in sheets that are both sturdy and flexible. 

Appearance: These sheets often have a wavy, corrugated design, which gives them added strength and allows them to shed water efficiently. 

Flexibility: One of the standout features of bitumen roof sheets is their flexibility. This makes them adaptable to various roof shapes and less prone to cracking or breaking. 

UV Protection: Many bitumen roof sheets come with additional treatments that make them resistant to the harmful effects of UV rays. 

Colours and Styles: Modern bitumen roof sheets are available in various colours, allowing homeowners and builders to choose sheets that match the aesthetic of the building. 

Uses: Bitumen roof sheets are commonly used on sheds, garages, log stores, and other outdoor structures. Due to their cost-effectiveness and durability, they're also found on residential and commercial buildings. 

Why Choose Bitumen Roof Sheets? 

Choosing the right roofing material is crucial as it plays a significant role in protecting the structure, determining maintenance requirements, and influencing the overall aesthetics. Bitumen roof sheets stand out as a versatile choice: 

Bitumen roof sheets hold a significant place in the world of roofing, particularly because of their unique properties and advantages they offer. Let's delve into why these sheets are so important: 

Affordability: One of the foremost reasons for their popularity is cost-effectiveness. Bitumen roof sheets offer a robust roofing solution without breaking the bank. This makes them especially attractive for projects with budget constraints. 

Durability: Bitumen is inherently water-resistant. When used for roofing, it provides excellent protection against rain and moisture. Furthermore, these sheets can withstand extreme weather conditions, from heavy rainfall to strong UV radiation, making them a long-lasting choice. 

Ease of Installation: Their flexibility and lightweight nature make bitumen roof sheets relatively easy to install. This can lead to reduced labour costs and shorter installation times. 

Low Maintenance: Once installed, bitumen roof sheets require minimal upkeep. Their ability to resist rot, decay, and algae growth reduces the need for regular treatments or replacements. 

Versatility in Design: Modern manufacturing techniques mean bitumen roof sheets are available in a variety of colours and finishes. This allows homeowners and developers to match the aesthetics of their building or structure seamlessly. 

Sound Insulation: The dense composition of bitumen roof sheets provides an added benefit of sound insulation, reducing noise pollution from rain, hail, or external environmental factors. 

Eco-friendly: Some bitumen roof sheets are manufactured using recycled materials, which can make them a more environmentally friendly option. At the end of their lifespan, they can also often be recycled, reducing the environmental footprint of a building project. 

Safety: Bitumen roof sheets are typically fire-resistant, adding an extra layer of safety to structures. 

Adaptability: Their flexible nature means they can be tailored to fit a wide variety of roof shapes and sizes, from the arches of barns to the slopes of sheds. 

How to Maintain Your Bitumen Roof Sheets? 

Bitumen roof sheets, while known for their durability and longevity, can greatly benefit from periodic maintenance to extend their lifespan and keep them looking and functioning at their best. Here’s a guide on how to maintain bitumen roof sheets: 

Regular Inspection: Schedule semi-annual inspections (typically before and after winter) to assess the general condition of your roof. Look out for signs of wear and tear, such as cracks, holes, or any form of deformation. 

Clean the Surface: Remove debris like leaves, twigs, and dirt that can accumulate on the roof, as these can retain moisture and potentially damage the sheets. Use a soft brush or broom to gently sweep off the debris. For a deeper clean, you can use a mild detergent mixed with water and a soft brush to scrub away any moss, algae, or stubborn dirt. Rinse with clean water afterwards. 

Gutter and Downpipe Cleaning: Ensure gutters and downpipes are clear of obstructions. This will prevent water from pooling on the roof, which can accelerate the wear of bitumen sheets. Clean gutters at least twice a year, preferably during spring and autumn. 

Check for Loose Fixings: Over time, the fixings can become loose due to temperature changes and natural expansion and contraction. Tighten any loose screws or nails to ensure the sheets remain securely in place. 

Repair Minor Damages: Small cracks or holes can be patched using a bitumen-based sealant or patching compound. It's crucial to address minor damages promptly to prevent them from escalating into more significant issues. 

Avoid Heavy Loads: Never place heavy objects on your bitumen roof sheets. 

If you need to walk on the roof, tread lightly and wear soft-soled shoes to distribute your weight evenly and prevent damage. 

UV Protection: If your bitumen sheets aren't already UV protected, consider applying a UV-resistant coating. This will help prevent the sheets from becoming brittle and cracking due to prolonged exposure to sunlight. 

Ventilation: Ensure that your roof space is adequately ventilated. Proper ventilation prevents excessive heat buildup in summer and condensation in winter, both of which can adversely affect the lifespan of bitumen sheets. 

Professional Inspection: While DIY maintenance is crucial, consider getting a professional roofer to inspect your bitumen roof every few years. A professional roofer can spot potential issues that an untrained eye might miss. 

Replacement: If a sheet becomes extensively damaged, it's better to replace it entirely rather than attempting numerous patch-up jobs. By following these maintenance steps, you can extend the lifespan of your bitumen roof sheets, ensuring they remain a reliable and durable roofing solution for many years. 

How to Install Bitumen Roof Sheets? 

Installing bitumen roof sheets is a process that's manageable for those familiar with basic roofing principles. Still, if you've never tackled a roofing project, it's always wise to seek guidance or even hire a professional. Below is a general step-by-step guide on how to install bitumen roof sheets: 

Materials and Tools: 

Bitumen roof sheets 

Roofing nails or screws with waterproof washers 

Bitumen sealant or mastic if required

A hand saw or fine-toothed circular saw 

Tape measure 

Chalk line or pencil 

Safety gear (gloves, safety glasses, non-slip shoes) 

Installation Process: 


Measure your roof to determine the number of sheets you'll need. 

Ensure your roof frame or structure is level and in good condition. 

Laying the First Sheet: Start at the furthest edge of the roof. 

Lay the first bitumen sheet so it overhangs the edge slightly (usually about 2 inches or 5 cm). This ensures that water will run off the sheet and not into the structure below. 



Use the roofing nails or screws to attach the sheet to the roof frame.

Screws or nails should be placed at the peak of the corrugations to prevent water ingress. Make sure they're spaced at intervals specified by the manufacturer, usually about 30 cm apart.

Laying Subsequent Sheets:

The next sheet should overlap the first sheet by one corrugation to ensure there are no gaps for water to seep through.

Continue fastening in the same manner as the first sheet.

Repeat this process until the entire row is covered.

Cutting Sheets:

If you reach the end of a row and a full sheet isn't needed, you'll have to cut a sheet to size.

Mark the desired size using a chalk line or pencil.

Cut using a hand saw or a fine-toothed circular saw. Ensure your cuts are straight and neat.

Starting the Next Row:

If your roof has a pitch or angle to it, start the next row with a half-sheet so that the sheet corrugations are staggered. This provides better coverage and water run-off.

Remember to overlap both at the sides (by one corrugation) and at the top (by about 15 cm or 6 inches) to ensure maximum water tightness.

Ridge and Flashing:

Once you’ve laid all the sheets, you'll need to cover the ridge (top) of the roof.

Use a bitumen ridge tile or ridge capping. This not only gives a finished look but also ensures water doesn't penetrate the peak of the roof.

If your roof meets a wall or chimney, use flashing to seal the gap and prevent water ingress.


Once all sheets are laid and fastened, use a bitumen sealant or mastic to seal any small gaps or holes. This ensures a watertight seal.

Safety First:

Always wear protective gear.

Work with a partner if possible. They can help stabilise ladders, hand up materials, and ensure overall safety.

Be always mindful of the roof’s edge.

And there you have it – a general guide on how to install bitumen roof sheets. However, always refer to the manufacturer's instructions for the specific product you're using, as there can be variations.

Top Safety Tips for Bitumen Roof Sheet Installation:

Safety should always be paramount when working on roofing projects. Here are the top safety tips to consider when installing bitumen roof sheets:

Proper Safety Gear:

Always wear a hard hat to protect against falling objects.

Use safety goggles to protect eyes from dust, debris, or splinters while cutting sheets.

Wear gloves to avoid cuts or grazes from handling the sheets.

Non-slip shoes or boots with good tread are essential to prevent slipping.

Ladder Safety:

Always use a sturdy, stable ladder that extends a few feet above the edge of the roof.

Ensure the ladder is positioned on a firm, level base.

Use a ladder stabiliser or have someone hold the ladder when you’re climbing.

Avoid Working in Adverse Weather:

Never work on the roof during rain, strong winds, or lightning. Wet roofs can be incredibly slippery, and winds can cause loss of balance.

Stay Aware of the Roof Edge:

It’s easy to become focused on the task and lose awareness of your surroundings. Always be conscious of how close you are to the edge to avoid falls.

Work with a Buddy:

It’s safer to have someone with you not only for assistance but also in case of emergencies.

Secure Your Tools:

Use a tool belt or pouch to keep tools close. This prevents tools from falling off the roof, which could cause injury to others below.

Avoid Overreaching:

Move your ladder or reposition yourself rather than stretching too far, which could lead to a loss of balance.

Clear the Work Area:

Remove any trip hazards from the roof and keep your workspace tidy. This includes regularly removing offcuts and debris.

Stay Hydrated:

Roofing can be strenuous, and if you’re working in the sun, it can get hot fast. Drink plenty of water to avoid dehydration.

Know Your Limits:

If you're feeling unsure or uneasy about any part of the installation, there's no shame in calling a professional. It’s always better to be safe.

Roof’s Structural Integrity:

Before starting, ensure that the roof structure can support your weight. Check for any signs of rot, damage, or instability.

Be Mindful of Power Lines:

If there are any power lines near the roof or work area, be very cautious. Maintain a safe distance and use non-conductive ladders and tools.

Fire Safety:

If you’re using any tools or materials that can generate sparks or heat, have a fire extinguisher on hand. This is especially crucial when working with materials like bitumen.

Always Read Manufacturer’s Guidelines:

Specific products might have particular installation methods or precautions. Always read and follow these guidelines.

By following these safety tips and remaining vigilant, you can reduce the risk of accidents and ensure a safer bitumen roof sheet installation.

Choose your Bitumen Roof Sheets with Roofing Supplies UK

Ready to upgrade to durable and stylish roofing? Explore our extensive range of Bitumen Roof Sheets at Roofing Supplies UK. Contact us today to find the perfect solution for your needs! Email us at, call us at 01752 466151, or order online 24 hours a day, seven days a week. We’ll be able to help you purchase your roof coverings now.