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About to start a roofing project, but not sure what type of roofing is right for your project? Then read our guide to find the answer.

What roofing felt do I need?

There are four different types of felt roofing:

  • Shed felt
  • Traditional felt
  • Torch-On roofing felt
  • Easy seal felt

Each type has its advantages and disadvantages, most notably is the fact that some types of felt are useable on habitable environments and others are not! This is a very important point, because if you buy the wrong type you could be putting your home and yourself at risk.

Types of roofing felt

Roofing felts are split into two categories, habitable and non-habitable.

Shed felt

Shed Felt is the ideal product for waterproofing a variety of garden buildings, including sheds, summerhouses, kennels and hutches.

Features and benefits

  • Traditional style roofing felt
  • Waterproofs and protects from the elements
  • Quick and easy to install
  • For use on non-habitable buildings.

Traditional felt

This two-layer system (based on using underlay and top sheet) is ideally suited as a weatherproofing material for the roofs of garages and larger non-habitable outbuildings with a 5 degree pitch or more.

Features and benefits

  • Weatherproofs and protects
  • Suitable for non-habitable buildings and garages
  • Lasts up to 10 years when used with Wickes Traditional Roofing Felt Underlay.

Why trade up from shed felt to traditional felt?

Traditional Felt offers: Long lasting weatherproofing, suitable for non-habitable buildings and garages.

Long-term 2 layer system for weatherproofing and protection- vs Shed Felt shorter term- single layer system so lasts twice as long.

Torch-On roofing felt

The Torch-On System incorporates an underlay and a Capsheet, and offers high performance waterproofing for habitable buildings.

Features and benefits

  • APP modified bitumen for added flexibility
  • Cost effective durable performance
  • 10 year guarantee
  • Low temperature flexibility -5°C.
  • Suitable for habitable buildings

Easy seal felt

Easy Seal is a 2 layer self adhesive system that is safe to apply and lasts up to 20 years

Features and benefits

  • Simple self-adhesive application
  • Cold applied – no gas torches or hot bitumen required
  • High strength polyester base
  • High flexibility elastomeric bitumen coating
  • Suitable for use on habitable buildings
  • BBA Certified No. 02/3916
  • Lasts up to 20 years.

Why trade up from Torch-On to Easy Seal?

  • Easy Seal offers: A long lasting roofing felt system, suitable for habitable buildings, garages and extensions.
  • Lasts up to 20 years when using the 2 layer Easy Seal System vs 10 years for Torch-On
  • A cold applied, self-adhesive, roofing felt system - vs the Torch-On heat applied Roofing Felt system that would usually require a tradesman to install
  • BBA Certified

I’m confused by the different roofing felt products and how they should be used.

Shed felt installation

Where used as a single layer on a shed roof, the minimum pitch of the roof should be 20 degrees. Shed Felt should be clout nail fixed with the laps fully sealed using a suitable cold adhesive such as Trowelable Roofing Felt Adhesive.

Traditional felt installation

Quick drying roof primer should be used to prepare the roof surface. Roofing Felt Adhesive can then be used to bond both the Underlay and Capsheet.

Torch-On roofing installation

Quick Drying Roof Primer should be used to prepare the roof surface. Torch-On membranes must not be directly torched onto combustible substrates. For these projects the use of a Traditional Felt Underlay is recommended which can also be nailed down using clout nails. Alternatively you can use a self-adhesive layer such as Easy Seal Underlay.

Easy seal installation

Easy Seal Primer should be used to prepare the roof surface. Then use the easy seals self adhesive to stick it down. Then Lap Mastic is used to seal end laps and gutter/drip edges.

How to felt a shed roof

Felt accessories and tools

Below we will go through some of the accessories needed when fitting felt, as well as what tools may be needed.

Quick drying roofing felt primer

This is deep penetrating bituminous solution for stabilising dusty and porous surfaces prior to the application of roofing felt systems. When used in conjunction with Roofing Felt Adhesive, the bond between the roof and the waterproofing material being applied is significantly improved, ensuring a long term, watertight finish. This product can be used with Traditional and Shed Felts.

Features and benefits

  • Prepares and seals surfaces
  • Dries in 3 hours.

Lap mastic

A general purpose bitumen adhesive to seal overlaps on roofing felt and shingles for traditional and shed felts.

Features and benefits

  • Flexible bitumen adhesive
  • Seals overlaps on roofing felt and shingles

Trowel applied roofing felt adhesive

A thick, fast drying, cold-applied bitumen adhesive which enables total bonding of roofing felts without the need for hot bitumen or flames. Specially formulated for immediate and workable felt application, it is also ideal for sealing lap joints and for fixing chippings to the final layer of a built-up roofing system.

Features and benefits

  • Rapid bond for immediate and workable felt application
  • Cold applied
  • Can be used on both flat and pitched roofs.

Brush applied roofing felt adhesive

A brush applied, solvent-based felt adhesive that is suitable for bonding all types of roofing felt.

Features and benefits

  • This product bonds all types of roofing felts
  • Can be applied to asphalt, metal and concrete substrates
  • Product has a fast drying process.

Galvanised clout nail

The galvanised clout nails are great for nailing felt down. If you are fitting felt to a shed, the recommended length would be 20mm.

Features and benefits

  • For securing roofing felt
  • Galvanised rust resistant finish.

What are the different types of roofing sheeting available and how do I use it?

Sheet roofing

There are 3 different types of roofing sheets:

  • PVCu Corrugated Roofing sheets
  • Corrugated Bitumen Sheets
  • Polycarbonate sheets

Each type of sheet roofing can be used on a different structure or project, so it is a good idea to know which is best for what job

Where to use the different types of roofing sheets

These roofing sheets can be used on a variety of projects, but it is best to get the correct sheet for the correct project. Let's have a look at where they can be applied.

PVCu corrugated roofing sheets

The sheets can be laid onto a roof structure of rafters and purlins or onto sheet decking. If the roof structure is not perfectly even, this will not create problems since the sheets are, to an extent, flexible and will withstand some bending to accommodate slight variations in levels. They can also be used as a vertical wall cladding, ideally suited for sheds and other out buildings.

PVCu Corrugated Roofing Sheet is very light in weight, simple to use and has high impact strength. There are two corrugation profiles – Standard and Mini, both of these have a high light transmission and are resistant to yellowing. The standard corrugated roofing sheets are compatible with corrugates of alternative materials such as bitumen and steel, however the mini corrugated roof sheets are often ideal for smaller buildings as it’s often considered more aesthetically pleasing.

Features and benefits

  • Lightweight and easy to handle
  • Quickly fixed with special PVC headed nails
  • Ideal for new, existing or temporary roof coverings
  • Chemical and corrosion resistant
  • Rust, rot, and frost resistant
  • Cuts easily with a fine toothed saw
  • Asbestos free

Uses for PVCu sheets:

  • Lean-to extensions
  • Carports
  • Covered walkways
  • Gazebos and garden canopies
  • Garden shed rooflights

Cutting clear corrugated roofing sheet

Lay the sheet on a flat surface and mark out the line of the cut, provide good support on either side and cut using either an oiled fine-toothed saw, or preferable a circular power saw.

PVCu sheet flashing

  • Provides a quick way of flashing corrugated sheet to the wall
  • The profile matches the 3' sheet avoiding the need to mould flashband over corrugations
  • Provides a barrier against water getting into building down the wall.

Corrugated bitumen sheets

Corrugated bitumen sheets are suitable for non habitable buildings, however they are unsuitable for habitable buildings.

They can be used on:

  • Domestic / Garden buildings such as sheds, carports and garages
  • Agricultural and equestrian buildings such as barns, stables and cowsheds
  • Commercial and light industrial buildings

Features and benefits

  • Easy to handle, cut and fix
  • 15 year weatherproofing guarantee
  • Excellent colour retention properties
  • Withstands wind speeds of up to 120mph (192kph)
  • Sound insulation
  • Does not rust, or contain asbestos
  • ISO 9001:2008 Quality Management Standard
  • ISO 14001: 2004 Environmental Management
  • Our Bitumen sheets are bitumen throughout not just coated
  • Available in both black and green

Uses for bitumen sheets:

  • Outbuildings
  • Garages and garden sheds
  • Covered storage areas
  • Stables
  • Installation method varies dependant on roof pitch to the Bitumen sheets.

Cutting bitumen roofing sheet

First mark out the line of the cut in the base of the sheet corrugation, then use a roofers knife to score the corrugated bitumen sheet. Next fold back the sheet along the cut / scored line to separate the cut sections of the sheet.

Bitumen sheet pitch - fitting it correctly

It is massively important that you fit a bitumen sheet correctly, if you don’t and the roof starts collecting water it will sag and sink in the middle. This will allow water to pour through which can be disastrous.

Below you will see the guide for the nailing pattern on a bitumen roof.


Below you will see the guide for working out the pitch and then best way to fit the bitumen roof according to the pitch.


Polycarbonate sheets

Although used chiefly as a conservatory roofing sheet along with special fixing profiles and glazing bars, the sheeting is also suitable for a variety of other applications such as glazing and insulating greenhouses, for glazing porches, for carport roofs, and for roofing sheds or workshops to allow daylight in. It also has uses as a mini greenhouse.

As one of the toughest plastics known to man, polycarbonate is rapidly proving itself to be an excellent material for roofing purposes. In its twinwall and triplewall sheet form, it is the perfect replacement for wired glass, or corrugated sheeting.

Features and Benefits

  • Insulates like sealed unit double glazing
  • Material 200 times stronger than glass
  • Approximately 5 times lighter than glass
  • Shatterproof
  • Flexible
  • Transmits up to 90% of available light
  • Built-in protection against harmful UV rays
  • Class 1 Spread of Flame rating to BS 476 Part 7 1971
  • Maintenance free

Uses for Polycarbonate Sheets:

  • Conservatory and summer houses
  • Lean-to and extensions
  • Swimming pool covers
  • Garden shed roof lights

Cutting polycarbonate roofing sheet

Polycarbonate, despite its strength, can be cut using a fine toothed panel saw. When cutting to width you should endeavour to cut close to the outside of one of the internal walls as in Diagram D.

What fixings do you need for each material?

For each of the sheet roofing, there is a specific way to fix it to your roof, below we will go through each sheet and what fixings they require.

PVCu corrugated roofing sheet fixings

PVCu corrugated fixings are to be installed on the ridge of the corrugation not in the trough to prevent leaking. For fixing the PVCu Corrugated Sheets only. Mini profile fixings should be installed on the ridge of the corrugation and not in the trough to prevent leaks. They’re for fixing mini profile corrugated sheets only and have a translucent integrated cap for a smooth finish.

Other products to be used in this project are Eaves Fillers which can be used to seal your roof, and keep out draughts and insects.

Corrugated bitumen sheets fixings

Using the Profile sheeting nails to fix the bitumen sheets, simply nail through the washer and top of the sheet corrugation and clip the washer into place.

  • You can replace the standard nail supplied with a proprietary screw for a more secure fixing
  • Use the cap and washer
  • Available in black or green
  • Ideal for fixing the sheets to thin decked roofs

Polycarbonate sheeting fixings

They securely fix polycarbonate sheets to a wooden sub-structure.

  • Translucent Fixing Button for use with polycarbonate sheeting
  • Button increases support to polycarbonate sheet
  • Translucent integrated cap gives a smooth finish
  • Translucent coloured button matches glazing accessories

Other products to be used in this project include Glazing Bars to help fix the roofing sheets, End Caps to provide a neat gable end to your project, Edge Flashing to provide a neat finish to the sides of the polycabonate roofing, and Anti Dust Tape to seal cut ends.

Different types of liquid roofing

There are 2 different types of liquid roofing which are repair and protection.

Each has their own features and benefits which we will explore now

Repair - emergency repair for short term fixes

The 3 products below are temporary solutions and they can be applied in damp conditions, are ideal for pooling and can be applied in one coat.

Acrypol+ system

Acrypol + Waterproof Coating is a tough, seamless, flexible layer for repairing light damage to roofs.


  • An instant repair paint designed for providing roofs with an immediate waterproof coating
  • A semi liquid paste that dries to form an ultra tough, seamless, flexible layer for repairing light damage to roofs.


  • Can be used in commercial, industrial and domestic flat roofs
  • Acrypol + Waterproof Coating also offers outstanding solar reflective qualities and excellent flexibility.

Bostik flexacryl

Available in black and grey 1kg tins but also 5kg in Grey.

  • Immediate waterproofer
  • Can be applied on wet and dry surfaces
  • No primer required

Thompson's emergency roof repair

For emergency roof leaks that require immediate repair

  • Apply in a downpour or even under water
  • Added fibres fill and bridge repairs
  • Flexes with the natural movement of the roof

What are the other types of repair liquids?

All weather roof repair cartridge

Its special formulation allows the product to be applied in wet weather, providing an instant leak solution. The product is extremely tough and durable.

Features and benefits

  • Instant leak repair for roofs, gutters and brickwork.
  • All weather application
  • Acrylic Roof Repair Cartridge is used with a cartridge gun for accurate application

All weather roof repair mastic

All Weather Roof Repair Mastic has been specially formulated to stop leaks in roofs and gutters in emergency situations, even under the most severe weather conditions.

Features and benefits

  • Emergency repair for roofs and gutters
  • All weather application
  • Ready to use from the tin
  • Protects roof to allow for longer planned maintenance.
  • All Weather Roof Repair Mastic can be simply applied using a trowel or knife

Quick seal spray

Quick Seal is a spray-applied mastic, formulated to provide rapid sealing of water leaks on most surfaces, even when damp.

Features and benefits

  • Instant leak repair for roof and gutters
  • Anti-sag formulation
  • Adheres to damp surfaces.

Different types of liquid protection.

10 year roof seal

For newly laid roofing felt in need of protection, damaged roofing in need of repair and protection and weathered flat roofs. Plus it gives 10 years of weatherproofing protection.

Thompson’s one coat roof seal

Thompson’s one coat roof seal gives newly laid roofing felt protection. It can also be used on damaged roofing needing repair and protection as well as on weathered flat roofs. This product gives 10 years of weatherproofing protection and will protect and weatherproof flat roofs in one coat.

Features and benefits

  • Flexes with the natural movement of the roof
  • Outperforms traditional bitumen coatings


These come in two versions with a solvent free option and are brush applied

Wickes all weather waterproofer

A high-performance, instant roof repair compound, ideal for emergency repairs or general maintenance.

Wickes brush applied waterproofer

A solvent-free waterproofer suitable for most roofing surfaces and provides a protective coating for wood, metal and cement.

Tools needed for the job

Below we are going to cover some of the necessary tools for the job, and what tools are needed for which specific liquid roofing technique.

Solvent liquid tools

When it comes to solvent liquids the main tools needed are brushes and rollers, but because of the different ranges of solvent liquids there are some other tools that could help you out.

It is a good idea to get multiple tools, especially of the brushes, soft brooms and rollers, because they will need cleaning with white spirit. If you initially get 2 of each tool you shouldn’t have to pop out mid job to get more. Please check that the rollers and brushes are suitable to use with solvent based products.

Repair liquid tools

Repair liquids come in a variety of applications, there is a spray tin which will not require any tools, and a cartridge which will only require a cartridge gun. However the mastic will require you to have a trowel or knife to apply it.