Greater London felt roof replacement Contractors

Professional Felt Roof Replacement Throughout Greater London

Felt roof replacement is one of the most common flat roofing projects carried out across Greater London. Felt roofing is widely used on garages, home extensions, workshops, garden rooms and other buildings across the county. Over time, repeated exposure to rain, frost, sunlight and temperature changes can cause the felt to deteriorate.

Our service connects property owners with local felt roofing specialists covering towns and villages across Greater London. Depending on local availability, up to four local roofers may contact you about the work. There is no fee for homeowners and no pressure to appoint a contractor.

When Is Felt Roof Replacement Necessary?

Localised damage may be suitable for a patch repair when the surrounding felt remains sound. However, full replacement may be the more economical option when repairs are becoming frequent.

Homeowners across Greater London commonly request replacement after repeated leaks, failed repairs or visible deterioration. A professional inspection can help establish whether another repair is worthwhile or a new system is needed.

Signs that a felt roof may need replacing include:

• Felt that has become brittle and cracked
• Repeated leaks in different parts of the roof
• Widespread blistering or bubbling
• Seams that have separated or lost their seal
• Felt shrinking away from edges and upstands
• Severe loss of the protective mineral surface
• Drainage problems that cannot be corrected with a minor repair
• Soft, rotten or sagging roof decking
• A heavy build-up of previous roofing layers
• An older system where further patching is unlikely to last

Felt Roof Replacement Services in Greater London

Our network includes roofers who replace felt roofing on many different types of property, including:

Single and Double Garage Roofing

• Single garage roof replacement
• Re-felting larger double garages
• Re-felting shared or managed garage blocks
• Replacement of leaking garage roofs
• Renewal of damaged garage decking
• Installing firring strips to improve garage roof drainage
• Replacing fascia boards and perimeter timbers

Re-Felting Home Extensions

• Replacing leaking kitchen extension roofs
• Rear and side extension roofing
• Replacement roofing above utility rooms and bathrooms
• Re-felting roofs over newly converted living spaces
• Warm roof upgrades over heated rooms
• Re-felting roofs containing rooflights

Re-Felting Porches and Bay Windows

• Porch roof replacement
• Re-felting flat and low-pitched bay roofs
• Re-felting small roof structures above doors
• Lead flashing and upstand replacement

Re-Felting Dormer Roofs

• Renewing the flat roof covering above a dormer
• Loft conversion flat roof replacement
• Renewal of felt upstands around dormers
• Replacing wet or inadequate dormer insulation

Shed, Workshop and Garden Building Roofs

• Re-felting timber sheds
• Replacing flat roofing above workspaces and hobby rooms
• Garden office and garden room roofing
• Re-felting summerhouses
• Replacement felt roofing for storage areas
• Stable and animal shelter roofing

Business and Landlord Roofing

• Replacement roofing for commercial retail premises
• Office and workplace roofing
• Commercial re-felting for industrial units
• Replacement felt roofing for public-use buildings
• Apartment block and communal flat roofs
• Re-felting commercial hospitality premises
• Replacement programmes for property portfolios

What a Full Felt Roof Replacement Includes

A proper re-felting project should address the covering, the roof deck and all vulnerable details. The exact method will depend on the contractor's assessment and the roofing system selected.

Initial Roof Inspection

A roofer will normally assess the felt, decking, edges and outlets before confirming a price. The survey may consider:

• Whether the current felt is suitable for repair or replacement
• The number of existing roofing layers
• Whether timber boards appear soft or uneven
• Low areas, blocked outlets and poor roof falls
• The condition of flashings and upstands
• Whether scaffolding or a tower may be needed
• The condition and suitability of existing insulation

Removing the Existing Roof Covering

Existing roofing layers are usually stripped back so the structure underneath can be checked. This allows the contractor to check whether the roof boards and perimeter timbers remain sound.

The work may include:

• Removing one or more layers of old felt
• Taking off failed perimeter details
• Cleaning and drying the exposed substrate
• Protecting the building during the work
• Removing stripped felt from the site

Preparing a Sound Roofing Substrate

New felt should not be installed over rotten or unstable decking. Contractors may need to:

• Renew soft and water-damaged roof decking
• Replace or reinforce structurally damaged roof members
• Fit new firring strips
• Renew perimeter timbers
• Prepare a smooth surface for the new felt
• Treat accessible timber where appropriate

Improving Flat Roof Insulation

A domestic flat roof replacement may need to include additional insulation. Depending on the building and applicable requirements, the work may include:

• Installing rigid insulation above the roof deck
• Removing insulation damaged by leaks
• Improving condensation control within the roof build-up
• Raising kerbs, outlets and edge details
• Addressing ventilation requirements within the roof void

Applying a New Multi-Layer Felt Roof

Professional felt roofs commonly use a two-layer or three-layer system. Depending on the chosen specification, this can include:

• Priming the roof deck where required
• A mechanically fixed, bonded or self-adhered first layer
• A reinforced roofing underlay
• A protective top layer with a mineral surface
• Bonding compatible felt layers using controlled heat
• Cold-applied or self-adhesive installation where required

Finishing Vulnerable Roofing Details

The new felt system must be carefully finished at every junction. The contractor may complete:

• Felt upstands against walls
• New flashing above felt upstands
• Finished roof edges above gutters and fascias
• Parapet and coping details
• Waterproofing around skylights
• Weatherproofing around flues, ducts and ventilation pipes
• Door thresholds and balcony junctions

Checking the Roof Drainage

Good drainage helps prevent unnecessary standing water. The contractor may:

• Clear existing roof outlets
• Install new flat roof drainage components
• Fit new guttering around garages or extensions
• Improve the direction of water flow
• Provide emergency overflow routes

Roof Handover and Guarantee

Once the new system has been installed, the contractor should inspect the completed details. The contractor may also:

• Remove stripped felt and site debris
• Inspect completed drainage details
• Provide photographs of the finished roof
• Provide warranty information
• Provide guidance on keeping outlets clear and spotting future damage

Felt Roofing Systems Available in Greater London

High-Performance Torch-On Felt

Torch-applied bitumen felt remains a common choice for durable flat roofing. The layers are carefully heated so that they bond together.

Professional systems commonly contain two or three compatible layers. Torch-on work should be carried out using appropriate equipment and safe working procedures.

Cold-Applied Felt Roofing

Flame-free felt roofing can be installed without using a gas torch. These systems may be suitable for areas close to combustible materials or occupied premises.

Self-Adhesive Felt Roofing

Some roofing systems use self-bonding layers rather than torch application. Proper surface preparation remains important, and installation should follow the manufacturer's specification.

Mineral-Surfaced Felt

A mineral-surfaced cap sheet is commonly used as the exposed weathering layer. This surface helps provide a durable finish for the completed roof.

Alternative Flat Roofing Options

Property owners may wish to compare felt with other roof coverings. Alternatives may include:

• Rubber flat roofing systems
• GRP fibreglass roofing
• Seamless liquid roofing membranes
• Specialist sheet membrane systems
• Mastic asphalt roofing

Each material has different installation requirements, costs and maintenance needs.

Typical Greater London Felt Roofing Prices

The price of felt roof replacement in Greater London depends on the roof area, access and required specification. The final quotation may be affected by the number of old layers, timber damage and roof details.

Actual costs can fall outside these ranges depending on the property and specification. For accurate local pricing, submit a free enquiry and compare quotations from roofers serving Greater London.

Factors That Influence Re-Felting Costs

• Roof area: Material and labour costs normally rise with the size of the roof.
• Roof shape: Corners, changes in level and complex details take longer to waterproof.
• Existing roof layers: A heavily overlaid roof may take longer to strip.
• Decking condition: The quotation may change if defective decking is discovered after stripping.
• Structural timber: Joist repairs or reinforcement add labour and materials.
• Insulation: Replacing wet insulation increases material costs.
• Felt specification: Higher-performance membranes generally involve a larger material cost.
• Access: Difficult or restricted access may require extra labour.
• Scaffolding: Safe access equipment can add to the overall price.
• Rooflights and penetrations: Extra detailing is needed around openings and services.
• Flashing and edges: New leadwork, trims and perimeter timbers can increase the quote.
• Drainage: Standing water problems can require changes to the deck.
• Waste removal: Disposal costs depend on the quantity of old materials.
• Location: Labour and operating costs can vary between different parts of Greater London.
• VAT: Quotes should state clearly whether VAT is additional.

Should the Roof Be Patched or Replaced?

The correct choice depends on the age of the felt, the extent of the damage and the condition of the deck. A repair may be suitable when:

• Only one joint, edge or section has failed
• The remaining covering still has a reasonable service life
• The roof decking is dry and structurally sound
• Previous patching has been limited

A full replacement may be more suitable when:

• There are widespread signs of ageing
• The roof leaks from more than one location
• The felt no longer remains flexible
• A large part of the substrate needs replacing
• The roof has poor falls or drainage throughout
• Wet insulation must be removed
• Replacement offers a more reliable long-term solution

How Long Does a Replacement Felt Roof Last?

The lifespan of a new felt roof depends on the materials, installation and roof design. A good-quality system may last significantly longer than older single-layer coverings.

The serviceable life can be influenced by:

• The quality and number of felt layers
• How carefully seams and edges are completed
• How quickly rainwater leaves the roof
• Exposure to sunlight, frost and strong winds
• Whether the surface is regularly walked on
• Whether debris is allowed to collect
• Prompt repair of minor defects

Workmanship Warranties and Material Guarantees

Guarantee terms can vary between quotations. Before appointing a contractor, ask:

• How long the workmanship guarantee lasts
• Which parts of the roof are included
• Which organisation is responsible for future claims
• Whether the guarantee is insurance-backed
• Which maintenance conditions must be followed
• Whether the warranty remains valid after a change of ownership

Preparing for Felt Roof Replacement

Homeowners may need to make practical arrangements before the contractor arrives. This may include:

• Providing space for vans, materials and waste removal
• Clearing belongings from garages or outbuildings
• Confirming which facilities the contractor may use
• Obtaining permission where neighbouring land must be used
• Keeping children and pets away from the work area
• Confirming responsibility for any required approvals
• Checking what happens if rain interrupts the work

Choosing a Felt Roofing Contractor in Greater London

Different contractors may recommend different materials, preparation and insulation levels. Do not compare only the final price.

Check whether each quotation includes:

• Taking up previous layers and patch repairs
• Inspection and replacement of damaged decking
• The brand, grade and number of felt layers
• Whether a warm roof upgrade is included
• Flashing, upstands and edge details
• Safe working arrangements
• Skip or collection costs
• The proposed start date and duration
• Whether the quoted total includes VAT
• The terms and provider of the guarantee

You should also consider:

• Current public liability insurance
• Examples of previous re-felting work
• Feedback from customers with similar roofs
• Communication and reliability
• The size of any requested deposit

Find Re-Felting Specialists by Town

Our contractor network covers towns, villages and rural locations throughout Greater London. Choose your location to view relevant felt roofing information.

Frequently Asked Questions

How long does felt roof replacement take in Greater London?

Straightforward garage and porch roofs are commonly finished within one or two days. Larger extension roofs normally take several days. The timeframe may increase when the roof contains several levels, rooflights or complex junctions. The contractor should confirm the likely start and completion dates in writing.

Can new felt be installed over the old roof?

It may be possible to overlay an existing roof in limited circumstances, but this is not always advisable. However, covering a wet or damaged roof can trap problems beneath the new membrane. Ask the roofer to explain how the condition of the deck has been checked.

What is the best felt for a replacement roof?

The best system depends on the building, roof design and required lifespan. High-performance torch-on felt is widely used for durable flat roofing. Basic shed felt is unlikely to provide the same lifespan as a properly specified flat roofing membrane.

How long should a new felt roof last?

A correctly installed professional felt system may last around 15 to 30 years. Its lifespan depends on the roof design, weather exposure and membrane specification. The contractor should explain how the chosen product compares with other available materials.

Will damaged roof boards be included in the quote?

Some contractors include a provisional allowance, while others charge separately for each board replaced. Because the full condition of the deck may not be visible until the felt is removed, ask the contractor to state whether the quote includes a set area of board replacement.

Can insulation be upgraded during felt roof replacement?

Insulation can usually be considered while the old covering is removed. This is particularly relevant where the roof covers a heated extension, bedroom or living area. The contractor should explain whether building control involvement may be needed.

Does felt roof replacement require planning permission?

Replacing an existing felt roof without changing its height or appearance is not usually a planning matter. Different requirements may apply where the property is listed or in a conservation area. The property owner should confirm whether planning or listed building consent applies.

Will Building Regulations apply?

Building control involvement may be needed where the roof structure or a large area of covering is altered. Minor repairs may be treated differently. Ask the contractor whether the proposed work is likely to require approval.

Can a felt roof be replaced during winter?

Roofers work throughout the year, although rain, frost and strong wind can cause delays. The contractor may adjust the programme around the weather forecast. Discuss how the building will be protected if rain occurs.

How much deposit should I pay?

Deposits are common for larger roofing projects where materials need to be ordered. Before paying, make sure you understand what the deposit covers. Avoid paying the full price before work begins.

How do I get felt roof replacement quotes in Greater London?

Use our free quote form to describe the replacement work you need. Depending on availability, suitable contractors working in your part of Greater London may get in touch. They can arrange inspections and provide no-obligation quotations. The service is provided at no charge and you remain free to decline every quotation.