Flat Roofing Contractors Glasgow

Unlike many other companies you may find who advertise online as flat roofing contractors, Garage Roofs Glasgow Ltd. are a specialist flat roofing company. Our owner manages all of the installations himself, providing invaluable experience, fantastic value for money and a guarantee your project will be completed successfully first time.

The majority of roofs installed by Garage Roofs Glasgow are flat roof surfaces designed to waterproof either the main roof of your home or extensions of your home. This includes structures such as garages, home extensions, porches, ledges, carports, garden rooms, sheds and any other number of buildings with a flat surface.

Quality installation and materials for flat roofing is imperative, as it does not come with the natural waterproof benefits of a pitched roof which has a slope, allowing water to easily run off it.

We often install EPDM Firestone rubber membrane due to its amazing waterproofing benefits and the fact it comes with a 20 year manufacturer warranty as standard and a 50 year plus lifetime expectancy. Other options include metal cladding which has similar long lasting benefits and to which people often comment positively on the stylish designs and wide range of colours available.

If done badly, flat roofing can have issues such as ponding water build ups, leaks that can sometimes not be repaired, requiring a full roof replacement. Other common problems on flat roofs include blistering and bubbling, which can develop into bigger problems if left unaddressed. 

We have a wealth of experience fitting high quality and affordable solutions on all types of structures, with a solid reputation as reliable flat roofing contractors serving Glasgow and Central Scotland.

EPDM Firestone Rubber Flat Roof

Flat Roof Specialists Glasgow

Due to some of the issues caused from poor installation highlighted above, hiring a flat roof specialist is always a wise move if you need flat roof repair and especially any replacement work carried out. 

Flat roofs can present unique challenges when it comes to water management. Unlike sloped roofs, flat roofs do not naturally shed water, which can lead to pooling and potential leaks if not properly maintained. Here are some common water issues associated with flat roofs and ways to address them:

  1. Ponding Water: One of the most common problems with flat roofs is ponding water, where water accumulates and does not drain properly. This can lead to deterioration of the roof membrane and structural damage over time.

    • Solution: Ensure that the roof has proper drainage systems, such as scuppers, drains, or gutters. Regularly inspect and clean these systems to prevent blockages. Additionally, consider installing tapered insulation to promote water runoff.
  2. Leaks: Leaks can occur due to damaged roofing materials, poor installation, or sealant failure.

    • Solution: Conduct regular inspections of the roof surface for signs of damage or wear. Repair any cracks, tears, or gaps in the roofing membrane promptly. It’s also important to inspect flashings around vents, chimneys, and edges, as these are common areas for leaks to occur.
  3. Blistering and Bubbling: Heat and moisture can cause the roofing material to blister or bubble, compromising its integrity.

    • Solution: Ensure proper ventilation beneath the roof deck to reduce heat buildup. Use reflective coatings or materials to reduce UV exposure and thermal stress on the roof.
  4. Ice Dams: In colder climates, ice dams can form at the roof’s edges, preventing proper drainage and causing water to back up under the roofing material.

    • Solution: Ensure proper insulation and ventilation in the attic space to maintain consistent temperatures and prevent snowmelt. Install ice and water shield membrane along the eaves to prevent water infiltration.
  5. Material Degradation: Over time, roofing materials can degrade due to exposure to UV rays, extreme temperatures, and moisture.

    • Solution: Choose high-quality roofing materials that are designed for flat roofs and have good UV resistance. Regularly inspect and maintain the roof to ensure its longevity.
  6. Poor Installation: Improper installation of roofing materials and systems can lead to various water issues.

    • Solution: Hire an experienced and reputable roofing contractor like ourselves, who specialise in flat roofs. Ensure that all materials and systems are installed according to manufacturer’s guidelines and industry best practices.

Regular maintenance and inspections are crucial for identifying and addressing water issues early on, before they escalate into more significant problems. It’s also advisable to consult with roofing professionals to assess your specific roof and determine the best strategies for water management and maintenance.


About Garage Roofs Glasgow Ltd.

Garage Roofs Glasgow Ltd. was established in 2021, building on our longstanding partnership with Collins Roofing & Solar Solutions. Our owner brings 24 years of hands on roofing experience to the table and is specialist in flat roofing. Over the years, we’ve successfully installed thousands of flat and garage roofs throughout Glasgow and Central Scotland, earning a reputation for delivering exceptional value as reflected in our consistently positive customer reviews.

While we’re well versed in all facets of roofing, our true specialisation lies in garage and flat roofing. Our extensive experience will be evident during your initially free survey, providing you with instant confidence and re-assurance you have chosen the best company for the job.

Our expertise encompasses flat garage roof replacement and repair, carport roofs, extensions, porches, garden rooms, sheds and more all available in wide range of flat roofing solutions, including EPDM Firestone rubber roof membrane.


Each quote is personally prepared by the company owner, reflecting our commitment to transparency and honest pricing. We believe in straightforward, fair quotes without any high-pressure sales tactics. Our high-quality workmanship, proven track record, and competitive rates speak for themselves, eliminating the need for aggressive sales strategies.

Flat Roof Repair Glasgow

Depending on the size and severity of the issue, some flat roof leaks and other minor damage can be repaired. The possibility of repair also depends on the type of material on your roof, with some surfaces such as EPDM rubber membranes not having much scope for repair once part of it is compromised.

Whether you’re dealing with leaks, cracks, or other issues, timely and proper repairs are essential. Here are some of the most common issues that require repair on flat roofs:

Leaks: Minor leaks and drips are a common problem, look for signs of water stains, mould, or dampness on the ceiling or walls inside your building.

Craks, Tears and Blisters: Check the roof surface for cracks, tears, blisters, or areas where the membrane has been lifted or separated.

Drainage Issues: Ensure that gutters and downpipes are clear of debris and functioning properly to prevent water pooling and damage. If there has been any damage to the gutters and downpipes, this is normally a fairly quick and easy problem to solve.

Flat Roof Repair in Glasgow
Fixing Flat Roof Structure

Types Of Flat Roof Replacement

There are various types of flat roof surfaces that people contact us about replacing, listed below is a breakdown of each type of flat roofing replacement and some pictures of our workmanship.

Garage Flat Roof Replacement

As you might expect, given our company name is Garage Roofs Glasgow Ltd, our most popular flat roof enquiry tends to be for garage flat roof replacement.

A garage flat roof refers to the type of roofing commonly used on garages that have a flat or nearly flat roof design. These roofs are typically constructed with a slight slope to allow for water drainage. Here are some key aspects, considerations and materials for garage flat roofs:

EPDM rubber: A synthetic rubber membrane that is durable and resistant to UV rays, weathering, and tears.

TPO (Thermoplastic Polyolefin): A single-ply membrane that offers excellent durability and energy efficiency.

Built-up Roofing (BUR): Consists of multiple layers of asphalt and felt or fabric, providing good waterproofing but can be heavier.

Modified Bitumen: Asphalt-based roofing with added polymers for improved flexibility and durability.

Metal Cladding: We regularly install metal cladding which acts as a safe sealant for asbestos garage roofs and like EPDM rubber, has a long lasting shelf life.

See the before and after pictures below showcasing the metal cladding we install.

"Was looking for solution to sort my old asbestos garage roof and this company provided everything I was looking for. The new overlay roof looks great and has kept everything dry since completion. No hesitation in recommending them as neat, tidy and professional throughout"

Professional Garage Flat Roof Installation

Proper installation is crucial for the longevity and performance of a garage flat roof. This includes ensuring a solid and clean substrate, proper insulation, and effective drainage systems like gutters and downspouts.

Other aspects such as efficient flashings around vents, chimneys, and edges will always be carefully installed to prevent water infiltration and other potential issues.

Garage Flat Roof Replacement
after garage roof replacement Bearsden, Glasgow
EPDM Rubber Flat Roof Surface
Old Garage Flat Roof
Replacement Garage Flat Roof
"I got a new garage roof fitted on to existing leaking garage. The new roof looks great and finished to a high standard. Job completed on time without any fuss or issues..great job."

Longer Lifespan

Once installed, EPDM rubber roofing requires minimal maintenance. Thanks to its inherent durability, Firestone rubber doesn’t demand regular upkeep and boasts an expected lifespan of over 50 years!

Felt Flat Roof Replacement

Often people approach us who have old felt on there roof that is damaged and needing replaced. Removing an old felt roof and replacing it requires careful planning, the proper tools, and experience to ensure a successful and long-lasting result.

"Removed old felt garage roof that was sagging and at risk of falling in and replaced it with insulated metal sheeting. Competitive price, left the place immaculate and got the whole job done within a day!"

Old Roof Removal

Stripping: Carefully remove the old felt roofing material, starting from the edges and working your way inward. Use tools like a roofing spade or scraper to strip away the old felt.

Roof Inspection: Once the old felt is removed, inspect the roof deck for any damage, rot, or structural issues that need to be addressed before installing the new roof.

Preparation for New Roof

Cleaning: Clean the roof deck to remove debris, dust, and any remaining adhesive from the old felt.

Repair: Repair any damaged or rotted areas on the roof deck. Replace any damaged or missing boards or sheathing as needed.

Priming: Apply a primer to the cleaned and repaired roof deck to improve adhesion and waterproofing for the new felt.

New Roof Installation

Materials: Choose high-quality roofing felt that is suitable for your climate and meets local building codes and regulations.

Installation: Follow the manufacturer’s guidelines and industry best practices for installing the new felt roof. Ensure proper overlap, sealing, and flashing around edges, vents, chimneys, and other penetrations.

Adhesive: Use appropriate adhesive or roofing cement to secure the felt to the roof deck and ensure waterproofing.

Finishing Touches and Inspection

Sealing: Apply sealant or roofing cement to seams, edges, and penetrations to enhance waterproofing and durability.

Flashing: Install or replace flashing around vents, chimneys, and edges to prevent water infiltration.

Inspection: Conduct a thorough inspection of the new felt roof to ensure quality installation and address any issues or concerns.

See pictured below a before and after of an old felt roof replacement job completed in Glasgow.

Extension Flat Roof Replacement

House extensions are another common type of flat roof replacement we get regular enquiries for. Replacing the roof on an extension is a significant undertaking that requires careful planning, preparation, and execution to ensure long-lasting and effective results. Extension roof replacement typically applies to older house extensions, as people having a new extension built will have the roof option packaged into the deal. However, if your extension roof has an issue or is simply older and needing replaced, here’s a short guide on extension roof replacement:

Assessment and Planning:

Inspection: Start with a thorough inspection of the existing roof to identify any damage, wear and tear, or structural issues.

Planning: Determine the scope of the project, including materials needed, budget, and timeline. Consider factors like insulation, ventilation, and drainage.

Choosing Materials:

Roofing Materials: Options include asphalt shingles, metal roofing, tile, slate, or flat roofing materials like EPDM or TPO, depending on your preferences, budget, and the design of your extension.

Insulation: Choose appropriate insulation to improve energy efficiency and comfort. Options include fibreglass, spray foam, or rigid foam insulation.

Preparation and Installation:

Preparation: Clear the work area around the extension, remove old roofing materials, and prepare the roof deck.

Installation: Follow the manufacturer’s guidelines and industry best practices for installing the chosen roofing materials. Ensure proper flashing, ventilation, and drainage to prevent leaks and moisture problems.

Inspection and Maintenance:

Inspection: After the installation is complete, conduct a thorough inspection to ensure quality workmanship and address any issues promptly.

Maintenance: Regularly inspect and maintain the roof to prolong its lifespan and prevent potential problems. Clean gutters, check for signs of damage or wear, and address any issues promptly to avoid costly repairs in the future.

Benefits of Extension Roof Replacement:

Improved Protection: A new roof provides better protection against leaks, water damage, and weather-related issues so prevalent in Glasgow and Scotland.

Energy Efficiency: Proper insulation and ventilation can improve energy efficiency, reducing heating and cooling costs.

Enhanced Appearance: A new roof can enhance the curb appeal and value of your home, especially if you choose high-quality materials and a design that complements the overall aesthetics.


Building Regulations: Ensure compliance with local building codes and regulations when replacing an extension roof. This may include requirements for insulation, ventilation, and structural integrity.

Warranty: Check the warranty for the roofing materials and workmanship to understand coverage and requirements for maintenance and repairs.

By following these steps and considerations, you can ensure a successful and long-lasting extension roof replacement that meets your needs and enhances the value and comfort of your home.

Extension Flat Roofs Glasgow

Here are some pictures from extension flat roof surfaces we have installed in Glasgow and the surrounding area.

"Had a leaky asbestos side extension roof which Danny and his team fixed with a metal roof. No more leaks. No mess Good job should have had it done years ago."

Flat Carport Roof Replacement

Although they can often have a small slope, carport roofs are almost always a flat roof surface. They are available in a range of materials including timber, metal cladding and EPDM rubber membrane. Flat carport roofs are a popular choice for providing shelter to vehicles while also complementing the design of the property. Like other flat roofs, they require specific considerations and maintenance to ensure durability and performance.

Carport Flat Roof Installation

Slope: As stated, even though it’s a “flat” roof, a slight slope is necessary for proper water drainage.

Flashing: Proper installation of flashings around edges, vents, and any penetrations is crucial to prevent water infiltration.

Support Structure: Ensure the carport’s support structure is strong enough to support the roofing material and withstand wind and other weather conditions.


Inspection: Regularly inspect the roof for signs of damage, wear, or pooling water.

Cleaning: Remove debris, leaves, and other materials from the roof surface and gutters to prevent water blockages.

Sealants and Coatings: Consider applying sealants or coatings to enhance waterproofing and UV protection, depending on the roofing material.


Cost-effective: Flat roofs are generally more cost-effective compared to pitched roofs.

Versatility: Flat roofs offer flexibility in design and can be easily incorporated into various architectural styles.

Additional Space: Can be used as a deck or storage area, depending on the design and load-bearing capacity.

By choosing the right materials, ensuring proper installation, and following a regular maintenance schedule, a flat carport roof can provide durable and reliable protection for your vehicles for many years to come. Consulting with roofing professionals can help you make informed decisions tailored to your specific needs and budget.

"Brand new carport installed last month, big thank you to Danny for providing a wonderful service at a fair price. If you need a reliable local roofer then call Garage Roofs Glasgow!"

Porch Flat Roof Replacement

Although generally a small roof, just like on all the other flat roofs mentioned above, when replacing the flat roof on a porch it is still a task that requires careful planning, the proper materials, and skilled installation to ensure maximum durability and performance.

Preparation and Installation

Preparation: Clear the work area around the porch, remove old roofing materials, and prepare the roof deck.

Installation: We always follow the manufacturer’s guidelines and industry best practices when installing your chosen roofing materials. Ensure proper flashing, ventilation, and drainage if applicable.

Porch Flat Roof Replacement in Glasgow

Conservatory Flat Roof Replacement

A conservatory flat roof refers to the type of roof commonly used on conservatories that have a flat or nearly flat design, often older more traditional types of conservatory like the one shown below. Unlike modern pitched and hexagon roofs, conservatory flat roofs are typically designed to be more horizontal or have a minimal slope. Garage Roofs Glasgow Ltd offers certain types of conservatory roof replacement in Glasgow and Central Scotland


Garden Room Flat Roof Replacement

In recent years and especially during the Covid-19 outbreak, garden rooms and outdoor garden buildings such as man caves and functional sheds saw a huge rise in popularity. Of course all of these structures need a waterproof roof. Many people who had older garden buildings, realised they had leaks or unsuitable roofing solutions due to most of them having a flat roof surface.

We offer a garden room and outdoor garden building roof replacement service, see pictured below an example of a garden room roof replacement.

"Quality new single piece, black rubber shed roof with smart tough black PVC trim - I think you could empty a swimming pool onto my shed roof now (and in this art of the world, that happens)!"

Summer House Flat Roof Replacement

Summer house roof replacement is generally the same as garden rooms, sheds and other outdoor garden buildings.

See pictured below a job in the East End of Glasgow for a long garage with a summer house built on the side that required a roof replacement. It was originally a felt roof that was constantly leaking.  We stripped it back but was completely rotten underneath, then fitted new 7 x 2 joists to raise it up slightly.  Sheeted the roof with 18mm sterling boards. Lay one piece Firestone EPDM rubber before fitting plastisol coated metal flashings round the edges.


Other Flat Roof Replacement

There are other types of flat roof found on your home including ledges and surfaces that make up the main roof of your home. See pictured below some of these roofs that we have installed in Glasgow and Central Scotland.

Ballasted Flat Roof Systems

Ballasted flat roof systems are practical for various purposes including flat roof mounted solar panels. We have experience various types of flat roofs with ballast gravel.

What is a ballasted flat roof system?

A ballasted flat roof system is a type of roof design where the roof membrane is secured in place using ballast, which is typically gravel, pavers, or other heavy materials. Unlike mechanically attached or fully adhered roof systems, a ballasted roof relies on the weight of the ballast to hold the roofing membrane in place. Here’s an overview of ballasted flat roof systems:


Roof Membrane: Typically made of materials like EPDM (Ethylene Propylene Diene Terpolymer), TPO (Thermoplastic Polyolefin), or PVC (Polyvinyl Chloride), which are laid over the roof deck.

Insulation: Provides thermal resistance and is placed on top of the roof deck, beneath the membrane.

Ballast: Heavy materials like gravel, river rock, concrete pavers, or lightweight pavers are placed on top of the membrane to hold it in place and protect it from UV rays and weathering.

Roof Deck: The structural base of the roof, which supports the insulation, membrane, and ballast.


Cost-effective: Ballasted roofs can be more cost-effective to install compared to mechanically attached or fully adhered systems because they require fewer fasteners and less labor.

Thermal Efficiency: The ballast and insulation provide an additional layer of thermal resistance, improving energy efficiency and reducing heating and cooling costs.

UV Protection: The ballast helps protect the roofing membrane from UV rays, extending its lifespan.

Noise Reduction: The ballast can help reduce noise from rain, hail, or other external sources.


Weight: The weight of the ballast adds additional load to the roof structure, so it’s essential to ensure that the roof deck and supporting structure can handle the added weight.

Maintenance: While ballasted roofs generally require less maintenance compared to other roof systems, periodic inspections are still necessary to check for damage, ensure proper drainage, and maintain the ballast layer.

Wind Uplift: Proper design and installation are crucial to prevent wind uplift, especially in windy or storm-prone areas. The ballast and membrane must be adequately secured to withstand wind forces.

Water Drainage: Proper drainage is essential to prevent water pooling and ensure the longevity of the roofing system. The ballast should be sloped to allow for water runoff and paired with adequate drainage systems like scuppers or drains.


Preparation: Clean and prepare the roof deck, ensuring it’s free of debris, and install the insulation.

Membrane Installation: Lay the roofing membrane over the insulation and secure the edges and seams as required.

Ballast Placement: Spread the ballast evenly over the membrane, ensuring proper coverage and weight distribution. The thickness and type of ballast can vary depending on the design and specific requirements of the roof system.


Inspections: Regularly inspect the roof for signs of damage, wear, or issues with the ballast layer.

Cleaning: Remove debris, leaves, and other materials from the roof surface and drains to ensure proper water drainage and prevent blockages.

Repairs: Address any issues or damage promptly to prevent water infiltration and maintain the integrity of the roofing system.

By understanding the components, advantages, considerations, and maintenance requirements of a ballasted flat roof system, you can make informed decisions about whether it’s the right choice for your building or project. Consulting with roofing professionals can help you navigate the design, installation, and maintenance processes to ensure a durable and reliable roofing solution tailored to your specific needs and budget.

Flat Roof before Ballast is applied
Ballasted Flat Roof System

Get A Free Flat Roof Quote

As you can see from our comprehensive flat roofing page, we cover all aspects of flat roofing and you will be in good hands if this is something you are in the market for. Give us a call or complete our short contact form to arrange a free, no-obligation home survey.

Flat Roofing Glasgow Reviews

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Flat Roofing Company with a strong reputation

Garage Roofs Glasgow Ltd. work in partnership with Collins Roofing & Solar Solutions with over 50 years combined experience working in the roofing industry in Glasgow and Central Scotland. Our team has dozens of legitimate 5 star reviews on Google, Facebook and Yell.