Flat roofs require robust, weatherproof materials to protect buildings from the elements while providing long-lasting performance. Among the many options available, traditional torch on felt roofing remains one of the most popular and reliable choices for flat and low-pitched roofs in residential and commercial properties. At RGS Roofing, based in Hornchurch, Essex, we specialise in expertly installing and repairing torch on felt roofs, delivering durable protection tailored to your needs.
In this blog post, we’ll explore what torch on felt roofing is, why it continues to be a preferred flat roofing solution, the installation process, maintenance tips, and factors to consider when choosing this roofing method.
What is Traditional Torch On Felt Roofing?
Traditional torch on felt roofing is a method that has stood the test of time. It involves applying bitumen-based roofing felt sheets to the flat roof surface using a propane torch. The underside of each felt sheet is heated with the flame to melt the bitumen, creating a strong adhesive bond to the roof substrate.
This process results in a continuous waterproof membrane that protects the building from water ingress, wind, and other weather challenges. Torch on felt is commonly used on flat or shallow-pitched roofs on homes, garages, extensions, and commercial buildings.
The system typically consists of multiple layers of bitumen felt, often reinforced with a polyester or fiberglass base for added strength and longevity.
Benefits of Torch On Felt Roofing
Durability and Weather Resistance
One of the main reasons torch on felt roofing remains popular is its proven durability. When installed by skilled professionals like the RGS Roofing team, it provides a tough, watertight seal that can last 20-30 years or more with regular maintenance.
The bitumen in the felt acts as a flexible, waterproof barrier resistant to rain, snow, and wind. Its ability to accommodate slight movements in the roof structure reduces the risk of cracking or leaks.
Cost-Effective Solution
Torch on felt roofing offers excellent value for money. It is generally more affordable than some modern flat roofing materials, such as EPDM rubber or liquid-applied membranes, making it a cost-effective choice for many property owners.
This affordability does not come at the expense of performance, provided the installation is done correctly and maintained well.
Flexibility and Ease of Installation
The bitumen sheets have some flexibility, allowing them to conform to irregular roof surfaces and accommodate minor structural shifts over time without damage.
Torch on felt roofing can be installed relatively quickly by experienced roofing contractors. The heat-welding process ensures a strong bond between sheets, creating a seamless and reliable waterproof layer.
Repair and Maintenance Friendly
Small tears, blisters, or punctures that may occur due to weather or foot traffic can often be repaired quickly and economically. This ease of repair extends the life of the roof and minimises disruption.
Installation Process of Torch On Felt Roofing
Step 1: Roof Preparation
Proper preparation of the roof deck is vital for a successful torch on felt installation. The surface must be clean, dry, smooth, and free from any loose materials or sharp objects that could damage the membrane.
Depending on the roof’s condition, the substrate might need repairs or additional insulation layers before felt application.
Step 2: Applying Primer
A primer coat is applied to the roof deck to improve adhesion between the surface and the bitumen felt. This step ensures that the felt sticks securely, preventing bubbles or lifting over time.
Step 3: Laying the Felt Sheets
Large rolls of bitumen roofing felt are unrolled onto the roof surface. The underside of each sheet is heated using a propane torch, melting the bitumen to activate its adhesive properties.
The installer carefully presses the heated felt onto the roof substrate, ensuring smooth application and avoiding wrinkles or air pockets.
Step 4: Overlapping and Sealing
Each sheet overlaps the previous one by several inches, creating a continuous waterproof barrier. The overlapping edges are heated and sealed with the torch to weld the layers together, providing a watertight joint.
Additional layers or reinforcement fabric can be added for increased strength and protection, particularly in high-traffic areas or where weather exposure is severe.
Step 5: Finishing Touches
Once the roofing felt is fully applied and sealed, flashings around edges, chimneys, vents, and gutters are fitted to prevent water ingress at vulnerable points.
Optionally, a mineral or gravel surface can be added on top of the felt for additional UV protection and durability.
Maintenance Tips for Torch On Felt Roofs
Proper maintenance extends the life of a torch on felt roof and prevents costly repairs. Here are essential tips to keep your roof in top condition:
Regular Inspections: Check your roof at least twice a year and after severe weather for signs of damage like blisters, cracks, splits, or punctures.
Clear Debris: Remove leaves, branches, and dirt buildup that can trap moisture and cause deterioration.
Repair Damage Promptly: Small problems can escalate quickly if left untreated. Contact a professional roofer like RGS Roofing to carry out repairs as soon as issues are identified.
Protect Against UV Damage: Bitumen felt can degrade under prolonged exposure to UV rays. Applying a protective coating or covering the roof with gravel or mineral surfacing can shield the membrane.
Avoid Excessive Foot Traffic: Minimise walking on the roof to reduce wear and tear. Use designated walkways if access is necessary.
Common Issues with Torch On Felt Roofing and How to Address Them
Even the best roofing materials require upkeep and occasional repairs. Some typical issues include:
Blistering: Trapped moisture or poor installation can cause blisters to form under the felt. These need to be punctured and sealed by a professional to prevent leaks.
Cracking or Splitting: Over time, weathering and structural movements can cause cracks. Prompt patching helps maintain waterproof integrity.
Lifting or Bubbling: This usually indicates adhesion failure. Re-bonding or replacing affected areas can restore the roof’s performance.
Edge Damage: Flashings or edges can degrade due to wind or rain exposure and require resealing or replacement.
Why Choose RGS Roofing for Torch On Felt Roofing?
At RGS Roofing, we bring years of expertise in installing and repairing traditional torch on felt roofs in Hornchurch, Essex, and the surrounding areas. Our commitment to quality workmanship ensures your flat roof is installed to the highest standards using premium materials.
We offer:
Free consultations and tailored roofing solutions
Competitive pricing and transparent quotes
Experienced, certified roofing professionals
Reliable aftercare and maintenance advice
Our goal is to protect your property with a roofing system that combines durability, performance, and value.
Contact RGS Roofing Today for Torch On Felt Roofing Services
If you are considering a new torch on felt roof or need repairs to your existing flat roof, RGS Roofing is here to help. Call us today on 01708 702 216 or email rgsroofingservices@gmail.com for expert advice and a free, no-obligation quote.
Trust the Hornchurch roofing experts to keep your property safe, dry, and secure with professional torch on felt roofing solutions.
