Troublesome 10% of Roofs
Belzona has identified that 90% of roof problems occur in only 10% of the roof areas. On flat roofs, the weight of pooled rainwater can cause deflection and subsequent structural damage. Microporous membrane weatherproof coatings can provide reliable solutions for roof repair and maintenance, preventing issues in roofing systems such as protrusion, joints and seams, glazing bars or skylights, and gutters caused by adverse weather conditions.
As membranes prevent water ingress whilst allowing trapped moisture underneath to escape, they allow asset owners to manage moisture control in buildings more effectively. In addition, UV-resistant waterproofing membranes shield buildings and structures from UV radiation, helping to reduce energy consumption.
Protrusion
Any extensions that penetrate through roofs require robust roof sealant materials to ensure durability and prevent leaks. Most sealers used for a pitch pan or exhaust vent can crack due to plasticizer loss, ageing, vibration or roof movement. Sealants used at metal flashings may deteriorate due to adverse atmospheric conditions and may fail if the flashings are not cleaned before installation.
A flashing roof leak or roof vent leak can occur if the asset owners use materials of the wrong diameter. To repair roof flashings and other components of the roofing systems, Belzona offers weatherproofing coatings that adhere onto different substrates and complex geometries.
Joints and Seams
Building movement can affect structural integrity, especially at the joints and seams. This can result in leakage at roof expansion joints and seams. Microporous membranes can effectively address these issues, allowing joint movement while maintaining protective properties.
Glazing Bars/Skylight Sealants
Glazing bars and skylight sealants often fail due to natural expansion and contraction of roofs. Replacing the damaged skylight caulking will not solve the problem as it is likely to recall. Belzona provides liquid-applied membranes – a more permanent solution that offers excellent adhesion to various substrates, along with watertight, weatherproof, and UV-resistant properties.
Gutters
Gutters usually suffer corrosion due to stagnant water, leading to leaks at the joints, through bolt holes, or at the junction and the downspouts. To restore worn-out gutters, asset owners may consider a waterproofing membrane for a seamless transition from the roof to the gutter.
Belzona Breathable Membranes for Roof Repair and Maintenance
Belzona waterproofing membranes for roof repair and maintenance include Belzona 3111 (Flexible Membrane), Belzona 3121 (MR7), Belzona 3131 (WG Membrane).
Belzona 3111 (Flexible Membrane)
Belzona 3111 (Flexible Membrane) is a water-based single-component coating that serves as a long-term roof leakage solution. Its low-odor properties allow the applications in a variety of different environments without disrupting operations. In addition to its rain-resistant properties, Belzona 3111 (Flexible Membrane) exhibited high solar reflectance properties with an average SRI of 99.4%.
Belzona 3121 (MR7)
Belzona 3121 (MR7) is two-component waterproofing solutions for roof leak repair. The system is suitable for emergency repairs, providing protection against rainwater, infrared, and UV radiation. Its superior properties include immediate water-resistance capability after application. It can cure even in fully immersed conditions.
Belzona 3131 (WG Membrane)
Belzona 3131 (WG Membrane) is a moisture-activated urethane coating that can adhere to a wide range of materials. It is suitable for application in cold temperatures and cures down to 0°C (32°).
How To Apply Belzona 3111 (Flexible Membrane) for Roof Repair and Maintenance
STEP 1 – Surface Preparation for Roof Repair and Maintenance
Prepare the surface by removing all dirt, dust, loose materials, grease, oil, and other contaminants. Wash all non-porous surfaces with mild detergent and allow to dry. Use Belzona 9111 (Cleaner Degreaser) if necessary to degrease galvanized steel and glass.
STEP 2 – Surface Conditioner for Roof Repair and Maintenance
Select the appropriate surface conditioner based on substrate.
a. Use Belzona 3911 (PSC Surface Conditioner) for roofing felt, asphalt, brick, concrete and other porous or bituminous surfaces, and leave the conditioner until it is touch dry.
b. Use Belzona 3921 (GSC Surface Conditioner) on glass, slate, lead, copper, aluminum, and other non-porous surfaces except Plexiglas and other plastics. Then, leave the conditioner until it is touch dry.
STEP 3 – Use Reinforcement Sheet before Belzona 3111 (Flexible Membrane)
Lay out Belzona 9311 reinforcing sheet over the conditioned area. Belzona recommends using Belzona 9311 reinforcing sheet to add durability of the protective system.
STEP 4 – Application of Belzona 3111 (Flexible Membrane)
Apply Belzona 3111 (Flexible Membrane) with a soft bristled brush or spray over Belzona 9311 reinforcement sheet and allow the product to dry for around 2-4 hours.
STEP 5 – The Second Coat of Belzona 3111 (Flexible Membrane)
Once cured, apply the second coat of Belzona 3111 (Flexible Membrane) to give a smooth finish.
FAQ
Can waterproofing membranes for roof repair and maintenance be spray applied?
Among Belzona membranes for roof repair, Belzona 3111 (Flexible Membrane) is a water-based roof coating. The material is sprayable, making it suitable for large flat areas.
What is the most suitable material for emergency roof repair?
Belzona 3121 (MR7) is a weatherproofing liquid-applied membrane for emergency roof repair. The material bonds strongly to all common roofing surfaces including slate roofs, tile roofs, asphalt, felt, asbestos cement sheet roofs and metal roofs, even during adverse weather conditions. This system can resist to water immediately after application and cure in fully immersed conditions.
Contact Belzona to Find Out More about Roof Repair and Maintenance
Jake Stephenson originally joined Belzona in 2014 as a Service Support Technician and has since been promoted to Training Facilitator, based at the Company’s Headquarters in Harrogate. With over a decade of experience, Jake plays a key role in leading training workshops and demonstrating the correct application of Belzona repair composites and protective coatings. In addition to leading training courses, he contributes to the creation of sales aids, exhibition materials and product testing.
Jake has been actively involved in the development of many Belzona solutions, including Belzona 4141FR, Belzona 5711, Belzona 5721 and Belzona 1984. This involved testing formulations, refining application methods and assessing product performance in various climates and conditions. He has also participated in live demonstrations at open days in numerous locations including Harrogate, Poland and Germany; showcasing Belzona’s industrial repair and protection solutions.
Holding an AMPP (NACE) Certified Coatings Inspector Level 1, Jake ensures that Belzona’s training aligns with industry standards, providing Belzona’s authorised Distributor Network with expert guidance on surface preparation, application techniques and coating inspections. His technical expertise and hands-on experience make him an invaluable asset to Belzona’s global support network.
