Flat Roof Repair at Leeds Commercial Street
Project Overview
DVC Commercial Roofing Contractors, a trusted roofing contractor based in Leeds, partnered with Marcon Fit Out to deliver a high-quality flat roof repair on Commercial Street, Leeds. The project involved the refurbishment of a 226 m² flat felt roof on a three-storey retail building. Utilising the Bauder Total Roof System, our team ensured a durable and energy-efficient roofing solution. The project was completed over a five-week period, meeting both time and quality expectations.
The Challenge
High foot traffic
Commercial Street is one of the busiest shopping areas in Leeds, with constant footfall and a dense concentration of retail outlets. Carrying out roofing works in such a high-traffic environment required careful planning and heightened safety measures. To minimise disruption and ensure public safety, our team strategically scheduled work during quieter hours, allowing for efficient project delivery without compromising pedestrian access or retail operations.
Roof life span due
The roof inspection revealed that the existing overlay system was over 15 years old, while the original asphalt layer dated back more than 50 years. Prolonged exposure to UV radiation had further accelerated deterioration, compromising the roof’s integrity and performance. A full replacement was necessary to ensure long-term durability and weather resistance.
Poor waterproofing
The existing waterproofing system is slightly creased in several places, and the lap joints have opened up, allowing water to ingress the overlay system. The overlay system cap sheet has areas of sparse mineral coverage indicative of long-term UV exposure and wind shear. The quality of the waterproofing details on these items is poor and does not align with good roofing practices. This particular structure is not fit for purpose and should be replaced.
Roof falls and poor drainage
The existing waterproofing showed multiple signs of failure, including visible creasing and open lap joints that allowed water to penetrate the overlay system. The cap sheet exhibited sparse mineral coverage, a clear indication of long-term UV degradation and wind exposure. Additionally, the detailing throughout the waterproofing was substandard and did not meet accepted roofing best practices. As a result, the system was deemed unfit for purpose and required complete replacement.
The Solutions: Bauder Total Roof System
To address the roofing issues at Commercial Street, our team implemented the Bauder Total Roof System— a high-performance, warm roof solution comprising a self-adhered, two-layer reinforced bitumen membrane. The repair process began with the complete removal of the existing, compromised waterproofing system down to the original timber-boarded deck, ensuring a clean foundation for the new installation and long-term durability.
The build-up consisted of the following key layers:
- First layer: BauderFLEX TA 600 Nailed Layer, an SBS Elastomeric Bitumen Isolating/Nailing Layer, featuring a polyester fleece for nail holding strength and a smooth foil top surface.
- Air and Vapour Control Layer: BauderTEC KSD FBS, a self-adhesive elastomeric bitumen air and vapour control layer; mica finished upper surface.
- Insulation: BauderPIR FA G16 Tapered Insulation. It is Foil-faced and shaped to create effective drainage falls.
- Underlayer: BauderTEC KSA DUO, a self-adhesive elastomeric bituminous membrane; glass lattice reinforcement; ‘DUO’ lap technology.
- Capping sheet: Bauder K5K, a torch-bonded, elastomeric, bitumen capping sheet
Outcome
The completed project is backed by a comprehensive 20-year guarantee from Bauder, covering the roofing system, materials, design, and workmanship. This guarantee is only valid when installed by a Bauder-approved contractor, such as DVC Roofing. Ensuring full compliance with the manufacturer’s standards. The system includes high-performance waterproofing membranes, thermal insulation, an air and vapour control layer, and secure attachment of all components, delivering long-term reliability and protection.
FAQ: Flat Roof Repair in Leeds
1. How long does a flat roof repair project in Leeds usually take?
The timeline for a flat roof repair varies based on factors such as roof size, project complexity, and weather conditions. As an example, our 226 m² flat roof replacement on Commercial Street—completed using the Bauder Total Roof System, took approximately five weeks from start to finish.
2. What is the Bauder Total Roof System, and why was it used?
The Bauder Total Roof System is a high-performance, multi-layer bitumen roofing solution designed to deliver exceptional durability, thermal insulation, and waterproofing. We selected this system for the Leeds Commercial Street project due to its proven reliability in commercial settings, efficient drainage design, and comprehensive 20-year guarantee covering materials, workmanship, and design.
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