D&D ROOFING

New Build Flat Roof Installation with Reinforced Bitumen Membrane

Bauder Installers in Knaresborough, North Yorkshire, and across the North of England

CASE STUDY

Client: Private Residential
Project Type: New Build
Location: 41B Abbey Road, Knaresborough, North Yorkshire, HG5 8HY
Roofing Contractor: D&D Roofing Ltd
Completion Date: June 2025
Roof and Walkway Area: 220 m2

This new build residential development involved the demolition of an existing structure and the construction of a contemporary two-bedroom, single-storey dwelling, complete with a garden studio and rooftop terrace. A high-performance, visually appealing flat roof was required to complement the home’s energy-efficient design and modern aesthetic.

Challenge

The brief called for a robust and durable flat roof system with excellent waterproofing and thermal efficiency. Additionally, the client requested a skylight to bring natural light into the living space, as well as a rooftop PV system for renewable energy generation. The location and logistics where another challenge to overcome as this project was built into a hillside.

Solution

The Bauder Total Roof System, featuring a cut to falls warm roof build-up with reinforced bitumen membranes, was selected for its durability, energy efficiency, and compatibility with additional rooftop features. The self-adhered application was ideally suited for installation over a timber deck, offering a flame-free solution for this residential environment.

Roofing System Specification

Structural Deck:

18mm Timber Deck, providing a solid base for the warm roof construction and ensuring compatibility with self-adhered waterproofing materials.

Waterproofing Build-Up:

BauderTEC KSD FBS – Self-adhesive air and vapour control layer, sealing the structure and preventing condensation.
BauderPIR FA-G16 Tapered Insulation – Promotes effective drainage and contributes to high thermal performance.
BauderTEC KSA DUO Underlayer – Fire-retardant underlayer combining self-adhered and torch-on technology for enhanced waterproofing.
BauderK5K Capping Sheet – Torch-applied SBS-modified bitumen membrane offering superior durability and UV protection.

Additional System Features:

BauderSOLAR F XL PV System – Non-penetrative photovoltaic system enabling clean energy generation with minimal roof load.
Thermally Efficient Skylights – High-performance skylight was installed to introduce natural light into the interior while maintaining airtightness and thermal integrity of the roofing system.

Results

Energy Efficiency: The tapered PIR insulation and skylight worked together to boost natural lighting and reduce heating demand, enhancing energy performance.
Waterproof Reliability: The multi-layer reinforced bitumen membrane system ensures long-term resistance to water ingress.
Sustainable Living: The inclusion of a BauderSOLAR PV system supports a renewable energy lifestyle with reduced electricity costs.
Aesthetic & Comfort: The skylights create a bright, open interior atmosphere while preserving the roof’s thermal envelope.
Guaranteed Performance: A 20-year product and workmanship guarantee gives confidence in the system’s long-term reliability.

Conclusion

The flat roof at 41B Abbey Road, Knaresborough exemplifies the effectiveness of Bauder’s Total Roof System in small-scale residential developments. With a durable waterproofing membrane, modern skylight feature, and integrated solar capability, the roof supports sustainable living while delivering architectural value and practical performance.

Why Bauder Was the Right Fit for This Build

For a home designed around sustainability, energy efficiency, and contemporary style, Bauder offered the perfect roofing solution. The self-adhered membranes provided a safe, flame-free installation method ideal for residential environments, while the integrated BauderSOLAR PV system aligned perfectly with the client’s renewable energy goals. Bauder’s tapered insulation not only improved drainage but also contributed significantly to reducing the building’s overall energy demand. As certified Bauder installers, we knew this system would meet the technical challenges of the site while delivering long-term reliability and visual appeal.

To find out more about our work as a trusted Bauder installer across Yorkshire and the North, get in touch—or browse our other case studies to see more of what we do.

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