D8 Roof Replacement · UK public procurement notice

WORKSTREAM 2 - LIQUID FLAT ROOFING

This workstream covers the design, supply, and installation of liquid-applied roofing systems for refurbishment, replacement, and new-build projects. Liquid roofing systems provide seamless waterproofing solutions that are highly durable, adaptable to complex roof designs, and suitable for a wide range of applications. The workstream ensures that all installations comply with manufacturer specifications, British Standards, and industry best practices. Contractors are responsible for conducting site surveys, ensuring proper material handling and storage, and adhering to manufacturer-approved installation techniques. The scope also includes associated roofing components such as roof lights, rainwater goods, fascia, soffits, and renewable energy solutions where required.

Types of work covered under this workstream:

• Installation of liquid-applied roofing systems, including cold applied, polyurethane-based, polymeric, and reinforced liquid membrane systems. These provide long-lasting waterproofing solutions that can be applied to new-build projects and roof refurbishments.
• Surveys, design, and manufacturer collaboration to ensure the roofing system aligns with structural and drainage requirements, including identifying potential challenges such as substrate preparation and structural reinforcements.
• Small-scale replacements and emergency repairs, covering the removal and replacement of waterproof layers, insulation, and vapour barriers where necessary, ensuring continued protection and system integrity.
• Associated roofing components, such as roof lights, guttering, fascia, soffits, flashings, and roof safety markings, ensuring full compatibility with liquid roofing applications.
• Integration of renewable energy solutions, including the supply and installation of solar PV systems, ensuring safe and effective incorporation with liquid-applied roofing while

This workstream covers the design, supply, and installation of profiled metal roofing systems for refurbishment, replacement, and new-build projects. Profiled metal roofing provides durable, lightweight, and weather-resistant solutions suitable for a wide range of applications, including commercial, industrial, and public sector buildings. The workstream ensures compliance with manufacturer specifications, British Standards, and industry best practices, with an emphasis on quality assurance, structural integrity, and long-term performance. Contractors are responsible for carrying out surveys, ensuring correct material handling and installation, and incorporating necessary safety and drainage provisions. The scope also includes associated roofing components such as roof lights, rainwater goods, fascia, soffits, and renewable energy solutions where applicable.

Types of work covered under this workstream:

• Installation of profiled metal roofing systems, including standing seam, composite panel, built-up metal, corrugated metal, and secret-fix metal roofing. These systems provide robust, low-maintenance solutions suited to various building types.
• Structural repairs and refurbishments, ensuring that substructures, vapour barriers, and insulation are properly installed or replaced to maintain roof integrity and energy efficiency.
• Surveys, design, and manufacturer collaboration to assess existing conditions, develop project-specific solutions, and ensure roofing systems align with wind, load-bearing, and drainage requirements.
• Associated roofing components, including roof lights, guttering, fascia, soffits, flashings, and roof safety markings, ensuring compatibility with metal roofing applications.
• Integration of renewable energy solutions, such as the supply and installation of solar PV systems, ensuring safe and effective incorporation with profiled metal roofing while maintaining weatherproofing and system integrity.

This workstream covers the design, supply, and installation of pitched roofing systems for refurbishment, replacement, and new-build projects. Pitched roofing solutions offer longterm durability, weather protection, and enhanced thermal performance for various building types, including residential, commercial, and public sector properties. The workstream ensures all works comply with manufacturer specifications, British Standards, and industry best practices, with a strong focus on quality assurance, safety, and longevity. Contractors are responsible for conducting surveys, ensuring correct material handling, and carrying out installations in accordance with regulatory requirements. The scope also includes associated roofing components such as roof lights, guttering, soffits, fascias, and renewable energy solutions where required.

Types of work covered under this workstream:

• Installation of pitched roofing systems, including slate, concrete, and clay tiles, as well as standing seam metal pitched roofing incorporating aluminium, zinc, and copper materials. These systems provide durable and weather-resistant solutions for various applications.
• Structural and roof repairs, including the replacement of roof coverings, substructures, insulation, and vapour barriers. This covers both planned works and emergency repairs, ensuring continued weatherproofing and system integrity.
• Associated roofing components, such as roof lights, guttering, fascia, soffits, downpipes, flashings, and roof safety markings, ensuring full integration with pitched roofing applications.
• Flat-to-pitch roof conversions where required, providing structural assessments, design, and installation services to upgrade existing flat roofs into pitched systems for improved drainage and longevity.
• Integration of renewable energy solutions, including the supply and installation of solar PV and solar thermal systems, ensuring safe and effective incorporation with pitched roofing while maintaining waterproofing and structural integrity.
• Scaffolding and access solutions, ensuring safe working conditions for all pitched roofing projects in compliance with Work at Height Regulations and industry best practices.

This workstream covers the integration of both traditional flat and pitched roofing systems within a single project, ensuring a seamless and high-quality solution for refurbishment, replacement, and new-build developments. It is designed to provide flexibility for projects that require multiple roofing types, ensuring compliance with British Standards, manufacturer specifications, and industry best practices. Contractors must follow strict installation guidelines, conduct detailed surveys, and incorporate all necessary structural and drainage considerations. The scope also includes associated roofing components such as guttering, soffits, fascias, roof lights, and renewable energy systems where applicable.

Types of work covered under this workstream:

• Installation of mixed roofing systems, including built-up, torch-on felt, single-ply, hot-melt, slate, and tile, ensuring seamless transitions between different roofing types.
• Flat-to-pitch roof conversions, providing full structural assessments, wind uplift calculations, and compliance with relevant design standards to enhance drainage and longterm durability.
• Integration of associated roofing components such as roof lights, guttering, fascia, soffits, and flashings to ensure compatibility between flat and pitched roofing applications.
• Installation of renewable energy solutions, including solar PV and solar thermal systems, ensuring effective and safe integration while maintaining waterproofing and structural integrity.