Joinery Services

Roof Structure & Substrate Formation

We provide comprehensive joinery for the structural build-up of roofs, ensuring robust and compliant performance across all roofing types, including flat and pitched systems.

 Structural Joinery Services Include:

• Construction of roof carcassing and timber frameworks
• Installation of ridge beams, rafters, and joists

Forming roof substrates in both:

• Warm roof constructions, and
• Vented/cold roof assemblies,
  in full compliance with BS 6229:2018 and Part L of the Building Regulations.

Our joinery supports the correct layering, ventilation, and insulation build-up to ensure thermal performance and longevity.

Loft Conversions & Dormer Construction

We carry out roof-based joinery works integral to loft conversions, dormer builds, and structural roof adaptations. Our work ensures structural integrity while delivering compliance with British Standards and modern building control expectations.

Dormers & Conversions:

Fabrication of dormer window structures using:

• SIPs panels (Structural Insulated Panels) for speed, insulation, and airtightness
• Traditional timber framing for flexibility in heritage-sensitive or custom projects
• Formation of internal roof structures to accommodate habitable spaces
• Structural floor and ceiling joists to suit new load-bearing conditions
• Bespoke window reveals and surrounds for Velux and traditional rooflights

All joinery and construction elements are delivered to ensure compliance with:

• BS 6229:2018 (Flat roofs)
• BS 5534:2014+A2:2018 (Slating and tiling)
• Local authority building control regulations
• Thermal and airtightness requirements under Approved Documents Part L and Part C

Internal & Heritage Joinery (Project-Specific)

Although our joinery services are primarily roof-related, GNR Roofing is also able to undertake internal finishing joinery in the context of larger roof works, particularly:

• Loft conversions and habitable roof spaces
• Timber framing around roof windows and dormer units
• Internal cladding and boxing around structural features
• Sensitive joinery solutions for heritage properties, ensuring traditional profiles and materials are preserved or matched

We are experienced in working on listed buildings and conservation area properties, where sympathetic detailing and an understanding of traditional joinery techniques are essential.

Why Choose GNR Roofing for Joinery?

• Full compliance with BS 6229, BS 5534, and building control standards
• In-house roofing specialists and joiners for seamless project coordination
• Proven experience with both modern and traditional construction methods
• Capable of delivering structure-to-finish joinery on roof-related projects
• A single, accountable contractor for roofing, envelope, and related structural joinery
• Specialist knowledge in both modern and traditional techniques, including SIPs, zinc finishes, and hardwood cladding
• Strong partnerships with local timber and material suppliers to source high-quality, sustainable products
• Compliance with all relevant British Standards and building regulations
• Tailored joinery solutions that support thermal performance, heritage sensitivity, and aesthetic continuity

For projects that require more than roofing, GNR Roofing offers the structural craftsmanship to support your vision — from forming the frame to finishing the detail.

Timber Cladding, Rainscreens & Building Envelope Solutions

At GNR Roofing, our services extend far beyond traditional roofing. We offer comprehensive expertise in the design, specification, and installation of timber cladding and rainscreen systems as part of our broader building envelope works — delivering cohesive, watertight, and visually striking external finishes.

Timber Cladding & Rainscreen Systems

Our team is experienced in the installation of a wide range of timber cladding solutions tailored to both contemporary and heritage architectural styles.

We supply and fit timber products including:

• Western Red Cedar
• Accoya
• Thermally modified timbers
• Other durable hardwoods and softwoods suitable for UK weather conditions

Bespoke Profiles & Finishes

Working closely with a trusted network of specialist local timber suppliers, we help clients:

• Select the most appropriate timber species for performance and appearance
• Choose profile types (e.g., shiplap, tongue & groove, board-on-board, open joint)
• Specify surface finishes including sawn, planed, charred (shou sugi ban), oiled, or painted treatments

We ensure each solution is both aesthetically aligned and technically suitable, with correct ventilation, fixings, and fire treatment options where required.

Integrated Building Envelope Packages

Our work on external envelopes often includes full façade solutions in conjunction with our roofing and claddinginstallations.

In particular, we offer complete envelope delivery when working with:

• Zinc roofing and cladding systems (standing seam, flat lock, shingle)
• Timber cladding
• Fascias, soffits, bargeboards, and other finishing joinery

This single-contractor model allows clients to simplify procurement and benefit from:

• A fully coordinated approach to the building’s outer shell
• Streamlined sequencing and reduced site management overheads
• Clear accountability for performance, weatherproofing, and detailing

Why Choose GNR for Envelope Cladding?

• Specialist knowledge in timber and zinc envelope systems
• Full integration with roofing and joinery works
• Access to bespoke cladding materials via local, sustainable suppliers
• Capability to deliver turnkey external envelopes ahead of internal fit-outs

Whether for residential, commercial, or heritage projects, GNR Roofing delivers high-quality external envelopes that perform — structurally, thermally, and visually.