Building Projects in Jersey

What we build

• Velux and rooflight retrofits cut into existing slate, tile and flat roofs
• Single and two-storey extensions, from the wall plate up
• Traditional cut roofs, hips, valleys and lean-tos built on site
• Flat roof builds, including warm deck construction and parapet detailing
• Dormer builds, from small pitched dormers to full lead-clad box dormers
• Façade and cladding work, including HardiPlank and timber systems
• Structural timber repairs, wall plates, rafters and purlins
• Roof alterations to accommodate PV solar and rooflights

What the job involves

Every project starts with a site visit, measurements and a written scope. Where the work needs planning permission or building bye-law approval, we talk it through early and coordinate with your architect or surveyor so the roof and structural detailing on the drawings is buildable.

On site we set out and build the structure, whether that's a cut roof, a new flat roof deck or a dormer frame, then move straight into the weatherproofing: membrane, battens, covering, leadwork and rainwater goods. Keeping the same team across both stages is what avoids the usual gaps between carpenter and roofer.

Cladding and façade work follows, with battens, ventilation cavities and closers detailed so the wall build-up can dry, and the whole envelope is left clean, ventilated and watertight.

Common problems we fix

• Extensions built by others where the roof abutment was never flashed correctly
• Dormers with rotten cheeks and failed lead detailing
• Velux retrofits leaking because the flashing kit was fitted to the wrong covering type
• Sagging or undersized rafters and purlins in older cut roofs
• Flat roof decks built with no fall or with insulation in the wrong place
• Cladding fitted without a ventilation cavity, trapping moisture behind it
• Rot in wall plates and rafter feet discovered during strip-out
• Loft conversions where the structure was altered without adequate support

Materials and standards we use

Structural timber is treated and sized for the span and loading, and roof coverings are completed to a high standard. Lead detailing on dormers, abutments and parapets follows Rolled Lead Sheet Association guidelines, and flat roof areas use single-ply or liquid membrane systems installed to the manufacturer's specification.

Cladding and façade systems are installed to the manufacturer's fixing details, with the ventilation and cavity closers the system requires for Jersey's driving rain exposure.

How much does it cost in Jersey

Building project pricing depends on scale, structural complexity and how much of the existing building has to be opened up. A single Velux retrofit is a day or two of work, while a dormer build or extension roof runs over several weeks and needs scaffolding throughout.

Design and approval requirements, ground and access conditions, and freight lead times for cladding and specialist materials all feed into the price. Where the existing structure turns out to need repair once opened up, we price that separately and agree it with you before continuing.

Every project is quoted with a free, written estimate setting out the scope stage by stage.