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• Single- and double-storey extensions

• Structural alterations and openings

• Integration with existing finishes and materials

• Energy-efficient detailing and airtight construction

• Thermal envelope upgrades

• Airtightness and vapour control

• External wall insulation (EWI)

• Window and door installation to Passive Haus standards

• Full retrofit coordination with architects and energy consultants

• Below-ground tanking and waterproof membranes

• External wall waterproofing and render systems

• Flat roof waterproofing

• Damp protection and remedial work

• Building envelope detailing and performance testing

• Full project management from start to finish