Project info

Find out more about Emma and Jonathan’s project in Co Down...

Spec

Extension walls: Dense plaster and skim finish to internal block walls over 100mm dense concrete block over 150mm cavity injected with blown fullfill Ecobead insulation, installed strictly in accordance with manufacturer’s instructions by approved contractor over 100mm dense concrete block over smooth cement render, U-value 0.2W/ sqmK.

Flat roof: Proprietary uPVC fully adhered single-ply membrane and zinc standing seam, 150mm phenolic board, proprietary VCL, with vapour resistance level at least equal to the Trocal, to be taped and jointed as per manufacturer’s detail and specification, immediately above the supporting structure, 18mm exterior grade plywood deck, on treated softwood firrings to achieve 1:40 fall, C16 timber joists @ 400mm centres, 12.5mm plasterboard, U-value: 0.15W/ sqmK.

New floors: 100mm 35N poured screed with A-193 mesh and underfloor heating, to BS 8204 Part 1 2003, 500 gauge vapour barrier, 150mm phenolic board rigid insulation, 150mm ground bearing concrete floor slab, Continuous 1200 gauge polyethylene Type A DPM radon barrier as defined by BS EN13967:2004 laid in accordance with BS 8215:1991 lapped and sealed to DPC in perimeter walls, 50mm blinding layer of sand, min.225mm thick wellcompacted hardcore sub-base.

Windows: black aluminium framed, argon filled low-e, double glazing with a max. U value of 1.6kW/sqmK.

House size: 14.4 sqm

Bedrooms: 1

Heating: air to air heat pump

Ventilation: heat recovery ventilation single unit

Construction: timber frame