PART 5: CONSTRUCTION SPECIFICATION

600mm x 600mm Porcelain Floor Tiles

BS 8500 RC 28135 ready mix grade,

300mm thick reinforced DBG cement free concrete slab

2 layers of A392 mesh

Single layer butyl tanking membrane with all joints sealed as manufacturer's recommendations over 300mm 500mm

Ravago Ravatherm XPS Visqueen 1200 DPM membrane over 50mm concrete blinded, 

150mm consolidated DOT Type 1 sub-base

Floor U-Value 0.05W/m2K 

EXTERNAL WALLS – non-retaining walls 

Build off floor slab with 140mm thick 7N/mm2 DBG GREENBLOC blockwork with tanking membrane and 300mm EPS insulation over, fixed as manufacturer’s recommendations, with silicone based render system. 

Internally finish wall with sand/lime/cement render and sponge float finish (no skim finish) 

EXTERNAL GROUTED WALLS – retaining 

Earth-bunding laid to angle of repose, circa 35degrees to the horizontal, planted with pasture grasses and wild meadow flowers

Build off floor slab with 2no. Leaves of 100mm 7N/mm2 DBG GREENBLOC

100mm reinforced cement free concrete cavity, with reinforcement c/w B785 mesh central to cavity 

B12 bars @ 200mm 

centres Single ply butyl membrane to external blockwork 

300mm Ravago Ravatherm XPS 

Finish internally with sand/cement render and sponge float finish (no skim finish) 

Wall U-Value 0.1W/m2K 

INTERNAL WALLS 

Form internal partitions in 100mm 7N DBG GREENBLOC cement free concrete blocks, minimum density 120 kg/m2. 

Finish walls with sand/lime/cement render to be sponge float finished 

Clay based wall and ceiling paints 

Roof constructed from 200mm thick insitu readymix DBG cement free concrete. 

2 layers of A392 mesh reinforcement 

Single layer butyl tanking membrane with all joints sealed as manufacturer's recommendations over 300mm 500mm 

Ravago Ravatherm XPS Sedum roofing system Roof U-Value 0.05W/m2K 

WINDOWS 

Softwood triple-glazed windows and doors with pre-finished aluminium cover complete with trickle vents. 

All windows to have triple glazed sealed units to BS 6262, to meet minimum Ug-value 0.75 W/m²K 

Window frames to be fixed to face of block work and sealed with mastic pointing. 

Window U-Value 0.8W/m2K 

WATER BOREHOLE PROGNOSIS REPORT 

Subject to planning consent, a Water Borehole Prognosis Report is to be commissioned with British Geological Society. 

Subject to a viable borehole prognosis, a borehole is to be installed providing Dial Corner with its primary potable water supply. 

PASSIVE STACK VENTILATION 

Passive stack vents to kitchen, utility, bathrooms and WC150mm diameter insulated vent pipes to pass through the roof terminating in a rotating cowl. 

Vent soffit to be manual operated sliding vent 

BACK-UP SPACE HEATING 

100W/m2 electric underfloor heating system to bedrooms, living space and entrance hall. 

ELECTRIC VEHICLE CHARGING POINT 

Electric vehicle charging socket provided outside at a height of 1300mm positioned in carport west wall 

PHOTOVOLTAICS 

Two rows of 350Wp panels on the roof of each house. A total of 60 panels along earth-bunding mounted on proprietary buckets at 10degree pitch. 

TESLA POWERWALL 

A single 13.5KW Tesla Powerwall located adjacent front entrance within the carport 

RAINWATER HARVESTING 

Rainwater downpipes feeding into a 10,000Litre rainwater harvesting vessel supplying utility sink, washing machine, WC cistern and external taps.

CYCLE STORAGE SHEDS 

Cycle store to be built in to the carport 

SEWERAGE TREATMENT PLANT 

An 8person sewerage treatment plant is to process all waste water from Dial Corner and discharge its processed potable water in to a pond. Reedbed planting platforms are to be installed to reduce water born nitrogen levels. 

DRIVE 

Permeable paving system to facilitate percolation of precipitation to mater table. 

FENCES 

Acoustic fences to be installed on the south and eastern boundaries. 

AS-BUILT SAP ENERGY PERFORMANCE CERTIFICATE 

Affirmation of the As-Built SAP calculation to be provided by Elmhurst Energy Services Limited and to achive a minimum of 167A.