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Silver Certified Eco Refurbishment and Extension

An eco refurbishment and extension of a 1960’s house in Grayshott, Surrey.

It was assessed using Passivhaus software and designed to AECB Carbonlite Silver Standard.

The Specific Space Heating demand of 278 kWh/m²a as existing, was reduced to 38 kWh/m²a. Air leakage was improved from 9.5 air changes per hour to 2.5  air changes per hour.

Improvements include external wall insulation using wood fibre, constant running mechanical extract ventilation, Katzbeck triple glazing.

The project was certified under the AECB Carbonlite Silver Standard.

See the Low Energy Buildings database entry for details.

It was nice to hear from the clients 5 years later saying “we are still loving the house in Grayshott and still think of you and all the hard work you put into it!