SuperHome Database

Farnham, Folly Hill, Blenheim Crescent

House Summary

Justin and Judith Needham

House Type:
4 bed 1973 detached house

Carbon saving:
72% - SuperHomes Assessed  

  • Front facade_Folly Hill
  • Wood stove_Folly Hill

Measures installed:

  • Cavity Wall Insulation
  • Ceiling insulation
  • Double Glazing
  • Floor Insulation
  • Internal Wall Insulation
  • Loft Insulation
  • Low Energy Lighting
  • Roof Insulation
  • Solar PV Panels
  • Solar Water Heating
  • Triple Glazing
  • Water Saving Devices
  • Wood Stove

Upcoming events

This home is not currently open for events, for further information about the eco refurb please contact the home owners using the form below.

Personal story:

I, Justin, am an engineer in the field of electrical and electronic engineering and have spent 25 years in the telecommunications industry. I am now working for my own start-up eco refit and electrical installation business – Circitas Ltd.


The main motivation for this retrofit was a deep belief that unless we sort out the total mess we are making of this planet, our children and future civilizations will have a very severe price to pay. It can only start at home.

Property background:

The property is a standard 1970’s detached 4 bedroom, brick and pan-tile house with a horrid (but very typical) flat roof kitchen extension built in 1976.

Key changes made:

The key changes made to the property include the tearing down and rebuilding of the 1976 kitchen extension where this and other parts of the house had new or extra insulation installed (cavity walls, roof, loft, garage and doors). The majority of the windows were fitted with double or triple glazing, including some of the doors. Renewables used include a woodstove for heating, solar thermal and photo voltaic panels.

Measures installed in detail:

• Cavity wall insulation in extension 60mm PIR in new 100mm
• Ceiling insulation 170mm PIR (in extension)
• Double glazing to all south elevations – some old windows remain
• 100mm PIR floor insulation
• Internal wall insulation: in the extension 60mm PIR wall insulation has been added internally to all remaining 1970’s ground floor cavity walls and 25mm PIR insulation added internally, producing a U value of 0.2
• 350mm loft insulation
• Low energy lighting throughout
• Roof insulation – inefficient flat roof of the 1970’s kitchen extension replaced by roof with 175mm PIR insulation, with a U value of 0.16
• 2.2kWp south facing Yingli photovoltaic panels
• Solar thermal hot water using a large solar thermal tank which generally provides all our hot water from March to October
• Triple glazing to kitchen and all East elevations. Triple glazed velux and triple glazed rear door set
• Water saving measures: bath water can be piped to water butt
• 4.5kW Wood stove as main source of heating with internal flue to heat the bedroom above and basic warm air circulation via floor vents and doors
• Insulated laminated front door set installed. Remedial insulation of internal fire door to garage, providing 7 times improvement

Further Plans:
•Adding flanking extension in same quality to cover further large area of old inefficient house wall
•Totally isolating internal garage with 60mm PIR internal insulation walls and ceiling. Sealing all vented floor joist openings between garage ceiling and house ceiling void (previously no insulation whatsoever: single brick solid on 2 sides and air cavity to bedroom above!)

Benefits of work carried out:

The house is now much more comfortable to live in whilst also being easier on the wallet and the conscience.

Favourite feature:

All of it makes a huge difference. The Solar Thermal is brilliant. Additional insulation demonstrably improves comfort no end and the PV conveniently pays all our energy bills.

Project update:

We have just finished the retro-fit of the ground floor internal insulation (in the guise of Circitas Ltd).  Photos can be found here  and here .

The upstairs internal wall insulation will be underway shortly.

Circitas Ltd, which holds a BPEC rating for Mechanical Ventilation Heat Recovery fitting, has already installed a system and will be quoting more work soon. MVHR in this property is on the cards but only after insulation improvements are complete, thus making the additional gains worthwhile.

Three of the windows are still 1990’s UPVC 2G and not terribly efficient (thick curtains and blinds make up for much of that now). Although it would be a large cost for this improvement, it does need to be done.

Contact this homeowner

Assessment types

SuperHomes Assessed

A home that has been visited and assessed by us and confirmed as reaching the SuperHome standard, which demonstrates a 60% carbon saving.

Homeowner Reported

Information has been provided by the homeowner about their home and energy use prior to the installation of measures and following their installation which demonstrates a carbon saving. This information has not been verified.

Remote Assessed

The homeowner has provided information on their home including what measures have been installed which has enables an assessor working on our behalf to assess their carbon savings. This home has not been visited to verify the measures installed.


This home has not been assessed, but the homeowner has reported what measures have been installed. It may be that this home is awaiting assessment.