SuperHome Database

Shrewsbury, Bayston Hill

House Summary

Claus Best

House Type:
1950's detached concrete bungalow

Carbon saving:
72% - SuperHomes Assessed  

Reported saving on bills:

Total invested:

  • Shrewsbury, Hay Tor SuperHome – MHRV system
  • Shrewsbury, Hay Tor SuperHome – MHRV system

Measures installed:

  • Airtight Membrane
  • Condensing boiler
  • External Wall Insulation
  • Loft Insulation
  • Low Energy Appliances
  • Low Energy Lighting
  • Mechanical Ventilation Heat Recovery
  • Roof Insulation
  • Solar Water Heating
  • Triple Glazing
  • Water Saving Devices
  • Wood Stove

Upcoming events

Early interest in Open Days encourages SuperHome owners to host more events. If you'd like to visit this property please contact the owner and let them know. SuperHomers are often happy to respond to questions about their refurbishment project by email between times. Please read ‘more on contacting this SuperHomer’ before you make contact.

What visitors are saying

"Interesting to see the theory put into practice!"

"Excellent visit, made friendly by a very knowledgeable couple - has given us lots of ideas."

Personal story:

Retrofit advice and installation services are my business and my passion is saving the environment and helping people to live a more comfortable and sustainable life with lower costs.
I have been working as carpenter for over 20 years then moved into a more specific area of retrofitting properties.
After attending a talk by Andy Simmonds about his PassivHaus retrofit (see Superhome – Grove Cottage, Hereford) in 2009, I decided to take a similar step and find out what can be achieved with these extreme looking measures.
I have dealt with most of the retrofitting items myself and lots of research, since there wasn’t much knowledge easily available as yet.


We bought Hay Tor in Dec. 2009 with the intention of retrofitting it to a highly insulated and airtight standard. My plan was also to make it into a ‘show-home’, so people could appreciate first hand what can be achieved and lead by example. Apart from appreciating a comfortable and lower cost home I want to use Hay Tor as my show piece work-wise.

Also see:
Property background:

1950’s concrete system bungalow with metal framed single glazed windows and french doors. Mould on most window reveals next to metal frames.
Inefficient gas central heating with small hot water cylinder. The central heating couldn’t heat the house during the cold winters.

Key changes made:

• Triple glazed wooden frame windows with aluminium splash strips, U value 1.0 W/m2K
• 100mm Kingspan K5 wallboard external insulation, U value 0.21 W/m2K
• 75mm rockwool loft insulation above ceiling
• 125mm polyurethane foam roof insulation, U value 0.19 W/m2K between + under rafters
• Itho HRU Eco 4 Whole House MVHR
• Viessmann system boiler with weather compensating feed, room stat, programmer and TRVs on all radiators
• 4m2 Solar thermal panels
• Woodstove for secondary heating in living room
• Low energy lighting throughout
• Low energy appliances
• Water saving devices include; low-flush WC 4.5/2L, low-run shower head 9L/min, 1000L rain water collection
• Airtight membrane fitted to bungalow ceiling with tapes to walls, windows and doors. Airtightness measured at 2.05m3/(h.m2)@50pa

Measures installed in detail:

  • Triple glazed wooden frame windows
  • External wall insulation
  • Loft insulation to 270mm
  • Polyurethane foam roof insulation
  • Mechanical Ventilation Heat Recovery
  • Condensing system boiler with weather compensating feed, TRVs on all radiators
  • 4m2 Solar Water Heating panels
  • Woodstove for secondary heating in living room
  • Low energy lighting throughout
  • Low energy appliances
  • Water saving devices include low-flush loo, low-run shower head, 1000L rain water collection
  • Airtight membrane fitted to bungalow ceiling with tapes to walls, windows and doors
Benefits of work carried out:

We moved into a 1950’s concrete-faced bungalow with Crytal single glazed windows a week before a really cold winter started 2009/10. The gas central heating couldn’t cope with keeping the bungalow warm. We have overcome this point, no struggling to keep warm anymore, keeping comfortable all year round in a very light environment. Our present dual utility Direct debit comes to £60/month, which now includes heating the detached apartment as well.

Favourite feature:

Marijke likes the sunshine showers she can take, provided by the solar panels and the bamboo flooring – a very sustainable material.
I enjoy the consistent environment and temperatures in the airtight and insulated building.

Project update:

We have added a timber framed utility room with 100mm Kingspan boards in walls and 150mm boards in the ceiling under a flat roof finished with a rubber/epdm liner.
Now that the boots and coats have been moved to the utility, I have also fitted bamboo flooring in the kitchen.

We have replaced the tarmac drive, which was deteriorating with better draining plastic mesh filled with gravel and grass on the lawn side. All the rain water from the down pipes of the house and garage that is not collected in water barrels runs into a soak away plus the rain on the new drive can soak through the gravel and grass, saving us water run-off charges by Severn Trent.

I have converted the detached garage into a self contained apartment/studio with en suite bathroom and kitchen corner. The walls are insulated with 75mm Kingspan boards internally and floors plus 125mm roof insulation. Heating is provided by a modern electrical radiator.

Updated on 04/12/2020

Business name:

Smart Energy Services

Business overview:

This business has developed out of Claus Best’s vision for better insulated and more comfortable homes with his long experience as a Carpenter and Retrofitter.

In August/September 2012 he attended a Domestic Energy Assessor and Green Deal advisor course. In early 2015 he took the Centre of Refurbishment Excellence (CoRE) diploma course as Retrofit Coordinator,

which he updated with a PAS2035 qualification in Sept. 2019.

Smart Energy Services provide the following services:

•    Retrofit advice

•    Retrofit project management

Retrofit installation services

Energy Performance Certificate (EPC)

MEES reports

The company is run by SuperHomer Claus Best of Hay Tor.

For more information see:

Common questions and answers for this SuperHome

Is mechanical ventilation with heat recovery noisy?+

I have installed an Itho MVHR system, which runs very quietly.  It
can only just about be heard, when lying in bed and everything else is

Prior to the installation I worried about fitting the MVHR unit in the attic
with possible vibration and noise as a consequence.   These problems
didn’t materialise, but the position enabled me to run all the ducting above
the ceiling in the bungalow with the inlet for fresh air and outlet for the
used air operating through vent tiles in the roof at 2m distance from each



Does the fresh air from the MVHR unit feel cold or draughty?+

When Hay Tor was photographed with a thermal imaging camera the outdoor temperature was 3C, we checked the freshly distributed air at 18C after going through the heat exchanger.

Since our roof is insulated below the rafters there was no need to insulate the
ducting in the attic, which would be necessary, if the insulation is located at
ceiling level.

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.