How not to install an MVHR!

Posted Wednesday March 28, 2018 by Eric Fewster

Just been to a client who had an MVHR installed 6 years...

Just been to a client who had an MVHR installed 6 years ago, but they were never told about the need to change the filters! More details about how not...

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MVHR with clogged filters

Actual energy usage within 10% of PHPP model prediction

Posted Friday March 02, 2018 by Eric Fewster

During 2017, I had wanted to test the robustness of the Passive...

During 2017, I had wanted to test the robustness of the Passive House modelling software on my own house. From January until December, I set the thermostat to 20 degrees...

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PHPP vs actual 2017

Blowing cellulose as part of internal insulation on a Passivhaus retrofit project

Posted Thursday September 07, 2017 by Eric Fewster

Currently blowing cellulose into wall cassettes fronted by wood fibre, as part...

Currently blowing cellulose into wall cassettes fronted by wood fibre, as part of Passivhaus level retrofit of two Victorian houses in Manchester. Has been an interesting, if not somewhat laborious...

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Blown cellulose insulation behind wood fibre

The importance of thermal bridge modelling

Posted Wednesday June 14, 2017 by Eric Fewster

The lower energy you go with a retrofit, the more the junctions...

The lower energy you go with a retrofit, the more the junctions matter! You can find some explanation about thermal bridges and modelling them here....

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Reveal insulation

Airtightness of ceilings in upper floors of old houses

Posted Thursday June 08, 2017 by Eric Fewster

Making the ceiling of the upper floor airtight can be a challenge....

Making the ceiling of the upper floor airtight can be a challenge. Get some tips on how to attach a membrane on the inside of the existing ceiling here....

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Airtightness membrane on ceiling

Google Plus – retrofit photos platform

Posted Thursday June 01, 2017 by Eric Fewster

Here’s where I’ll be posting retrofit photos & advice: Google Plus....

Here’s where I’ll be posting retrofit photos & advice: Google Plus....

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Google Plus

We’ll be talking retrofit in the Carbon Coop caravan at Energise on Saturday

Posted Friday March 31, 2017 by Eric Fewster

ColdProof will be manning the retrofit caravan for an hour on Saturday...

ColdProof will be manning the retrofit caravan for an hour on Saturday (starting 13.30) as part of the Energise festival (http://www.energise-mcr.info/#energise). I’ll also be doing an open day at Hersey...

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Energise low energy festival, Manchester

Suspended floor timbers still drying out well

Posted Friday March 31, 2017 by Eric Fewster

It’s good to see that the WME (wood moisture equivalent) is now...

It’s good to see that the WME (wood moisture equivalent) is now below 20% for all joists except one, indicated by the red line. This is the only sensor in...

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Wood moisture content of suspended timber floor joists in Hersey Street retrofit

Space heating reduced by 68% in Chorley retrofit plan

Posted Monday August 08, 2016 by Eric Fewster

Space heating demand by 68% as part of a retrofit plan made...

Space heating demand by 68% as part of a retrofit plan made for a detached house in Chorley (reduced from 198 to 63 kWh/m2/yr). We have completed the energy analysis...

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Retrofit plan using PHPP

Suspended floor joist moisture update – August 2016

Posted Tuesday August 02, 2016 by Eric Fewster

WME (wood moisture equivalent) has been hovering both above and below 20%...

WME (wood moisture equivalent) has been hovering both above and below 20% in a few joists during the past few months, while other joists seem to be doing better. The...

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Wood moisture content of suspended timber floor joists in Hersey Street retrofit