Cambridge Porotherm Project

Impressions of our Porotherm home
 Alijca & Chris Ginders, May 2022 


“It’s now almost 6 months since we moved into our home. Summer and Autumn temperatures have given me a chance to form some impressions of how the house performs in a range of conditions.


The overwhelming impression I felt in the first two months was ‘How cool’ it was; loving the design and the materials of construction, the fantastic quality and feel of the joinery, the organic nature of the interior walls, but also the literal ‘coolness’ of the interior during the very hot, humid summer we were experiencing. The best way to demonstrate this was to simply take one step inside from the North facing deck and out again; it was amazing to feel the difference in temperature with one simple step!


Needless to say, I spent a lot of time during the middle of most days enjoying the sunshine from inside the house without experiencing the unbearable humidity or extremes of temperature…

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… As the temperatures have started to drop it has taken us a while to notice that Autumn and the cooler months are approaching. Now it’s time for the house to keep us warm while the temperatures outside drop below 10 degrees most nights and mornings. The verdict? It’s working brilliantly. A few times already, I’ve stepped outside in the morning dressed far too lightly for the conditions outside! No need for winter PJs, winter weight bedding or thick jumpers and sweaters yet. We haven’t needed to use any heating.


It will be interesting to see how the house feels on cloudy, rainy days when there is little passive solar heating, but the lack of drapes or blinds in the main living areas is not affecting the way the house feels. I love the consistent temperatures inside.


The tilt function of the Internorm joinery and the electric celestory windows have also really helped with air circulation. The quality feel of all the joinery is amazing.


Visitors to the house have commented on the pleasant indoor temperatures and have been surprised at those interior/exterior differences. Our daughter couldn’t believe the contrast when she tried the ‘step in, step out’ trick a number of times when she first came in summer. A bit of a ‘Wow moment!’ This morning, our other daughter’s partner made the observation of how cold it was outside when we left the house just after 6.30am. “That’s a good testimony for the house’s construction” was his comment.


Simple conclusion: our new home is performing exactly as I hoped it would in a range of different conditions. I’ll update again toward the end of winter, but I’m quietly confident it won’t let us down!”


“I put a min max temp gauge in the house last night before I left. The temp was 11.3 degrees. When I came back on site this morning it was only 10.8 so the house had only lost 0.5 of a degree and the house is still wide open.
Chris Ginders, 2021
Cambridge Porotherm Project
Cambridge Porotherm Project
Cambridge Porotherm Project
Cambridge Porotherm Project
Cambridge Porotherm Project
Cambridge Porotherm Project
Cambridge Porotherm Project
Cambridge Porotherm Project
Cambridge Porotherm Project
Cambridge Porotherm Project
Cambridge Porotherm Project - November 2020
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Cambridge Porotherm Project - November 2020
Cambridge Porotherm Project - November 2020
Cambridge Porotherm Project - November 2020
Cambridge Porotherm Project - October2020
Cambridge Porotherm Project
Cambridge Porotherm Project
Cambridge Porotherm Project