I was new to the concept of Passivhaus houses but after much research I decided that it made sense or our new home to be built to this high standard of energy efficiency. We chose Touchwood homes, who  explained to us that their robust rigid external air-tight layer system, unlike  traditional sticky tape membrane systems, would not only guaranteee a passivhause degree of air-tighness but would also, for the slight increase in initial costing, save me a fortune on the cost of follow-on trades who would have otherwise have to work around flimsy internal membranes. As a result I have seen for myself how quickly and efficiently the plumbers and electritians have been able to complete their work and how much time and money this has saved me already!
Paul, Hennerwood Passivhaus

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