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And once installation was completed, we helped with witnessing commissioning, and then monitoring the functioning of the new building through its defects liability period..

Increased design cost and complexity: It requires specific detailing of the envelope, high quality of construction and specific performance testing in order to get the building certified..Increased capital cost: The additional construction capital cost can vary from 8% in the most optimistic scenarios (Passivhaus Construction Costs – October 2019) up to 25%..

Increased programme: Delivering a Passivhaus building can take longer.Quality control on site is extremely important, strategies for airtightness require careful sequencing and interim testing and workmanship skills need to be of the highest quality..Skill shortage and understanding.

There is a lack of large-scale builders who can deliver Passivhaus buildings.These projects can be seen as bespoke and are more expensive.. Bryden Wood’ response to Passivhaus’ challenges.

Bryden Wood is an industry leader in the adoption of Platforms-based Design for Manufacture and Assembly (P-DfMA) and has always shown a keen interest in the adoption of the newest and more advanced sustainability certification schemes, such as Passivhaus.. Our experience indicates that the standardisation process of P-DfMA, can be a suitable approach to counterbalance Passivhaus’ challenges described above, as follows:.

Reduced design cost and complexity:.It is generally accepted that we should be using less of the world’s natural resources.

By generating waste we are throwing away resources that are often only lightly, or sometimes never, used.By moving to a regenerative model of reusing products multiple times, we facilitate waste reduction by using fewer natural resources.

In addition, we support natural processes, use less water, increase biodiversity and replenish biological materials.This is one of the most powerful ways we can tackle climate change.. What is the circular economy in sustainable construction?.