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Thomas van Raamsdonk
Thomas van Raamsdonk
on Airtightness and Moisture Management
General Manager

Thomas is the General Manager of Pro Clima NZ. He has extensive knowledge on airtightness, thermal bridging and healthy homes, and is dedicated to improving the building standards in Oceania to create a long-term solution that ensures healthy living for everyone.

21 October 2019

‘Airtight’ vs ‘Breathable: What's it all about?

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This month we look at 'airtight' vs 'breathable' building. Is it possible to achieve both within the same build? 

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21 March 2019

Designing for Steam in Modern Buildings


We pipe water inside buildings, so what happens when we turn it into steam?

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21 February 2019

Fire Testing for Temporary Wall Cladding

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A look at how a peel and stick weathertightness membrane performs in a fire when used as a temporary cladding.

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18 October 2018

Renovating and Insulating Masonry Walls

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Why strapping and lining masonry walls on the inside is not a good idea, not for renovation, not for new builds. 

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21 September 2018

Adding Insulation and Wall Underlay to Existing Walls

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How can we safely add insulation to existing walls without risking trapped moisture and compromising durability? 

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22 August 2018

Renovation Opportunity and R-Values

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In this article, I’m tackling real-estate adverts, renovation by paint, and discussing one area of cost for whole-house renovation and the connection between health and wealth.

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19 July 2018

Achieving Winter Warmth in New Zealand Homes

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Common themes with comfortable high performance houses are insulation, airtightness, ventilation and heating. 

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21 June 2018

Water Resistant vs. Watertight

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Protecting structure from moisture before, during and after construction is a code minimum requirement of B2 durability.

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16 May 2018

Risk versus Reward in Building Design

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How do I get my design to meet expectations of comfort?

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18 April 2018

Where Does the Airtightness Layer Go?

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Getting layering right in New Zealand buildings for summer and winter.

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