Brought to you by
Brought to you by
The introduction of vacuum insulated panels (VIPs) represents an exciting development in the range of available insulation materials for buildings. Their relative slimness means that low U-values can be reached, even with very narrow wall constructions. This seems to be especially attractive for developers in locations where floor space is very expensive and must therefore be maximized, and also for retrofit schemes where the available space for the installation of insulation is limited.
On the other hand, the insulating properties of the panels are maintained only as long as the encapsulating membrane stays intact, which is difficult to guarantee over long periods of time, such as the typical building life cycle of 60 years. Failure can lead to low interior surface temperatures, which can, in turn, result in surface condensation and mould growth. In addition, the energy balance is disrupted, leading to a worse energy performance than design.
For these reasons, the Passive House Institute (PHI) recommends that this technology be used in a controlled manner, and only where standard, non-vacuum insulation materials cannot be installed or are not economical (under consideration of life cycle costs and shorter service life compared to standard insulation materials).
In cases where its use is unavoidable, the following recommendations are made:
Where a Passive House, EnerPHit, or PHI Low Energy Standard certification is targeted, the conditions listed above are mandatory, in addition to the following:
The Passive House Institute does not consider certification of construction systems that use VIPs as Passive House Components due to the reasons mentioned above.
For queries regarding building certification, please email us at email@example.com.