Passive Airtightness & MVHR V Building regulations We decided it would be interesting to see a cost comparison of a typical house designed to meet current building regulations and a house designed to achieve passive house levels of Airtightness including MVHR. The results were surprising and had the potential to save $20,000 over the life of the mortgage $643/year = Cost of air leakage at 7/m3/m2/h - N 50 of...

Elevated CO2 levels impair decision making ability Outdoor CO2 levels range between 350 and 400ppm (parts per million), however indoors CO2 levels can increase to unhealthy levels of over 2500ppm without proper ventilation. Generally it is accepted that the level of 1000ppm is toward the upward limit of the acceptable level of CO2 we should be exposed to in our work and living environment. Feeling fatigued and dizziness are common...

Thermal bridging plays a significant role in heat loss in our buildings today in both commercial and residential buildings. Of area that causes regular issues is at door thresholds where a structural insulant is required. Window and door reveals, Wall plate details, steel posts and the where the exterior wall meets the foundations are the other difficult junctions. COMPACFOAM system drawings [caption id="attachment_662" align="alignright" width="300"] Thermally broken foundation[/caption] U Values...

Interstitial condensation : - Can all flat roofs be treated in the same way ? It's a question we get asked quiet often - is there a rule that I can apply in general terms too all flat roofs? Unfortunately there isn't due to the mix of factors that affect moisture. This is an area we specialise in and can provide a market leading system warrantied flat roof constructions. Read...