Insulation, Passive House, Energy Efficiency, Halifax, Nova Scotia, Sawlor Built Homes

Passive House Project: Insulation

Posted by Keith Sawlor on 11 July 2017 | 0 Comments

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Our passive house has been insulated!

We have Roxul insulation on 1 level and R-24 fiberglass on the next level, all insulated on the inside of the air/vapor barrier, between the 2x6 wall framing.

(wall cavity before insulation)

(wall cavity filled with insulation)

We also have 9 ½” of blown in cellulose that fills the outside wall section of the home. With an R-value of +/- R-60 and air seal of under .6ach, this home will be very comfortable and efficient!

It is important when installing blown in cellulose that its density is calculated correctly. The R-value is related to the density of its blown in products, so correct insulation is critical. The R-value/density can be confirmed by taking a core sample of its products and then weighing it. This simple quality control check will ensure our homeowners will enjoy years of comfort in their super energy efficient home.

(measuring the density of blown in cellulose)

A passive house requires multiple blower door air tests to ensure the air tightness is maintained throughout the entire construction process. Our first air test result was .59 ACH @ 50 pascal**, which is within the passive house required air tightness.

After insulating the house (but prior to drywall installation) our second blower door test was conducted, with a result of .37 @ 50 pascal. This is an incredible result that will significantly improve the energy performance (and comfort) of this home!

Congratulations to all of our team that help achieve these results!

**Pascal (Pa): a unit of measure used to determine the pressure difference between the inside and the outside of the building envelope.


Keith Sawlor
Keith Sawlor is the owner of Sawlor Built Homes and has over 30 years experience in Custom Home Building. Keith is a Certified Residential Builder and industry leader in energy efficient R-2000 homes.

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