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Weather tightness rating?

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Posted by: from Windsor
5/15/2019 at 1:19:34 PM

How can I find out the weather tightness rating for my new home? How do I know if it met the standards outlined for new homes in southern Ontario.

Looking for a fast response please!

REPLIES (3)
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Date/Time5/15/2019 at 3:27:07 PM

You need to call a company that specialize in weathertightness.

They have equipment to run the test in your home.

Google Weathertightness companies

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Cyndi in Windsor
Date/Time5/15/2019 at 5:34:09 PM

Thanks Paul, I can google that. One would think that if building standards required a certain standard that the rating would be recorded somewhere for the buyer to see.

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Date/Time5/20/2019 at 1:55:15 PM

In Vancouver, we are required to do an Energy Audit that determines the ACH (air exchanges per hour) performance of a home proposed for renovation.

The change in ACH is determined by a professional performing a negative air test (blower door) at the home at the beginning an the end of a renovation.

Ideally, ACH would be in the range of 3.0-3.5 air exchanges per hour (if not lower). Older homes here in Vancouver can often test in the 15-20 ACH range.

I've just briefly looked at some studies covering ACH in southern Ontario and it seems like the 3.0 ACH is considered to be very good weather tightness.

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