Helpful? 0

Blower door test cost

Not including the cost of the blower door test itself, I am looking for a ROM materials and labor cost per ft-2 to seal up a conventional 2 x 4 framed house, sheathed, sided, windows, doors, stud bays, lid, etc.....?

If someone that has done it can estimate labor hours to get to 5-7 ACH-@ 50 I can factor my local labor rate. Please include the trail and errors, IR and smoke back and forth, etc. Or if you sealed up some ft-2 home let me know how long it took...

Thanks!

Asked by Terry Lee
Posted Wed, 08/20/2014 - 12:07
Edited Wed, 08/20/2014 - 12:51

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5 Answers

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1.
Helpful? -1

2000sqft home 20--40 hours would get air sealing below 3 ACH.
Materials $500 t0 thousands from low tech to PH supplies.

Example of simple; caulk plates, boot penetrations, tape Zip sheathing, no chimneys.

Answered by aj builder, Upstate NY Zone 6a
Posted Wed, 08/20/2014 - 12:18
Edited Wed, 08/20/2014 - 23:16.

2.
Helpful? 2

Terry,
Don't confuse blower door testing with air sealing.

It's possible to combine the two functions, of course, using a method called blower-door-directed air sealing. But you really shouldn't wait for the end of the project to tackle air sealing.

Air sealing needs to happen at every step of the construction process, and needs to be performed by the framers, window installers, plumbers, electricians, and sometimes the roofers and the drywall crew. If you have to begin thinking about air sealing at the end of the job, it's too late.

Ideally, the blower door test just confirms that you have already done a good job.

Answered by Martin Holladay, GBA Advisor
Posted Wed, 08/20/2014 - 12:48

3.
Helpful? 0

Perhaps I need to clarify. We all read about how monolithic walls and perhaps roof designs such as concrete produce better air sealing simple because of the bond the binder such as high strength portland cement creates to just about anything it comes in contact with especially sharp aggregate, although sealing would still be an effort at penetrations. Compared to stick builds, or layering, with many gaps to seal with sealants that are not as robust as Martin points out may need several iterations of pressurized air sealing, seek and destroy gaps that can get tricky and time consuming in determining what gaps are worth sealing. That is where an experienced crew comes in and pays for themselves. What I am trying to determine is a knock down factor to the cost of blower door test sealing for the monolithic designs. I just have no idea what the baseline is the knock down factor is? Hope that makes sense.

AJ sounds reasonable, 20 hours on average, $500 in material baseline?

Answered by Terry Lee
Posted Wed, 08/20/2014 - 15:42
Edited Thu, 08/21/2014 - 06:18.

4.
Helpful? 0

Are you asking for new or existing buildings??

Answered by Jin Kazama
Posted Thu, 08/21/2014 - 13:51

5.
Helpful? 0

new, opps forgot to mention.

Answered by Terry Lee
Posted Fri, 08/22/2014 - 08:52

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