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Old 10-04-2013, 10:55 AM   #1
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use Tyvek/Typar inside of the house (insulation cover)


Hi all,
I locate in Ontario, Canada
My furnace locates in the unfinished basement, no intention to finish it. Living room with tv above the furnace and water heater on the first floor.
Thinking of install Roxul safe and sound insulation in the basement ceiling to cut down noise.
My question is: could i use Tyvek/Typar house wrap to cover/support the insulation? Prevent fiber fall down to basement floor.
Your opinion is much appreciated.
Thanks in advance
Quincy.

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Old 10-04-2013, 06:51 PM   #2
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use Tyvek/Typar inside of the house (insulation cover)


Quincy--I'm not sure if that is safe or good practice----we have several members with good knowledge of insulation---I am going to add to your title to attract their attention---Mike----

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Old 10-05-2013, 06:07 AM   #3
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use Tyvek/Typar inside of the house (insulation cover)


Hi Mike,
Appreciated for the add to the title.
What do you have in mind in term of "safe" and "good practice"?

Quincy
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Old 10-05-2013, 08:52 AM   #4
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use Tyvek/Typar inside of the house (insulation cover)


just how heated is the basement ?

mine is not directly heated = no vents. but it does not get colder than upper 40's down there.
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Old 10-05-2013, 09:34 AM   #5
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use Tyvek/Typar inside of the house (insulation cover)


Quote:
Originally Posted by quincy View Post
Hi all,
I locate in Ontario, Canada
My furnace locates in the unfinished basement, no intention to finish it. Living room with tv above the furnace and water heater on the first floor.
Thinking of install Roxul safe and sound insulation in the basement ceiling to cut down noise.
My question is: could i use Tyvek/Typar house wrap to cover/support the insulation? Prevent fiber fall down to basement floor.
Your opinion is much appreciated.
Thanks in advance
Quincy.
What noise is it you're seeking to reduce?

Because if it's just voice the sound insulation will help. But if you're looking to reduce lower frequency noises like people walking or the bass from music then you'll need more than just insulation. Noise like that travels through the building materials. To stop them you need to decouple the layers between the floors. This is most commonly done by using decoupling materials like clips or sound-absorbing glues.
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Old 10-05-2013, 11:32 AM   #6
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use Tyvek/Typar inside of the house (insulation cover)


Quote:
Originally Posted by quincy View Post
Hi all,
I locate in Ontario, Canada
My furnace locates in the unfinished basement, no intention to finish it. Living room with tv above the furnace and water heater on the first floor.
Thinking of install Roxul safe and sound insulation in the basement ceiling to cut down noise.
My question is: could i use Tyvek/Typar house wrap to cover/support the insulation? Prevent fiber fall down to basement floor.
Your opinion is much appreciated.
Thanks in advance
Quincy.
That has to be against code, although don't ask me the details of that...gas or oil furnace+plastic membrane = IMO a no-no
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Old 10-05-2013, 11:47 AM   #7
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use Tyvek/Typar inside of the house (insulation cover)


According to Roxul's website you should not use a moisture barrier under it. They mention other techniques:
Quote:
Install ComfortBatt™ insulation to fit snugly between floor and underside of floor joists. Hold batts in place using any of:
  • Wire mesh
  • Strapping
  • Criss-crossed wire or string
  • Weather grade sheeting
  • Air barrier sheet membrane
  • Do not apply vapor barrier/retarder on underside of insulation as it has the potential to trap moisture.
Now, tyvek generally isn't really a moisture barrier, per se.
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Old 10-05-2013, 06:29 PM   #8
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use Tyvek/Typar inside of the house (insulation cover)


Tyvek is 58 perms open, far from a moisture barrier/retarder. It lets water vapor through, but not air- if sealed at laps, etc. Did you air seal all wiring/plumbing holes in the floor decking- under tub, etc.? I have suggested housewrap in attics and crawls when no flame producing HVAC is present (for 3 years here), as ccarlisle correctly pointed out.

Gary
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Old 10-05-2013, 06:48 PM   #9
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use Tyvek/Typar inside of the house (insulation cover)


Hi all,
Thanks for the replies so far.
The noise I try to reduce is sound noise of the furnace and water heater.
The basement temperature, would say around 60*F - 65*F.
The purpose of using Tyvek/Typar is to hold the insulation in place and keep the insulation fiber from falling down, Tyvek/Typar will be staple to the bottom of the joints, will have about 1" gap to the main duct and about 6" gap to the furnace main trunk.
So, what do you think, yay or nay?
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Old 10-05-2013, 06:59 PM   #10
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use Tyvek/Typar inside of the house (insulation cover)


Just use the batt insulation with the kraft paper front and staple it to the joists.
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Old 10-05-2013, 07:43 PM   #11
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use Tyvek/Typar inside of the house (insulation cover)


Quote:
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Just use the batt insulation with the kraft paper front and staple it to the joists.
Roxul safe & sound doesn't come with kraft paper, I don't think.
So, kraft paper need to purchase then.

Reason I mention Tyvek/Typar, I have a roll of Typar.
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Old 10-06-2013, 11:46 AM   #12
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use Tyvek/Typar inside of the house (insulation cover)


Check locally with AHJ, I really doubt you can be fire-safe leaving asphalt craft paper (vapor retarder) or housewrap (vapor open) exposed in a space with combustion source. The paper facing would be on the wrong side of ceiling anyway... in Canada.

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Last edited by Gary in WA; 10-06-2013 at 11:49 AM.
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Old 10-06-2013, 02:26 PM   #13
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use Tyvek/Typar inside of the house (insulation cover)


Been a good discussion, thank-you all.
We are going to live with the noise for now, some day, will install the insulation and cover with dry wall, I guess it is the best way.
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Old 10-06-2013, 06:11 PM   #14
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use Tyvek/Typar inside of the house (insulation cover)


But is the unit really that loud? Or is more of the noise coming from the air ducts? Because if it's an airflow noise then the joist insulation isn't likely to make a lot of difference. But if it's the blower motor itself it might help. If you've got radiator heat and it's noise from a circulator pump then you'd want to find better ways to isolate that instead of insulation.
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Old 10-07-2013, 09:27 AM   #15
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use Tyvek/Typar inside of the house (insulation cover)


Hi wkearney99,

Noise of both, air flow and blower motor noises, seeking reduce voice type noise.

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