Vermiculite insulation testing

[Charles R. N. Crooker]

Originally Posted by rwand1

That would not be very likely due to the chimney effect. Air is pulled up through the house not down through the house.

So you are saying the the living area would never get any air from the attic, what would happen with reall strong winds blowing air into the soffit vent and the kitchen fan only goes into the attic area and the dust in the attic is being moved by the air coming into it,

[rwand1]

Well good question.

Exhaust fans should not vent directly into attics, if they are they should be repaired so as to exhaust outside.

If the fan exhaust is ducted correctly how would wind blow back down. Air in the house is sucked out through the roof.

Just as air is pulled up through the baseboards, electrical boxes (wall/ceiling), plumbing stacks?

[Charles R. N. Crooker]

Originally Posted by rwand1

Well good question.

Exhaust fans should not vent directly into attics, if they are they should be repaired so as to exhaust outside.

If the fan exhaust is ducted correctly how would wind blow back down. Air in the house is sucked out through the roof.

Just as air is pulled up through the baseboards, electrical boxes (wall/ceiling), plumbing stacks?

Well for the most part, the homes that do have vermiculite in the attic's are also of the age that they did not vent the fans outside the attic, washroom fans have been installed and no venting at all, same as kitchen's, also no roof vents to let out the attic air out through the roof, I have seen a good number of homes with vermiculite in them and for most of them they have not been upgraded to extending the air vents with insultated flex pipe or any piping! So to do the repairs they have to go into the attic area with all of the vermiculite, NOT a good idea. Then you must hope that no one in the last 40 years or so has done any remodeling of the ceilings, inculding ceiling fans, drywalling, damage from a leak in the roof, etc. Do you see what I mean yet?

[tflaro]

Sorry guys,
I didn't ask for a debate on this topic. I was asking for help on finding a lab that will test for asbestos. That was all
Todd

[gmacdonald]

charles
good job on the explanation on vermiculite.
it should always be reported with supporting info,
so the next poor soul knows not to go up there!!