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handy man88 06-08-2010 09:22 PM

Attic Fan
 
Does anyone know whether the humidistat option is worth it?

Ed the Roofer 06-08-2010 09:31 PM

Yes it is, especially if you live in a humid climate.

This way, the PAV will operate not only from excessive internal heat, but for the RH content as well.

Ed

handy man88 06-08-2010 09:35 PM

Quote:

Originally Posted by Ed the Roofer (Post 453320)
Yes it is, especially if you live in a humid climate.

This way, the PAV will operate not only from excessive internal heat, but for the RH content as well.

Ed

Interesting though....if you live in a humid environment, you're also drawing humid air into your attic.....whereas with attic air (thermostat), you're generally pulling air from the outside that's cooler than air in your attic.

The way PAV's are marketed though, the humidistat option is used during cold weather where humid air inside the house can get into the attic and freeze up....generally speaking, during winter, the air is dry outside.

handy man88 06-08-2010 09:38 PM

Quote:

Originally Posted by Ed the Roofer (Post 453320)
Yes it is, especially if you live in a humid climate.

This way, the PAV will operate not only from excessive internal heat, but for the RH content as well.

Ed

Since you're a roofer, do you use weather shield for all penetrations through the roof even if the device comes with its own flashing (e.g. pipe collars, dryer vents, static vents, etc.)?

Roofmaster417 06-08-2010 11:24 PM

We do.,It has been a really great habit that we have been doing for about 6 yrs.,Does it work? it helps to maximize your roof in that area.,however if these components are not installed properly to begin with all moisture guard does is puts a band-aid on a cut. Moisture guard is actually for any area of the roof that has a better chance of ice daming,leaking at pitch brakes,low slopes etc.We use Weather Guard around the perimeter of chimneys,skylights,we use it along gutter and rakelines,and we use it in valleys,pitch breaks,under vents,pipe flashing.It is some good stuff since it seals around the fastener.

Ed the Roofer 06-09-2010 12:13 AM

Quote:

Originally Posted by handy man88 (Post 453323)
Since you're a roofer, do you use weather shield for all penetrations through the roof even if the device comes with its own flashing (e.g. pipe collars, dryer vents, static vents, etc.)?

As a matter of fact, I do. It seems as if roofmaster already mentioned most of the areas where we install it also, as an added precaution, but we also apply the Ice and Water Shield where there will be penetrations securing something to the roof as well, such as the lag bolt screws from anj old TV antennae too, or satellite dish mounting brackets.

Ed


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