Roof vent for gas dryer

[Qwerty1234]

As part of building a new deck/porch extension to my house, my builder is moving the existing vent of a gas dryer. It previously vented to the side of the house and will now vent through the roof of an outdoor porch.
The vent pipe extends about 3 ft horizontally through the new porch roof (unheated area) and then exits above the roof.
I'm not 100% sure about what he did.

Does this type of work have to be done by a licensed plumber?
Does it have to be inspected by the town inspector (which department)?
Will this cause issues with snow in the winter?

I live on Massachusetts.

Thanks!

 

[Qwerty1234]

As part of building a new deck/porch extension to my house, my builder is moving the existing vent of a gas dryer. It previously vented to the side of the house and will now vent through the roof of an outdoor porch.
The vent pipe extends about 3 ft horizontally through the new porch roof (unheated area) and then exits above the roof.
I'm not 100% sure about what he did.

Does this type of work have to be done by a licensed plumber?
Does it have to be inspected by the town inspector (which department)?
Will this cause issues with snow in the winter?

I live on Massachusetts.

Thanks!

Photo of the new installation: https://photos.app.goo.gl/BVgVH3YnnC5SBM196

 

[TheCommish]

As a MA building official we would inspect it on the rough frame of the building it would be included in the permit to do the remodeling.

Other officials would say a sheet metal mechanic need to do the work and pull its own separate sheet metal permit.

 

[BN4537]

If you can locate the manufacturer's instructions for the dryer in question, it may have some details on how to terminate a vent above a roof. I would definitely be concerned about snow blocking the exhaust. The exhaust would melt the snow, but how long would the vent be blocked by the snow before it melts? Those fumes have to go somewhere.

 

[SCBO1]

Q1234, Technically the roof vent termination cap flashing should be tucked under the upper layer of shingles however the install in the photo is the norm now. Very seldom do I see the flashing at the top under the shingle on a remodel. Its appears to be covered with enough roof cement, I'd check it in few years for cracks in the roof cement.

Roof vent intalled horizontally should have 1/4 per foot minimum rise.

 

[bill1952]

I'm with pcinspector, definitely not impressive workmanship. Pooky is never the good answer to keeping water out.

 

[ICE]

I doubt that this will be approved in snow country. I have seen several and the lint collects on the roof.

 

[my250r11]

Well we would check it but if not correct may ask for a mech. contractor & permit. The person that install yours was not a roofer for sure. Would fail due to the flashing is not installed in shingle fashion.(top tucked under). Or not to manu. specs. which ever you prefer to write on the correction.

 

[Robert]

It sounds like you are extending the duct. Don't forget 14' max duct length otherwise a booster fan required.

 

[redeyedfly]

It sounds like you are extending the duct. Don't forget 14' max duct length otherwise a booster fan required.

???
Most dryers have a much longer throw than 14’. IMC is 35’ OR manufacturer’s instructions which are typically around 65’ to 120’ for long throw models.

 

[Inspector Gift]

Did the inspector verify the screen was removed from the vent termination? I have found too many dryer vents that had screens in them. The ones on the roof are next to impossible to check since we do not climb on roofs without Fall Protection.

 

[klarenbeek]

That cap does not look like its approved for use with a dryer. Too low profile for a dryer. The roof caps approved for dryers are a little taller so they don't lose any volume and don't come with screens at all. This one looks alot like a Broan model 636 which specifically says "not for use with dryer exhaust" right on the box.
Also make sure the duct going through the attic is insulated with a duct wrap with vapor barrier. If not, you will end up with condensation problems, causing excessive lint buildup in the duct, more than normal.

 

[Robert]

???
Most dryers have a much longer throw than 14’. IMC is 35’ OR manufacturer’s instructions which are typically around 65’ to 120’ for long throw models.

sorry. I was quoting a CA requirement....camc section 504.4.2.1

 

[steveray]

And guessing that does not have a damper...

on the outside of the building. Exhaust duct terminations shall
be in accordance with the dryer manufacturer’s installation
instructions. If the manufacturer’s instructions do not specify
a termination location, the exhaust duct shall terminate not
less than 3 feet (914 mm) in any direction from openings into
buildings. Exhaust duct terminations shall be equipped with a
backdraft damper.