A cap is needed for prevention of anything entering the vent which should not.
Pros and cons of dryer vent thoguh roof.
A home s roof gets exposed to all the elements.
The problem i see with exausting the air through a soffit vent is that the natural flow is going to tend to pull that moist air right back in through the soffit vents and into the attic again.
When you have a new home built or you re replacing a roof then installing a ridge vent helps to balance out the transfer of hot and cold air.
Proper venting means no lint backup which can cause dryer fires.
Pros and cons of venting a dryer vent inside.
Position the outdoor vent opening at least 1 foot above the ground to allow for air circulation and to keep the vent clean.
They balance out the temperature of the home.
For a dryer in the basement run the duct upward then horizontally along the ceiling joist to the outdoors.
Lint stays attached to your clothing until it goes through the dryer.
With that the roofer commonly installs the dryer vent at the wrong penetration.
The lint eventually builds up.
The warm moist air inside the vent tends to condense on the colder walls of the pipe and the water droplets catch lint which also gets wet and sticks to the pipe.
If that won t work vent it through the nearest exterior wall.
When bath fans and clothes dryers vent through the roof they melt a bunch of snow.
I think the roof is a stupid spot to terminate clothes dryer vents because it s difficult to clean and it s a major contributor to ice dams.
I am basically just giving you the full scope of my experience with this method of money saving that i have been doing for the last couple of months.
So i am going to break dryer venting into some categories for you so that if you only want to know the pro s or con s or whatever you can skip ahead.
Clothes dryers should be vented through the side of the house preferably within reach from the ground.
Dryer vents are required to ensure proper venting for any dryer.
The natural flow of air in an attic is going to be pulling air in through the soffit vents and out through the roof vents ridge vent.
The less back pressure is created by the roof vent the more efficiently the system performs.
In new construction a roof vent hood generally referred to as a roof jack designed for the dryer looks almost identical to the one used to vent a bath fan.
The new dryerjack is the most efficient.
Avoid running the vent out through the roof.
When possible it s always best to vent outside in order to prevent potential.
Vents provided for the bath fan are smaller and feature a screen a major no no for dryer venting.