This is one of the most common mistakes we see from people who are not experienced with air ducts.
Is my dryer vent on the roof.
It should go out through a wall or the eve of a roof.
In my humble opinion dryer vent terminals should be accessible from the ground if you already have a home with a dryer that terminates at the roof be sure to have the terminal cleaned on a regular basis and consider having the terminal replaced with a dryerjack terminal.
Trust me you don t want to do that.
Get the extra clearance model 486.
If you can access the vent from a ladder safely detach the vent cover by unscrewing it and using your knife to remove the caulk.
You might find that there are gobs of lint stuck on in.
Most people don t have such a ladder.
Considering that back pressure higher than 6 wci is generally recognized as inefficient you can see that venting through the roof with non dryer specific vents is immediately problematic.
It should have a cap on the end with a flapper so that animals cannot get in.
No a dryer should not be vented through the roof.
Dryer vent specialists will tell you that a vertical approach to installing a dryer vent is inefficient and creates a fire risk for a home if it goes unchecked.
To access it from the front a ladder would have to have been placed on the metal front porch roof.
You can remove some of this with your hands.
If it is on your roof this can be a tricky step.
If you can remove it.
In fact if it is not easily accessible you are probably better off simply hiring a professional.
It is not advisable to vent a dryer through the roof.
Remove the guard to the dryer vent on the roof.
When you get on the roof you should find that the vent is covered by a guard.
The new dryerjack is the most efficient.
The less back pressure is created by the roof vent the more efficiently the system performs.