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From my personal experience as a house inspector, I would say roughly 25 per cent of all dryer vents run to the roof. Most of these dryers are on the second or third level of the property. There isn’t anything better or worse about dryer vents to the roof, although they tend to be tougher to clean.

It may be possible to clean the dryer vent from just the inside (without getting on the roof), but there may be a problem with the roof cover that you can’t determine from the interior. In addition, you may not be able to reach the very top of the vent from the inside due to a lint blockage, birds nest, the length of the duct, and other concerns.
If you have any worries, getting the dryer vent cleaned by a professional is recommended.

Step 1. Remove Flex Vent

Many people look for how to do dryer vent cleaning from the roof. The first step in cleaning your dryer vent is to draw back the dryer and remove the flex vent. The flex vent is the short vent tube that extends from the back of the dryer to the wall. It’s necessary to clean your flex vent if it’s dirty additionally. You want to inspect it for highly flammable lint, debris, holes, and other concerns. You also want to make sure it wasn’t crushed beneath the dryer – restricting air movement. There is usually a metal clamp on each end that needs to be released with a screwdriver for removal. There may also be some aluminum foil tape that needs to be removed.

Step 2. Clean Wall Vent From Inside

The second step is to clean the wall from the inside with a dryer vent cleaning tool. The dryer vent cleaning tool comprises several interconnected plastic rods, each with a nylon brush attachment at the end. Connect this tool to a cordless (or corded) drill and put it into the dryer duct. With the dryer vent cleaning tool, work your way up the vent, scrubbing the vent’s walls to dislodge the lint. Ascend as high as possible with the device, and remember that you may need to ascend and descend several times. When the dryer vent cleaning tool reaches the roof, you’ll hear and feel a thud. This sudden halt occurs due to the dryer vent cleaning colliding with the roof cover. You can look for a dryer vent cleaning in Houston.

Rod Disconnection Risk

One major issue with home dryer vent cleaners is their construction of interlocking plastic rods. Unfortunately, if you actively clean the vent, the rods may detach from one another, leaving you with the tool stuck inside the duct.
I propose using duct tape to limit this risk further to secure the rod connections.
Because professional typically employs pressurized air equipment or steel cables, this is rarely an issue.

Step 3: Clean the Lint From the Vent

Most lint falls to the bottom when the dryer vent reaches the roof. When removing the dryer vent cleaning tool from the vent, the lint should have clumped together at the duct’s bottom. You should be able to reach in with your hand and remove several handfuls of lint. After removing the lint, I recommend continuing the cleaning and lint removal process until no more lint falls.

Step 4: Incorporate the Leaf Blower

This step is optional, but I recommend inserting it into the vent following cleaning to blow out any remaining lint if you have a leaf blower. Additionally, it will assist in dislodging any lint adhered to the roof cover (such as the flapper).

Step 5: Remove the wall vent from the roof

This fifth step is likewise optional, but if possible, climbing to the roof to clean the dryer vent is a good idea. However, if your roof is steep or tall, or if you are not comfortable climbing upon it, please do not do it. Locate a qualified contractor who is capable of safely ascending to the top.

While on the roof, you can wipe any dirt from the roof cover and check that the flapper is functioning correctly.
While on the roof, you can also insert the dryer vent cleaning tool, taking care to reach the dryer vent’s upper half. The lint that has been cleaned should fall back down the flue, where you can easily remove it with your hand.

Step 6: Check Air Flow

While on the roof, I strongly recommend that someone connects and turns on the dryer (or utilizes a leaf blower) to ensure adequate airflow. If the airflow is extremely weak or nonexistent, this indicates that a clog still blocks the vent. Additionally, there could be a duct disconnect, which is easier to confirm by inspecting the duct in the attic.