A layer of roof underlayment should be installed between the sheathing and decking layers of a roof to protect the layers below from moisture seepage. Roofing felt is a material that is commonly chosen for this underlayment.
While the quality of the material used in roof underlayment is important, the quality of the installation work itself is probably the most important consideration in ensuring a sound roof and preventing leaks.
The following are four mistakes that should be avoided in installing roof underlayment:
Using felt underlayment in extremely moist climates
When it comes to roof underlayment, the two major material choices are synthetic and felt. Felt is a popular choice because it is generally the most cost-effective material.
However, it might be worth investing in more expensive synthetic underlayment in buildings that will be exposed to heavy precipitation. Synthetic underlayment is more effective when it comes to keeping water from seeping down into the roof and causing leaks.
Walking excessively on felt underlayment
Felt underlayment is known for being particularly slippery to walk on. This is because it is made up of asphalt and petroleum portions that give the material a slippery quality. Minimize accident risks during the installation of felt underlayment by walking on the underlayment material as little as possible once it has been tacked down onto the roof.
Putting flashing down in the wrong order
When it comes to keeping a roof impervious to water, flashing is one of the most important things to remember. Drip-edge flashing needs to be nailed down right before underlayment is put on the roof. Flashing can be bent down over the roof to channel water away.
While flashing is put down before felt underlayment on most parts of a roof, there is one important exception. Flashing should be put down after felt underlayment on angled gable ends of a roof. This is done so that the metal edge isn't able to lift up the felt underlayment when it's pushed up by wind.
Not starting the job at the bottom corner
The best place to start a felt underlayment installation job is at one of the bottom corners of the roof. This makes tacking the underlayment material down easiest.
The underlayment material should be tacked down in the corner first so that the end of the underlayment material is flush with both the side and bottom edges of the roof. Underlayment can be tacked down with a variety of different types of fastener, but staples and roofing nails are most commonly used.
For more information, contact a company like Harrington & Company.
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