Longmont Roofing: Article About Types Of Underlayment
When property owners are confronted with the task of replacing or installing a new roof, the cost and style of the roofing finish material is likely their top priority. However, a roof is a system of parts that work together to maintain the integrity of the roofing structure and to protect the home from the elements, so it is important to consider the quality and cost of the other parts of the roofing system as well.
Aside from the actual roofing finish, the underlayment is the next largest purchase and choice to make. Underlayment provides protection for both the roofing material and the decking. There are different types available, and the choice depends on the weather conditions, the pitch of the roof and the type of roofing product that is used. Talking with an experienced Longmont roofing professional can help property owners make the best selection to fit their needs.
There are two basic types of underlayment: felt and synthetic. Felt underlayment is also called tarpaper and is made by saturating paper with asphalt in order to create a moisture resistant finish. Felt is available in 15 and 30 pound blocks. The 30 pound weight is heavier and more water resistant but is also more difficult to install. Felt has been used as the primary roofing underlayment for many years and does the job satisfactorily; however, synthetic products typically provide superior protection.
The roofing contractor experts at Colorado Roof Toppers of Longmont CO can assist you with questions about commercial roofing or flashing.
In areas where severe weather is common, it may be more beneficial to go with a synthetic product. Along with superior moisture resistance, synthetics are much lighter in weight and easier to install. Like felt, they provide protection from the chemicals in asphalt shingles, and they act as a vapor barrier. The advantage to a synthetic product is that it is breathable and allows hot air to escape while maintaining the moisture barrier. Synthetics last much longer than felt, so they are a better choice for metal and other roofs that are expected to last 50 years or more.
All roofing products, with the exception of slate, require underlayment. Though slate needs no underlayment at all to function effectively, if the project is expected to take several days, one is often used to protect the decking while it is being placed. However, it is not necessary to use a high dollar material for the brief amount of time the decking would be exposed. A qualified contractor should be happy to explain the benefits of each type of underlayment for the proposed project based on the weather conditions and the projected budget.