Tar paper, also known as roofing felt or roofing underlayment, is a widely used material in the construction industry. It is primarily used as a protective layer between the roof and the shingles or other roofing materials. Its main purpose is to provide an additional barrier against water infiltration, but concerns have been raised about whether tar paper can actually trap moisture and lead to wood rot. In this article, we will delve deeper into this topic and explore the potential risks associated with using tar paper.
Understanding Tar Paper
Before we delve into the potential risks, it’s important to understand what tar paper is and how it works. Tar paper is made from a combination of asphalt and felt, creating a waterproof and durable material. Its primary function is to provide an extra layer of protection against water seepage. It is typically installed under the main roofing material and acts as a moisture barrier, preventing water from penetrating the roof and reaching the underlying wood structure.
The Moisture Trapping Debate
Some concerns have been raised about the moisture trapping potential of tar paper. The argument is that if water manages to get beneath the roofing material, tar paper may create a barrier that prevents the moisture from evaporating. As a result, the trapped moisture can lead to wood rot and other related issues.
While it is true that tar paper can act as a barrier for moisture, it is important to note that its primary function is to prevent direct water penetration, such as from heavy rain or leaks. When tar paper is properly installed, it acts as a protective layer that helps shed water away from the wood, reducing the chances of rot. However, if water does manage to infiltrate due to improper installation or damage to the roofing material, there is a possibility that moisture can be trapped against the wood.
Proper Installation and Maintenance
To mitigate potential moisture trapping risks, proper installation and regular maintenance are crucial. When installing tar paper, it is essential to ensure that it is laid down smoothly and without any wrinkles or gaps. Proper overlap between the tar paper sheets is also important to create a continuous barrier. Any damage to the tar paper should be repaired promptly to maintain its effectiveness.
Additionally, regular inspection and maintenance of the roof are necessary to prevent any issues related to moisture trapping. This includes checking for any signs of water damage, such as discoloration or soft spots on the wood. Keeping the roof clean and free from debris, such as leaves or branches, can also help prevent water buildup and potential moisture trapping.
Other Factors Influencing Wood Rot
It is important to note that while tar paper can potentially contribute to moisture trapping, other factors also play a significant role in wood rot. Poor ventilation, excessive humidity levels, and inadequate drainage are common culprits that can lead to wood rot, regardless of the presence of tar paper. Therefore, tar paper should not be solely blamed for wood rot issues, as multiple factors need to be considered.
While tar paper can provide effective protection against water infiltration, concerns have been raised about its potential to trap moisture and contribute to wood rot. It is important to acknowledge that when properly installed and maintained, tar paper can be an effective barrier against water penetration. However, if water manages to infiltrate due to improper installation or other issues, there is a possibility that tar paper can trap moisture against the wood, leading to wood rot. Regular inspection, maintenance, and addressing any issues promptly are key to preventing wood rot, regardless of the presence of tar paper.