While plywood is commonly used as a sheathing material for roofs, it is not typically recommended to use it as a primary roof underlayment. Plywood lacks the waterproofing properties necessary to effectively protect the roof deck. Additionally, plywood may not have the same strength and tear resistance as specialized underlayment materials.
However, there are situations where plywood can serve a temporary role as roof underlayment. For example, if a roof has been damaged due to a storm or other unforeseen circumstances, using plywood temporarily can provide temporary protection until more suitable underlayment can be installed. In such cases, it is important to consult with a professional roofer to ensure proper installation and minimize the risk of water infiltration.
Considerations for Using Plywood as Roof Underlayment
If you decide to use plywood as temporary roof underlayment, there are a few considerations to keep in mind:
- Waterproofing: As plywood is not inherently waterproof, it is crucial to apply a waterproof barrier over the plywood sheets to prevent water infiltration.
- Proper Installation: Plywood should be installed with staggered joints and securely fastened to minimize the risk of leaks.
- Timely Replacement: Since plywood is not designed for long-term use as roof underlayment, it should be replaced with specialized underlayment as soon as possible to ensure optimal protection.
- Adhesion and Compatibility: When choosing a final roofing material, ensure that it can properly adhere to the plywood underlayment.
Consult a Professional for the Best Solution
While plywood can offer a temporary solution as roof underlayment, it is advisable to consult a professional roofer for expert advice. They can assess the specific needs of your roof and recommend the most suitable underlayment material for long-term durability and protection.
While plywood may be a common choice for roof sheathing, it is generally not recommended as a primary roof underlayment. Specialized underlayment materials such as felt paper or synthetic membranes offer better waterproofing properties, durability, and tear resistance. However, in emergency situations, plywood can be used temporarily as roof underlayment with the proper precautions and professional guidance. Ultimately, consulting a roofing professional is crucial to determine the best underlayment option for your roof’s specific needs.