Underlayment is a layer of material that is typically placed beneath the visible roofing material, such as shingles. It serves as an additional protective barrier between the roof deck and the roofing material. Underlayment is usually made of asphalt-saturated felt, rubberized asphalt, or synthetic materials like fiberglass or polyester. Its primary function is to provide an extra layer of protection against moisture and leaks that may penetrate the roof.
Enhanced Protection in Extreme Weather
When it comes to strong winds, proper underlayment installation can provide enhanced protection to your roof. Underlayment helps defend against water intrusion, which can weaken the roof and cause damage during high wind events. By sealing off any potential entry points for water, underlayment acts as a vital barrier, preventing not only water but also debris from penetrating the roof. When combined with other reinforcements, like hurricane straps, underlayment can significantly improve the overall strength of the roof.
Types of Underlayment
There are different types of underlayment available in the market, each with its own strengths and purposes. The three most common types are traditional felt underlayment, synthetic underlayment, and rubberized asphalt underlayment.
- Traditional Felt Underlayment: This is the most widely used type of underlayment. It is made of cellulose fibers saturated with asphalt and is relatively inexpensive. Although it offers good protection against moisture, it may not withstand strong winds as well as other types.
- Synthetic Underlayment: This type of underlayment is typically made from polyester or fiberglass and is stronger and more tear-resistant than traditional felt. It offers improved durability, better moisture resistance, and enhanced performance in high-wind situations. Synthetic underlayment is often recommended for areas prone to hurricanes or strong winds.
- Rubberized Asphalt Underlayment: Rubberized asphalt underlayment is known for its exceptional flexibility and resistance to tearing. It is best suited for high-wind areas, as it can withstand extreme weather conditions and provides excellent waterproofing capabilities.
Installation Considerations
The effectiveness of underlayment in strengthening your roof against strong winds relies on proper installation. Here are some important considerations:
- Nail Placement: It is crucial to follow the manufacturer’s instructions for nail placement when securing underlayment. Nails should be correctly positioned, neither too loose nor too tight, to prevent wind uplift.
- Overlapping: Proper overlapping of underlayment is important for ensuring a continuous barrier against water and debris. The manufacturer’s guidelines should be followed to determine the appropriate overlap required for the specific type of underlayment being installed.
- Sealing: In areas prone to heavy rainfall or wind-driven rain, the underlayment should be sealed using roofing cement or other approved methods to prevent any potential water infiltration.
Underlayment can play a significant role in strengthening your roof against strong winds. By acting as an additional protective layer, underlayment helps mitigate water intrusion and potential damage caused by high winds. Choosing the right type of underlayment and ensuring proper installation are key factors in maximizing its effectiveness. When combined with other wind-resistant measures, such as hurricane straps or reinforced roofing materials, underlayment can provide homeowners with added peace of mind and protection during severe weather events.