Underlayment is a crucial part of any roofing system. It’s the protective layer installed between the roof deck and the outer roofing materials, like shingles or metal panels. Choosing the right underlayment for roofing can significantly impact the durability and performance of your roof. Whether you’re tackling a roofing project or simply curious, here are five key factors to consider when choosing roof underlayment types.
1. Type of Roof
The type of roof you have plays a significant role in determining the best underlayment. For example:
- Asphalt Shingles: Roofing felt or synthetic roofing underlayment are common choices.
- Metal Roofs: Rubberized asphalt underlayment is preferred due to its durability and ability to withstand extreme temperatures.
Each type of roof requires an underlayment tailored to its specific needs. For instance, metal roofs often pair well with underlayments that repel water and reduce noise.
2. Climate and Weather Conditions
Extreme Temperatures
In areas with hot summers and freezing winters, underlayment must be able to endure temperature extremes. Rubberized asphalt underlayment and synthetic roofing underlayment are excellent for these conditions, as they resist cracking and maintain flexibility.
High Wind and Ice Dams
If you live in a region prone to high wind or ice dams, you’ll need a durable underlayment that stays in place under stress. Synthetic underlayment and rubberized asphalt are particularly effective at protecting your home in harsh climates.
Rainy Regions
Underlayments like asphaltic roofing felt may suffice in mild climates, but in areas with heavy rainfall, a bitumen synthetic option is better as it repels water and provides superior protection.
3. Roofing Materials
The outer material of your roof also influences the underlayment choice. Here’s how:
- Asphalt Shingles: Roofing felt or synthetic underlayment is commonly used due to their compatibility and cost-effectiveness.
- Metal Roofs: Rubberized asphalt underlayment is ideal because it provides extra protection against moisture and corrosion.
- Tile Roofs: Heavier tiles may require a more robust underlayment to handle the added weight.
Matching the underlayment to your roofing materials ensures a cohesive and long-lasting roof system.
4. Building Code Requirements
Understanding Local Building Codes
Before selecting underlayment, it’s essential to consult your local building codes. These regulations dictate the types of roof underlay allowed for specific roofing projects.
Why It Matters
Building codes ensure that your roof meets safety standards and can withstand local weather conditions. For example, some areas require rubberized asphalt underlayment for roofs in high-wind zones, while others may mandate roofing felt for certain residential projects.
Working with experienced roofing contractors can help ensure your underlayment choice aligns with local building codes.
5. Performance and Durability
Synthetic vs. Felt
- Synthetic Roofing Underlayment: Lightweight, durable, and resistant to tears, it’s an excellent choice for modern roofing projects. It works well with various roof types, including metal roofs and asphalt shingles.
- Roofing Felt: A traditional option made from asphaltic roofing materials, felt is cost-effective but less durable in extreme temperatures.
Rubberized Asphalt Underlayment
This high-performance underlayment offers superior water resistance and protection against ice dams. It’s ideal for areas with extreme weather or for homeowners looking for added peace of mind.
Longevity
For a long-lasting roof system, choose an underlayment that can withstand the test of time. Synthetic and rubberized options generally outlast traditional felt, making them a better investment for protecting your home.
Additional Tips for Choosing the Right Underlayment
- Consider the Roof Deck: Ensure the underlayment adheres well to the roof deck for a secure fit.
- Consult Roofing Contractors: Professional guidance can help you select the best underlayment for your roofing materials and climate.
- Evaluate Upfront Costs vs. Long-Term Benefits: While synthetic or rubberized underlayments may cost more initially, their durability often saves money in the long run.
The Bottom Line
Choosing the right underlayment for roofing is a vital step in any roofing project. By considering the type of roof, climate, roofing materials, local building codes, and performance needs, you can ensure a durable and effective roof system. Whether you opt for roofing felt, synthetic roofing underlayment, or rubberized asphalt underlayment, investing in quality underlayment protects your home from water damage, ice dams, and other potential issues. For the best results, consult professional roofing contractors to ensure your roof meets all requirements and provides lasting peace of mind.