Understanding whether your roofer used the right underlayment is crucial. Underlayment is the protective layer installed beneath your shingles or tiles—it’s what actually keeps water out when heavy rains hit the San Fernando Valley. Knowing what was installed on your roof can help you avoid unexpected leaks, long-term damage, and costly repairs.
What Does Roof Underlayment Do?
The underlayment is your roof’s first line of defense against water intrusion. It provides:
- Moisture protection in case shingles crack or blow off
- Extra insulation against heat in cities like Northridge, Van Nuys, and Burbank
- Added durability to extend the lifespan of your roof
Without the proper underlayment, your roof may look fine on the outside but fail when the next storm rolls in.
Types of Roof Underlayment
Asphalt-Saturated Felt (Felt Paper)
- Traditional material used for decades
- Affordable, but less durable in extreme heat (common in Woodland Hills and Encino)
Synthetic Underlayment
- Lightweight and tear-resistant
- Excellent water resistance
- Longer lifespan, making it ideal for homeowners in Sherman Oaks, Tarzana, and Calabasas
Rubberized Asphalt Underlayment
- Premium protection with adhesive backing
- Provides superior waterproofing for areas prone to leaks like valleys and eaves
- Best for homes in Glendale, Pasadena, and Los Angeles where heavy rains can be more damaging
Signs Your Roofer Used the Right Underlayment
- They pulled permits and followed code: Local building codes in Los Angeles and the San Fernando Valley require specific underlayment standards.
- Your roof has no leaks after the first rain: A strong underlayment should keep interiors dry even in heavy fall storms.
- You were shown material specs: Reputable roofers (like The Roofer Bros) provide documentation of the products they install.
- You notice added protection in vulnerable areas: Proper underlayment is always doubled up in valleys, around chimneys, and near skylights.
What Might Not Be Covered by Insurance?
Even with the right underlayment, it’s important to know what your homeowners insurance may not cover:
- Normal wear and tear: General aging or sun damage is usually excluded.
- Poor maintenance: If you don’t clean gutters or replace damaged shingles, future leaks may not be covered.
- Interior water damage: A roof leak may be covered, but damage to walls, ceilings, or furniture may require additional coverage.
Tips for Homeowners in the San Fernando Valley
- Ask your roofer what underlayment they’re using before installation.
- Request proof of materials used—don’t just take their word for it.
- Schedule regular roof inspections to catch hidden issues before rainy season.
- Choose a licensed, BBB-accredited roofer for guaranteed quality.
Protect Your Home with The Roofer Bros
If you’re unsure about the underlayment on your roof, it’s best to have it inspected by a trusted professional. At The Roofer Bros, we specialize in roof inspections, repairs, and replacements across the San Fernando Valley, including Northridge, Burbank, Glendale, Sherman Oaks, Woodland Hills, and Encino.
We use high-quality underlayments designed for California’s heat and fall rains, ensuring your roof stays durable and watertight. Plus, we can assist with insurance claims if your roof has already suffered damage.
