When Your Roof Is Over 20: A Roof Inspection Guide for North Hollywood

North Hollywood has thousands of homes with roofs that are 20 years old or more. Most of them were built in the 1950s through 1970s, and even the ones that have been re-roofed since then are approaching the end of their material lifespan. If your roof falls into that category, a professional inspection is the smartest money you can spend.

Why 20 Years Is the Magic Number

Most asphalt shingle roofs are rated for 25 to 30 years. In the San Fernando Valley, subtract 5 to 7 years from that rating. The combination of extreme summer heat, UV exposure, and Santa Ana winds wears materials down faster than the manufacturer’s lab testing accounts for.

At 20 years, a Valley roof isn’t necessarily failing. But it’s entered the zone where small problems can develop fast. A roof inspection at this stage catches issues while they’re still cheap to fix.

What an Inspector Actually Looks For

A proper roof inspection isn’t just a walk-around. Here’s what a thorough inspector checks on an older North Hollywood home:

Shingle condition. Curling, cracking, missing granules, and lifted tabs all indicate aging. Granule loss shows up as bare black patches and sandy buildup in your gutters.

Flashing integrity. Every pipe, vent, chimney, and wall junction has flashing that seals the gap. After 20 years, the sealant cracks and the metal can corrode. This is the number one leak source on aging roofs.

Decking condition. The plywood beneath your shingles should feel solid. Soft spots mean moisture has been getting through. This is checked from inside the attic as well as by feel from the roof surface.

Ventilation. Older homes in North Hollywood often have inadequate attic ventilation. Poor airflow traps heat and moisture, which accelerates every other type of damage. Your inspector should check for soffit vents, ridge vents, and signs of moisture in the attic space.

Underlayment. On roofs approaching the end of their life, the underlayment is usually degraded too. Your inspector may lift a shingle in a few spots to check what’s underneath.

Common Findings on 20-Year-Old Valley Roofs

After inspecting hundreds of roofs in North Hollywood, Valley Village, and the Arts District, the same findings come up repeatedly:

Granule loss across 30-50% of the south-facing slope (the side that takes the most sun)
Cracked pipe boot seals on 2 to 4 plumbing vents
Dried and separated flashing sealant around the chimney or where the roof meets a wall
One or two soft spots in the decking, usually near a valley or a failed flashing point
Attic temperatures 20-30 degrees higher than they should be due to missing ventilation

None of these are emergencies on their own. Together, they paint a picture of a roof that has 3 to 5 years of serviceable life left with some repairs, or needs replacement if the damage is too widespread.

What to Do With the Inspection Results

Your inspection report should give you a clear recommendation. It usually falls into one of three categories:

Good shape, check again in 2 years. Minor wear consistent with age. No active leaks or failure points. Keep an eye on it.

Repairs needed, 3-7 years of life remaining. Specific issues that should be fixed now to prevent bigger problems. A targeted roof repair job at this stage typically costs $500 to $2,500.

Replacement recommended within 1-2 years. Widespread wear, multiple failure points, or decking damage that makes patching impractical. Time to start getting roof replacement estimates and budgeting for the project.

Don’t Wait for a Leak

The worst time to find out your roof is failing is during a February rainstorm. Homeowners in North Hollywood and the surrounding Valley neighborhoods who stay ahead of inspections avoid emergency calls, water damage, and the stress of rushing a major decision.

An inspection costs $150 to $350. The problems it catches cost 10 to 50 times that when they go undetected.

Call Best LA Roofing at (818) 446-6122 to schedule a roof inspection for your North Hollywood home.