What a Shingle Re-Roof Costs in the San Fernando Valley — Common Mistakes
The working range for an asphalt shingle roof in the Valley, before anybody puts a figure on paper.
A price without a scope is not a price. An asphalt shingle roof in the San Fernando Valley generally runs $5.50 to $9.00 a square foot installed, but the figure only means something once you know what has been assumed about the deck, the layers and the flashing.
What you are actually paying for
Layer count, deck condition and roof complexity move the figure more than the shingle you choose. Tearing off two existing layers instead of one adds disposal and labour before a single new shingle goes down, and a cut-up roof with several valleys and dormers takes far longer per square than a simple gable.
Where quotes diverge
Deck repair should be priced per sheet in writing before work starts, because it is the one item nobody can size until the covering comes off. The starter course and the drip edge are where cheap work shows first. A starter strip laid the wrong way round, or an eave with no metal under the first course, will wick water back into the fascia no matter how good the shingles above it are. It is also the line that most often separates two quotes that looked identical on page one.
How the San Fernando Valley changes the figure
Summer is the problem here. The Valley runs ten to fifteen degrees hotter than the coast and holds it for weeks, so a roof surface that reads 90 degrees in Santa Monica is well past 160 in Van Nuys by mid-afternoon. Everything on the roof expands into that heat and contracts again overnight, and it is that daily movement, not the peak temperature, that opens laps and backs fasteners out. Most of the housing went up between 1950 and 1975, which means original decking, undersized ventilation and at least one previous layer that somebody roofed straight over rather than tearing off.
What we look at before quoting
- Granule loss across the field, and how much is sitting in the gutters
- Curling, cupping or cracking, particularly on the sun-facing slopes
- Nail placement and whether shingles have begun to back off the deck
- Valley construction, and whether it is woven, closed-cut or metal-lined
- Flashing at every wall, chimney, skylight and pipe penetration
- Deck condition underfoot, checked by walking rather than by eye
- Attic ventilation, both intake at the eave and exhaust at the ridge
Common questions
Is financing worth it on a roof?
It depends on the alternative. Deferring a failing roof through another wet season usually costs more in interior repairs than the finance charge would have.
Why is one quote thousands cheaper than another?
Almost always because it excludes something. Compare the deck repair rate, the layer count and whether flashing is being replaced or reused before you compare totals.
The honest summary
Shingle roofs rarely fail suddenly. They give years of warning through granule loss and edge curl, and the difference between a planned replacement and an emergency one is usually whether anybody was looking. In the San Fernando Valley the thing to watch is attic temperature and intake ventilation, because a Valley attic that cannot breathe cooks the underside of the roof as hard as the sun cooks the top.
Free inspection, drone photography where access is difficult, and a written estimate with deck repair priced per sheet. No obligation.
More on Shingle Roofing
- What a Shingle Re-Roof Costs in Pasadena — Seasonal GuideShingle Roofing
- What a Shingle Re-Roof Costs in the WestsideShingle Roofing
- What a Shingle Re-Roof Costs in Southern California — Seasonal GuideShingle Roofing
- Nail Pops and What They Signal — Myths and FactsShingle Roofing