Fog, salt air and a roof that never fully dries
Fog and overcast are common here at night and in the morning (Wikipedia, Half Moon Bay), and the July high averages only 64.8 F. Roofs get little sun to dry them, so moss and rusted fasteners are what we find first. We check nail heads, flashing edges and the north slopes.
The 2020 census counted 4,833 housing units in Half Moon Bay, and 68.7% of occupied units were owner-occupied (Wikipedia, Half Moon Bay). Most of the year's rain falls between November and April, and January's average high is only 58.4 F. A roof that spends five months wet and the rest under morning fog has moss, corrosion and soft fascia more often than heat damage, so the inspection starts with the lowest edges, the fasteners and the gutters.

Salt air shortens the life of exposed metal, which is why the estimate lists fasteners and flashing materials by name.
Pacific storms on Highway 92
The city gets about 26 inches of rain a year, and winter storms hit the Coastside head on. Wind pushes rain sideways under shingle edges and strips ridge caps. If a storm damages your roof, photograph it, cover what you safely can and call.

Main Street, Pillar Point and the pumpkin fields
Half Moon Bay's historic downtown has buildings dating to 1869, and the James Johnston House is one of four local sites on the National Register of Historic Places (Wikipedia, Half Moon Bay). Local farms grow houseplants, flowers, Christmas trees, pumpkins and artichokes, and the city is known for its October Art and Pumpkin Festival. Pillar Point Harbor sits at the northern edge of town, and the big-wave surf break known as Mavericks lies just offshore.
Cabrillo Highway (State Route 1) runs north and south, and Route 92 brings traffic in from the east. Crews, deliveries and dumpsters all arrive on those two roads, so we plan loads and arrival times ahead of the job day.
Same climate zone as Alameda, different weather
Half Moon Bay sits in Climate Zone 3, the same zone as Alameda, per the Energy Commission. A cool-roof product is not required for a single-family reroof. Coastal weather is a far bigger factor in material choice than the zone. The City of Half Moon Bay issues permits inside its limits; your estimate states who pulls it.
Coastside roof services
- Roof Repair
Fog keeps shingles damp, so moss, rusted fasteners and failed sealant are the usual leak sources. We check nail heads, flashing edges and north slopes first, and name the fixes in a written scope.
- Roof Replacement
Salt air shortens the life of exposed metal, so we spell out fasteners and flashing in the estimate. With 68.7% of homes owner-occupied, owners keep roofs a long time and should compare materials line by line.
- Storm Damage Roofing
Winter storms from the Pacific lift ridge caps and drive rain sideways under shingle edges. We photograph the damage for your insurer and write the scope; you and your insurer settle the claim.
- Gutters
Long wet seasons and fog drip fill gutters with moss and debris. Most rain falls between November and April, so we confirm gutter slope and downspouts are clear before the first winter storm.
- Emergency Roof Repair
Phone triage and tarp advice first; arrival over Highway 92 depends on crew availability. In bad weather, we tell you plainly how long the trip may take so you can plan temporary cover.
- Roof Inspection
A photo inspection before the wet season records rusted fasteners, lifted ridge caps and damp decking on a fog-soaked roof, so a repair or reroof is scoped from facts you can show other bidders.
- Historic Home Roofing
Half Moon Bay keeps a historic downtown district with buildings dating to 1869. On an older house, confirm with the city whether the work changes the building's look before you choose a roofing material.
- Roof Maintenance
On a roof that rarely dries, a yearly moss treatment check, fastener inspection and gutter clean-out slows corrosion. A dated record also helps if a winter storm later damages the roof.
The drive over the hills
The Alameda office books inspections ahead of time. Because Highway 92 crosses the hills and traffic varies, we plan extra time. Urgent leaks begin with a phone call, and arrival depends on who is free that day.
El Granada and the rest of the Coastside
See El Granada, Millbrae and Belmont. Reviews shown on this site are all Alameda reviews.

