Commercial roofing in Los Alamitos is largely about older low-slope roofs. Many strip centers, medical offices and small business buildings here have flat roofs that are decades old, and some have been patched, coated or covered over more than once. Whether yours needs a repair, a recover or a full tear-off depends on what is under the surface.
Want to know what is under your roof before planning the next one? Book a roof diagnosis online. If water is coming in now, call 1-888-346-7663 for emergency service.
A compact city with a mature building stock
Los Alamitos incorporated in 1960 and covers only about four square miles, so its commercial roofs cluster along a few corridors, and many of them have been in service for a long time.
- Los Alamitos Boulevard: neighborhood centers and pad buildings, many with a decorative mansard of tile, shingles or metal wrapped around a flat roof.
- Katella Avenue: the hospital and the medical and dental offices around it, mostly one- and two-story buildings whose roofs carry rows of rooftop units and exhaust fans.
- Light-industrial and business-park buildings: block and tilt-up shells for contractors, distributors and service companies, often with several tenants under one continuous roof.
What these buildings share is history. A roof that several contractors have worked on over the years can hide old patches, abandoned equipment curbs and extra layers that never show from the parking lot, and those hidden conditions decide what the next roof can be.
What's under an older commercial roof
Older flat roofs in this part of the county were commonly built-up roofs, made of alternating layers of asphalt and roofing felt and often topped with gravel, or mineral-surfaced cap sheets. Over the decades, owners added coatings, a cap sheet over the original roof or a second roof entirely. Our guide to built-up roofing explains how these systems are layered.
Layers and weight
Every added layer adds weight and makes leaks harder to trace, because water can travel between layers before it reaches the deck. California's building code generally does not allow a new roof over one that is water-soaked or already has two layers, so a building that has been recovered once is usually headed for a tear-off next time.
Wet insulation and tired decks
Many small commercial buildings of this era have wood decks. Years of slow leaks can soak insulation and soften plywood or plank decking without leaving an obvious stain inside. Core cuts, small samples cut through the roof and patched afterward, show how many layers are present and whether the insulation is wet, and soft spots underfoot point to decking that needs replacing.
Materials that need testing
Some roofing products and mastics from earlier decades can contain asbestos. On older buildings, samples may need to be tested before tear-off, which is better built into the schedule than discovered on the first morning.
Commercial roofing in Los Alamitos: choosing the next roof
Before recommending any of these, our commercial roofing service puts the building through a 4-Phase Roof Inspection and delivers a report with annotated photos that owners and property managers can share with tenants. A Roofing Advisor walks you through the findings. Rescue Roofer, St. Lic #1137524, has roofed in Orange County since 1993.
- Repair fits a roof that is mostly dry and sound, with leaks at a few seams, flashings or curbs.
- Recover adds a cover board or insulation and a new membrane over the existing roof. It is only an option when there is a single dry, sound layer and a solid deck beneath it.
- Tear-off takes the roof down to the deck, so damaged decking can be replaced, abandoned curbs removed and drainage corrected before the new system goes on.
Our comparison of tear-off versus overlay covers the trade-offs in more depth.
Details that decide how long the new roof lasts
The mansard-to-flat joint
On many centers along Los Alamitos Boulevard, the flat roof ends at a framed wall behind the mansard, sometimes with a built-in gutter. A reroof is the moment to rebuild that termination with new base flashing and counterflashing and to make sure the gutter drains freely.
Should the mansard be redone too?
If the tiles or shingles on the mansard are sound, they can often stay. If its underlayment is worn out, redoing it while crews are already on site avoids a second project. As The No-Felt Company, we lay synthetic underlayment, never felt, on any pitched section we reroof.
Salt, dew and rooftop metal
Los Alamitos sits only a few miles inland from Seal Beach, close enough for morning marine layer and salt-carrying air. Coping caps, drain rings, scupper boxes and steel equipment curbs corrode first, usually at fasteners and seams, so corrosion-resistant fasteners and edge metal belong in the reroof specification.
Drains and ponding
Older roofs often have low spots near drains and between rooftop units. A tear-off makes room for tapered insulation and crickets that move water to the drains. A recover can add some slope too, within the limits set by curb heights, walls and roof access doors.
How a reroof day runs on an occupied building
- Before work starts: the property manager gives tenants the dates and the roof areas above their suites, and the HVAC contractor is lined up to protect units whose fresh-air intakes sit near adhesive work.
- Morning: marine-layer dew can leave the surface damp, so tear-off and prep come first and adhesive steps wait until the roof dries.
- Midday: new insulation and membrane go down only over as much roof as can be finished that day.
- Evening: the day's new section is tied in to the old roof so nothing is left exposed overnight.
Frequently asked questions
Can a new roof go over our old gravel roof?
Sometimes. The loose gravel has to come off, the old roof must be dry and sound, and there can be only one existing layer. Core cuts answer the last two before anyone commits to a recover.
Will the new roof have to be white?
Usually it has to be highly reflective, which in practice often means white or a very light color. When most of a commercial low-slope roof is replaced, the state energy code typically requires a rated cool-roof surface, and the permit review confirms what applies to your building.
How do we know if the insulation is wet?
Core cuts show it directly. Soft spots underfoot, blisters and ceiling stains far from any obvious opening are warning signs worth an inspection.
Do you handle emergency leaks in Los Alamitos?
Yes. Our Huntington Beach office is a short drive away, and emergency calls are covered by our 1-hour arrival window guarantee. Our guide for an emergency roofer in Los Alamitos covers what to do while you wait.
Want to know what is under your Los Alamitos roof before you commit to anything? Book your roof diagnosis online or call 1-888-346-7663. We will inspect the roof, document what we find in a photo report and give you a free estimate for the repair, recover or tear-off that fits your building.