Most flat roofs do not fail in the field. They fail at the details. LA Roof Kings handles roof waterproofing Los Angeles building owners need when the drains back up, the parapets weep, and the first real rain of the season finds every weak point at once. It is part of our commercial roofing work.
We are a family-owned contractor with more than 20 years of experience. We find the actual source of the water before we sell you anything.
Roof waterproofing Los Angeles buildings need is not one product. It is the whole moisture barrier: the membrane in the field, the flashings at every penetration, the parapet walls, the drains and scuppers, and the deck underneath it all. A roof is only as waterproof as its weakest detail.
That is why we treat the roof as a system. Sealing the field of a roof while the parapet cap is open just moves the leak somewhere else.
Los Angeles roofs sit dry for months, then take everything at once. That cycle creates specific failures.
UV and heat cycling do the rest. If the leak is isolated, commercial roof repair may be all you need. Waterproofing is for when the problem is the whole assembly, not one hole.
Liquid applied membranes. Fluid applied systems cure into one seamless barrier and handle complicated details, curbs, and odd geometry that sheet goods cannot wrap cleanly. Sheet membranes. Modified bitumen and built up roofing give you layered redundancy where the roof takes traffic and load.
Single-ply. TPO roofing is fast and reflective, and welded correctly it is watertight. Deck and detail work. Parapet caps, drain retrofits, scupper reconstruction, and flashing rebuilds. This is the unglamorous part of roof waterproofing Los Angeles crews skip, and it is where the leaks actually are.
People use the words interchangeably. They are not the same thing. A silicone roof coating is a restoration product. It goes over a roof that is fundamentally sound and adds years to it.
Waterproofing is the broader job. It includes coatings, but it also means rebuilding the details, correcting the drainage, and treating the deck. If your roof only needs a fresh skin, a coating is cheaper and faster. If water is getting in behind the membrane, a coating will hide the problem instead of solving it. And if the deck or the insulation is already wet, neither one works and commercial roof replacement is the honest answer.
Standing water is the single most common thing we find on a leaking flat roof. Coating over it changes nothing, because the water is still sitting there.
The fix depends on the cause. Sometimes it is a blocked or undersized drain. Sometimes it is a sagging deck or a low spot that was never sloped correctly. We add tapered insulation to rebuild the slope, retrofit or relocate drains, and cut new scuppers where the roof cannot shed water on its own. Then we waterproof.
We find the source before we quote the work. That means going up on the roof, tracing the water, and taking core samples where the moisture may already be in the insulation. You get photos and a written scope. Start with a free roof inspection.
Russ, the owner, is on the job sites. We hold California Contractor License #600662 and we have been on Los Angeles County roofs for more than 20 years. Every job comes with a written warranty.
Roof waterproofing is the process of making the entire roof assembly resistant to water intrusion. It covers the membrane, the flashings, the penetrations, the parapet walls, the drains, and the deck. It is a system, not a single product applied to the surface.
Yes, when the work addresses the actual source. Most leaks come from failed flashings, open parapet joints, blocked drains, or penetrations rather than the field of the roof. Waterproofing that does not fix the source will not stop the leak, which is why we trace the water before we quote anything.
A coating is one method. Waterproofing is the whole job. A coating is a liquid membrane applied over a roof that is structurally sound. Waterproofing may include a coating, but it also covers drainage correction, flashing rebuilds, parapet work, and deck repair. If water is getting in behind the membrane, a coating alone will not solve it.
You fix the slope or the drainage, not the surface. That usually means tapered insulation to rebuild positive slope, a drain retrofit, or new scuppers. Coating over standing water does nothing, because the water is still sitting on the roof.
Yes, in most cases. If the deck is sound and the insulation is dry, an existing roof can be waterproofed rather than replaced. If the insulation is saturated, waterproofing over it traps the moisture and the roof will fail again. Core samples tell us which situation you are in.
It depends on the system, the quality of the detail work, the amount of ponding, and whether the roof gets maintained. Clean drains and an annual inspection extend the life of any waterproofing system. We give you a realistic expectation for your roof after we inspect it.
