Skylight Leak Repair in Fullerton from $350. Forty-year-old curbs, and the sealant that was never meant to last this long. Free inspection and a written quote.
This is the most common leak we find in Fullerton and the one least often diagnosed correctly. The 1960s to 1980s tracts across this city were built with curb-mounted skylights, and the sealant bedding those curbs was never designed to last forty years. The unit is usually fine. The curb, the flashing and the sealant are what failed.
Orange County tract housing from the 1960s through the 1980s is full of original skylights, and they are the single most common leak point we find in Fullerton. The unit itself is usually not the problem. The curb it sits on, the flashing around that curb, and the sealant bedding it are.



Re-flashing and re-bedding a skylight curb runs $350 to $1,200 depending on access and what the flashing is bedded into. Replacing the unit with a modern deck-mounted skylight and an integral flashing kit starts around $900 fitted and is frequently the better value on a forty-year-old curb. Two questions move a Fullerton quote more than anything else. Whether the tile is salvageable, which is the difference between a relay and a replacement. And whether the leak is a skylight curb, which is a contained job rather than a roof job. Ask any quote which of those it has actually established.
A sound curb, sound framing and one failed face. That is a contained repair and it should be priced as one.
A site-built curb on a 1960s-80s tract roof, where another bead of sealant buys a couple of seasons and an integral kit buys decades.
Rotten opening framing, a shaft that has to be re-lined, or a tile roof where the surrounding field has to come up to reach the flashing.
Two things recur across the whole city. Concrete tile is a large share of the stock and almost always outlives the felt beneath it, and the 1960s-80s tracts are full of original curb-mounted skylights now decades past their sealant life. Between them those account for most of the leaks we are called to here.
Fullerton is its own incorporated city and issues its own building permits -- not LADBS, and not Orange County.
The useful thing about a skylight leak is that it announces itself precisely. Water appears at the corner of the shaft or runs down one inside face, and that tells you which side of the curb has failed before anyone gets on the roof. It is one of the few leaks that can be narrowed down from the ground.
Including ours. There are enough door-knockers working this county that the checks are worth making on anybody.
'Repair roof' is not a scope. 'Re-bed the skylight curb, re-flash the head, replace the vent boot' is. The second can be checked when it is finished; the first cannot, which is the point.
A fire-rated assembly, a tear-off versus an overlay, and a sheathing allowance each move the price by thousands. A cheaper quote is sometimes a lesser roof rather than a better price.
A number produced in the driveway is a guess with a decimal point on it. Nobody can price a skylight curb, a valley or a wall flashing without getting to it, or judge the ceiling below without looking at it. We do not price at the curb and we do not price from a photograph you send us.
Two things account for most of the leaks we are called to in this city, and neither is a worn-out roof.
Above the golf course. Wind finds the upslope face.
Big lots, old trees, and litter in every valley.
The newest stock here. Usually one failed detail.
1920s to 1970s on one street. Check the deck.
Backs onto the park. Debris and brush exposure.
Oldest stock, parapets, and nowhere to park a truck.
A different city, with its own building department.
The questions this job turns on, answered up front.
Often not. The glass and the frame usually outlast the curb they sit on, and on a 1960s-80s Fullerton roof it is almost always the curb flashing and the sealant that failed. We price re-flashing and replacement side by side so you can see the difference.
A great deal. Water at the top corner of the shaft points at the head flashing; down one inside face points at that side of the curb; at the bottom edge often means the sill. It is one of the few roof leaks that can be narrowed down before anyone goes up.
Most land between $350 and $1,500, and small ones caught early start around $200. Orange County runs at or above the wider Los Angeles market. What moves it is whether the deck is already wet: a leak caught at the first stain is a flashing job, and one left for two winters is a carpentry job.
One that has not reached the structure. If the stain is small, dry between rains and the sheathing above it is still sound, that is a minor leak and a few hundred dollars. Once the decking has softened or the insulation is wet, it stops being minor regardless of how small the stain looks.
Sometimes, and it is often a false economy. Roofing work in California requires a CSLB C-39 license above a small dollar threshold, and the reason most leaks get fixed twice is that the first attempt sealed the stain rather than the entry point. Ask whoever you use how they intend to find it.
Free inspection, and a written quote against a written scope. Every slope photographed before and after - the set is yours.