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AfterAndersen Roofing: The Los Angeles Owner’s Guide
If you have an Andersen roof component that’s failed or failing, you’ll pay between $470 and $2,125 for the repair in Los Angeles, depending on the part, and we keep the most common Andersen-compatible flashings, sealants, and vent boots on our trucks so we can usually handle it in one visit. Most homeowners find out something’s wrong after a rain, when a water stain shows up on the ceiling or a drip starts near a skylight. Occasionally it’s a missing shingle or a vent boot that’s cracked wide open after a Santa Ana wind event. Either way, you want the right part matched to your roof, not a generic box-store substitute that fits poorly and leaks again in eighteen months.
We’re an independent Los Angeles contractor. We install and repair Andersen window and door components as part of roofing work, but we’re not affiliated with Andersen Corporation. If you need a roof penetration sealed around an Andersen skylight or a flashing matched to an Andersen deck door threshold, we stock those parts and know how they’re supposed to sit.
Which Andersen Models This Applies To
The Andersen parts that show up in roofing work in Los Angeles fall into a few familiar groups: skylight flashing kits from the Andersen 400 Series and the newer Andersen LuminAire line, vent collars and pipe boots that come with Andersen accessory roof penetrations, and the aluminum drip edge and step flashing profiles that Andersen specifies for their exterior door and window installations where they meet the roof plane. If you have an Andersen skylight, the model number is stamped on a label inside the frame, usually on the left side when you open it. Write that number down before you call anyone, because the flashing kit is matched to the skylight’s curb or deck-mount style, and the wrong kit means re-roofing the penetration twice.
The compatibility gotcha most Los Angeles homeowners don’t know: Andersen’s deck-mounted skylights use a specific flashing profile that overlaps the underlayment in a particular order, and if a roofer substitutes a universal flashing, the first wind-driven rain will find the seam. We use OEM Andersen flashing kits whenever the skylight is still under warranty, and we’re honest with you when a quality aftermarket equivalent will perform the same for less. On older Andersen units that are out of production, aftermarket is sometimes the only option, and we’ll tell you that up front before any work begins.
Signs Your Andersen Roofing Is Failing
- Water staining around the skylight frame or on the ceiling below it. The flashing has lifted or the sealant bead has cracked, letting water track along the roof deck. In Los Angeles, the UV exposure breaks down exterior sealant faster than most manufacturers expect, and a five-year-old sealant bead can look like a ten-year-old one.
- Damp drywall or peeling paint on the wall below a roof-to-wall intersection. Step flashing behind the Andersen door or window has slipped or corroded. This is common on older Los Angeles homes where the original flashing was galvanized steel and has spent thirty years in coastal air or smog.
- Visible gaps or lifted shingles around roof penetrations like vent pipes or exhaust hoods. The rubber boot or collar has dried and cracked from heat and sun. Once a boot cracks, water follows the pipe straight into the attic, often without showing on the roof surface at all.
- Granules from shingles collecting in gutters or on the patio below the roofline. The roof deck is moving or the shingles near an Andersen skylight curb are breaking down, often because the original curb wasn’t flashed to shed water away from the seam.
- Daylight visible through the attic around a skylight shaft or roof vent. The seal or flashing has separated enough to let light through, which means water has a path too. In Los Angeles, this often shows up after a stretch of Santa Ana winds that worked the flashing loose.
Replacement Cost & What’s Included
Most Andersen-related roofing repairs in Los Angeles run from $470 to $2,125 installed. A simple vent boot replacement with the sealant and labor included sits at the lower end, around $470 to $825, while a full skylight flashing kit replacement with the old sealant removed, new underlayment spliced in, and the OEM flashing installed runs higher, typically $1,100 to $2,125 depending on roof pitch and access. Roof repair work in Los Angeles generally falls in that same band, and we write every allowance and every part cost on a written change order before any work starts, so the number you agree to is the number you pay.
Here’s what our roof repair pricing looks like in Los Angeles:
- Vent boot or pipe collar replacement: $470-$825
- Step flashing repair at roof-to-wall intersections: $710-$1,650
- Andersen skylight flashing kit replacement: $1,100-$2,125
- Sealant and minor flashing touch-up: $470-$825
- Full roof replacement (when the deck around the Andersen unit is too far gone): $9,440-$23,600
Every job we do in Los Angeles includes the part, the labor, the sealant, and the disposal of anything we tear off. The 90-Day Done Right Promise is written on every contract. If the flashing leaks or the boot fails inside ninety days, Tom Barrett comes back and makes it right. No phone tag, no excuses.
DIY or Call Us?
You can safely do a few things yourself: check the Andersen skylight model number on the inside label, clear debris from around the flashing, and take photos of any visible cracks or lifted seams. That information helps us price the job accurately over the phone. What you shouldn’t do is get on a Los Angeles roof with a caulk gun and try to seal around a skylight or vent boot from above. Roof work is dangerous, and a homeowner fall off a two-story Spanish tile roof is a life-changing injury, not a Saturday project. Worse, a bead of sealant over a failed flashing doesn’t fix the underlying lap order, so the leak comes back and you’ve spent a weekend on a temporary patch.
If you can see the problem from the ground or from inside the attic, call us at (877) 610-1318. We’ll walk you through what to look for, give you an honest range over the phone, and show up with the right part on the truck. No trip charge inside Los Angeles County.
FAQs
An Andersen OEM flashing kit on a properly installed skylight should last fifteen to twenty years in Los Angeles, but the sealant bead around the perimeter typically needs a refresh every five to seven years because our UV exposure is brutal on exterior caulking. Call (877) 610-1318 and we’ll inspect yours and tell you what’s actually needed, not what’s easy to sell.
No, a cracked vent boot cannot be reliably repaired, because the crack grows with every temperature swing and any patch is temporary. Replacement is the honest fix, and at $470 to $825 it’s far cheaper than the ceiling repair you’ll need if the leak continues. Call us at (877) 610-1318 for an exact quote.
Most Andersen-related roofing repairs in Los Angeles are done in two to four hours on-site, assuming the roof deck around the penetration is sound. We’ll confirm the scope in writing before we start, so you’ll know the timeline before we lift a tool.
We stock the most common Andersen-compatible flashings, vent boots, and sealants on our trucks, and we can order any OEM Andersen part the same week from our Los Angeles suppliers. You don’t need to order anything yourself, and you won’t pay a markup above what the part costs us. If it’s an older Andersen unit, we’ll tell you plainly if the part is still available or if we need to go with a quality aftermarket equivalent.
Get Your Andersen Roof Component Fixed Right
If your Andersen skylight is leaking or a vent boot has cracked, don’t wait for the next rain to prove it. Call Barrett & Sons Construction at (877) 610-1318 and tell us what you’re seeing. We’ll give you a straight answer, a written estimate, and a name you can hold accountable. We’ve been serving Los Angeles since 1998, and we’ll do it right the first time, or we’ll come back and make it right.
Written by Tom Barrett, Owner, Barrett & Sons Construction at Barrett & Sons Construction, serving Los Angeles and nearby areas.