Architectural shingles
Metal roofing
Tile roofing
GAF
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Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roof Replacement Across Valley Glen
Roof replacement in Valley Glen is a job that starts long before the first shingle comes off. On the tract homes that define this neighborhood, the real work often happens underneath, where 1950s decking and underlayment have spent decades baking in San Fernando Valley heat. Marquis Roof Repair handles the full replacement from tear-off to final inspection, and we know exactly what hides under the old roofs here because we open them up every week. If you’re seeing granules in the gutter, curling shingles, or a ceiling stain after the last Santa Ana wind, call (866) 705-2978 for a free estimate. We serve all of Valley Glen, including the blocks off Oxnard Street, Van Nuys Boulevard, and the residential streets west of the 170.
Why Marquis Roof Repair Is Valley Glen’s Preferred Roof Replacement Company
Valley Glen homeowners ask us to replace roofs because we investigate before we recommend. Ron Thibodeau built Marquis Roof Repair around a repair-first philosophy: diagnose the actual condition of the decking, underlayment, and flashing, then recommend replacement only when the roof genuinely needs it. That’s not how every roofer in the Valley works. Some will quote a full replacement the moment they see a 60-year-old built-up roof, without ever checking whether the substrate can still carry new material. We won’t do that.
Our crews work Valley Glen constantly, and our familiarity with the neighborhood’s housing stock matters. The 1940s through 1960s tract homes here were built fast, with materials that were never meant to last seventy years. We know what a Valley Glen tear-off reveals before we start, which means your quote carries honest allowances for the work that actually needs to happen. From first inspection to final shingle, it’s built to the Marquis standard.
Styles & brands we work with
Flat Roof Replacement in Valley Glen
Flat Roof Replacement in Valley Glen means tearing off the original tar-and-gravel or built-up roof on a postwar single-story home or low-rise apartment building and rebuilding it with a system that can handle inland heat. Many Valley Glen flat roofs are still the originals from the 1950s, and after seventy summers of 100°F+ heat, the reflective coating has alligatored and the gravel has worn thin. A flat roof replacement on a typical Valley Glen tract home runs $9,000 to $18,000 depending on square footage, existing deck condition, and the roofing system you choose. Buildings with multiple units or parapet walls run higher because of the additional flashing work.
What a flat roof replacement involves
We strip the existing roof down to the deck, inspect the sheathing and framing, then install a new membrane system with proper slope, drainage, and flashing at all penetrations. On Valley Glen homes with original 1x skip sheathing, we often re-sheath before laying the new roof because old board decking cannot hold fasteners to current wind-uplift standards. That step gets priced and approved in writing before we start.
When Valley Glen homeowners need it
If your flat roof is bleeding tar in the summer heat, holding water after rain, or showing visible cracks in the coating, the waterproofing has failed. Waiting doesn’t make it cheaper. The longer water sits against old decking, the more likely the framing underneath needs repair too. Call us early and we’ll tell you honestly whether a repair buys you a few more years or whether replacement is the better money.
Roof Installation in Valley Glen
Roof Installation in Valley Glen almost always means working with the framing and decking decisions made when the house was built. The original roofs on these tract homes were installed with 1x skip sheathing, which simply doesn’t meet the nailing requirements for today’s architectural shingle wind ratings. When we install a new roof here, we’re not just laying shingles; we’re bringing the roof assembly up to code. A full architectural shingle installation on a typical Valley Glen home runs $12,000 to $22,000, with flat or low-slope sections priced separately depending on system type. That range assumes new decking where the old skip sheathing can’t be reused.
New decking and underlayment done properly
Before any shingle goes down, we confirm the decking is solid and properly fastened. In Valley Glen, that frequently means replacing delaminated 1x sheathing with new plywood, then laying a quality synthetic underlayment with ice and water shield through valleys and around penetrations. Skipping this step is the single biggest reason a new roof in this neighborhood fails early or loses its manufacturer wind warranty.
Architectural shingles that hold a wind rating
With proper decking, fastening, drip edge, and starter strip, architectural shingles from any of our manufacturer lines earn their full wind rating and last 25 to 30-plus years here. We work with Tamko, Boral, GAF, and CertainTeed, among others, and we recommend the line that fits your roof geometry, exposure, and budget, not the brand we happen to stock that week. Seven manufacturer lines, one point of contact.
Trusted Brands We Service in Valley Glen
Marquis Roof Repair is authorized to install products from seven major roofing manufacturers: GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. That breadth matters for Valley Glen homeowners because it means you get genuine choice in material, warranty length, and price point. A single-brand roofer can only sell you what they carry. We can match the right material to your roof; whether that’s a premium architectural shingle from CertainTeed for a steep-pitch gable or a Boral tile profile that suits a low-slung Valley ranch. Brand-agnostic guidance means the recommendation comes from your home’s actual condition, not from what’s sitting in the warehouse.
See the difference
Before
After
Before
After
Before
AfterCommon Roof Replacement Problems We See in Valley Glen Homes
- Original 1x skip sheathing that can’t hold nails to spec. The 1950s tract homes in Valley Glen were built with spaced board decking, and after decades of thermal cycling, those boards split and delaminate. Most require replacement with plywood before new shingles can earn their wind rating.
- Alligatored reflective coating on original tar-and-gravel flat roofs. After a hot Valley summer, built-up roofs crack and the coating fails in a pattern that local roofers can spot from the street. By the time you see granular loss in the gutter, the waterproofing is usually compromised.
- Failed underlayment hidden under the old roof. Original tar paper from the 1950s is brittle and torn on nearly every Valley Glen tear-off we do. Exposing it is the moment the replacement quote moves; which is why we write a decking and underlayment allowance into every contract.
- Loose drip edge and ridge material from Santa Ana winds. Dry Santa Ana winds lift poorly fastened edges and ridge material where the original installation was marginal. Valley Glen’s flat, open streets don’t have tree canopies to break the wind, so edge fastening is not a place to cut corners.
Pricing for Roof Replacement in Valley Glen, CA
A full roof replacement in Valley Glen runs $12,000 to $22,000 for a typical single-story tract home with architectural shingles. Flat roof replacement runs $9,000 to $18,000 depending on system type and square footage. New construction and homes with steep pitches, multiple roof planes, or extensive water damage run higher. What moves the quote most in Valley Glen is decking. If your home still has the original 1x skip sheathing, plan on a re-sheathing line item; it’s usually $1,500 to $4,000 depending on roof area, and it’s often the difference between a roof that lasts 10 years and one that lasts 30. We write allowances into the contract for exactly this work, so the number you sign is the number you can plan around, and every change gets priced and approved in writing before we touch it. Call (866) 705-2978 for a detailed, free estimate on your home.
We Also Serve Cities Near Valley Glen
While this page covers Roof Replacement in Valley Glen specifically, our crews also work throughout the surrounding San Fernando Valley. We regularly handle Roof Replacement projects in Van Nuys, Sherman Oaks, Encino, and North Hills, where the housing stock and climate challenges are similar. If you’re just outside Valley Glen, call us and we’ll let you know if we serve your street.
Serving Valley Glen, CA — Our Local Coverage Area
We’re based in the Valley Glen area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs About Roof Replacement in Valley Glen
Because the original 1x skip sheathing and tar paper under the shingles were never built to last 70 years, and once we expose them, code requires re-nailing or replacing the deck to current wind-uplift standards. Valley Glen’s tract homes were built with spaced board decking that can’t hold a nail to spec after decades of heat cycling. If the original bid didn’t carry a written allowance for that work, the number moves. We write the decking and underlayment allowance into every Valley Glen contract so there’s no surprise. Call (866) 705-2978 for a quote that reflects your home’s actual condition.
Compare the decking line item, the underlayment specification, the fastener schedule, and the flashing scope, not just the total. A low quote from another roofer may assume your existing decking can be reused when it can’t, and the line-item difference is exactly what drives a Valley Glen replacement over budget. Ask each roofer whether they’ve inspected your deck condition and whether they carry a written allowance for re-sheathing. Then ask what shingle they’re quoting and whether the price includes starter strip, drip edge, and ridge vent. Call (866) 705-2978 and we’ll walk the roof with you before we price it.
Yes. Valley Glen sits in the inland San Fernando Valley, where summer highs regularly exceed 100°F, and that sustained heat accelerates shingle aging, thermal expansion, and coating failure on flat roofs far faster than coastal neighborhoods like Sherman Oaks or Encino. Original 1950s reflective coatings here alligator and crack after just a few hot seasons, and granular loss from baked shingles is common on homes that have never been re-roofed. If your roof is 20-plus years old in this climate, it’s probably nearing the end of its service life. Call (866) 705-2978 for an honest inspection.
Yes, and the weak point is usually the edge and ridge fastening where the original drip edge was marginal or missing. Valley Glen’s flat, open streets expose roofs to wind without the tree canopies that buffer some Valley neighborhoods, so loose or poorly fastened edge material lifts first. A properly installed roof with new drip edge, starter strip, and correct fastening holds its wind rating. We install to manufacturer spec on every job because the Santa Anas come for everyone here eventually. Call (866) 705-2978 for an estimate on a roof that will hold.
Yes, Marquis Roof Repair replaces flat roofs on Valley Glen’s low-rise apartment buildings, including built-up tar-and-gravel systems and modified bitumen. Multi-unit buildings have more flashing at parapets, drains, and penetrations, which drives cost and scope, but the process is the same: inspect the deck, write the allowance, and sign off on every change before we proceed. We also coordinate with property managers on tenant notice and scheduling. Call (866) 705-2978 for a building assessment and free estimate.
If you’re ready to talk about a roof replacement in Valley Glen, call (866) 705-2978. We’ll inspect the roof, show you what we find, and give you a written estimate that covers the real work, including the decking your 1950s home probably needs. Estimates are free. You can decide from there.
Written by Ron Thibodeau, Owner at Marquis Roof Repair, serving Valley Glen and the San Fernando Valley.