Architectural shingles
Metal roofing
Tile roofing
GAF
Owens Corning
Flat & low-slopeFree roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Fast, Reliable Roof Replacement Across Northridge
Roof replacement in Northridge runs roughly $8,500 to $22,000 for a typical single-story home, depending on size, pitch, decking condition, and material grade. Most full tear-offs take three to five working days once permitting clears. If you’re in 91324, 91325, 91327, 91328, 91329, or 91330 and your roof is at the end of its life, we’ll walk you through exactly what it needs before you spend a dollar. Call (877) 755-4274 to schedule a roof inspection first. That’s how every job starts at Weathervane Roof Repair.
We work across Northridge constantly, from the ranch tracts off Reseda Boulevard to the rebuilt neighborhoods near Northridge Fashion Center and the flat-roof additions around CSUN. The roofs here aren’t like roofs in Santa Monica or Burbank. They fail differently. We scope them differently because of it.
Why Weathervane Roof Repair Is Northridge’s Preferred Roof Replacement Company
Northridge homeowners ask us the same question on nearly every call: “Do I actually need a full replacement, or can this be repaired?” That question is exactly why people call us instead of a general contractor. We’re roof-only. Our entire service line is inspection, repair, and replacement. We don’t sell siding, windows, or gutters. We sell one thing: the truth about your roof.
Gil Tanner built Weathervane Roof Repair on a repair-first philosophy. When a Northridge roof has five years left in it, we say so and write the repair estimate. When it’s gone, we show you the decking photos and explain why replacement beats another patch. No scare tactics. No 3D-rendered sales binder. Just a straight answer.
We carry material knowledge across seven major shingle brands: GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. That matters in Northridge because the right shingle for a 1960s ranch on a flat, sun-baked lot off Devonshire Street isn’t automatically the right shingle for a two-story rebuild near Lassen Street. We match product to exposure, deck condition, and budget. Not to a vendor kickback.
Styles & brands we work with
Asphalt Shingle Roof Replacement in Northridge
Asphalt shingle roof replacement in Northridge is the most common full re-roof we do, and for good reason. The housing stock skews 1950s-to-1970s single-story tract ranches, almost all of them originally built with asphalt shingles over plywood decking. After 30 to 45 years of Valley sun, those shingles don’t wash away. They bake. They crack. They curl at the edges and lose granule bonds along the south and west exposures first.
A full tear-off and asphalt shingle replacement in Northridge typically runs $8,500 to $15,500 for an average 1,400 to 2,000 square-foot ranch. That assumes decking is mostly sound. When we get up there and find compromised sheathing from earthquake settling or an old patch job, the price moves. We’ll show you exactly where and why before adding a dollar to the quote.
Architectural Shingles for Valley Heat
Architectural shingles hold up better under sustained UV than three-tab, and most Northridge homeowners choose them once they see the price difference is modest. CertainTeed Landmark and GAF Timberline are the two we stock most for this area. Owens Corning Duration also gets pulled regularly. All three handle the expansion and contraction cycles that crack cheaper shingles along seams.
Decking Replacement Before the New Layer
We won’t lay new shingles over rotted or compromised decking. Northridge has a specific problem here. Many roofs were patched after the 1994 earthquake, and those patches weren’t always tied into the original decking plane. We find mixed sheathing thicknesses and warped seams more often here than anywhere else we work. New shingles can’t fix a bad substrate. We replace the bad sections first, then the shingle layer goes down uniform.
New Roof Installation in Northridge
New roof installation in Northridge covers two distinct situations: a full replacement on a home that has never been re-roofed, and a roof on a new structure like an addition, detached garage, ADU, or shop. The 91325 and 91324 neighborhoods are full of first-replacement roofs still wearing original or second-layer shingles from the 1960s and 70s. Those are full tear-offs by definition.
A new roof installation on a typical Northridge ranch runs $9,000 to $18,000, depending on square footage, decking repairs, and whether we’re adding a ridge vent, intake venting, or edge metal. New construction and ADU roofs run $12,000 to $22,000 because they require full sheathing, underlayment, and often both county and city inspection sign-offs.
New Construction and ADU Roofing
Northridge has a lot of detached ADU and garage conversion work, especially on larger lots east of Reseda and south of Nordhoff. New construction roofing isn’t the same as a re-roof. We’re working from bare rafters, so decking thickness matters, shear nailing matters for seismic code, and the underlayment choice changes how the roof breathes. We pull permits and coordinate with your inspector. No shortcuts on new builds.
Flat Roofing Systems
A large share of Northridge’s flat roofs sit on apartment additions and older homes near CSUN in 91330. Built-up and modified bitumen systems dominate. These roofs fail from ponding and UV-separated flashing seams, not from rain. We inspect membrane condition before recommending a coating or a full re-cover. A new flat roof here usually lands between $10,000 and $18,000, with the higher end reflecting re-decking and better insulation.
See the difference
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After
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After
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AfterTrusted Brands We Service in Northridge
We’re not married to one manufacturer. That’s the point. A Northridge homeowner with a west-facing ranch roof should get a different recommendation than a homeowner with a shaded, low-slope addition. We stock and install GAF, CertainTeed, Owens Corning, IKO, Atlas, Tamko, and Boral. For most Northridge homes, we lean toward GAF Timberline HDZ or CertainTeed Landmark architectural shingles because they hold their granule bond in sustained heat. Owens Corning Duration works well on steeper pitches that shed heat faster. IKO and Atlas offer solid budget-tier architectural lines for homeowners who need a quality roof without maxing the budget. We keep local distributor stock in the Valley, so material lead times for Northridge jobs are short. One honest recommendation from seven brands, not a sales pitch for one.
Common Roof Replacement Problems We See in Northridge Homes
- UV-cracked shingles along thermal seams. Northridge summers push 100°F or higher for weeks at a time. Shingles expand by day and contract by night, and over 30 years, the seams crack open first. We see this on nearly every south-facing slope in 91325.
- Mixed-age shingle layers hiding bad decking. After the 1994 earthquake, many Northridge homeowners got partial roof repairs instead of full replacements. We regularly tear off two or three shingle generations, plus re-worked decking that doesn’t match the original tract plane.
- Flat roof flashing separation on CSUN-area additions. Santa Ana winds flex membrane seams, and UV degrades the adhesive. Ponding water near scuppers follows. Flat roofs in 91330 need different flashing details than the rest of the Valley.
- Wildfire ember exposure on the northern edge. Homes near the foothills of 91327 and the open lots north of the 118 face ember intrusion risk during Santa Ana events. Replacement is the right time to upgrade to Class A-rated shingles and close soffit gaps.
Pricing for Roof Replacement in Northridge, CA
Here’s what Northridge homeowners actually pay. A standard architectural shingle tear-off on a 1,500-to-1,800 square foot ranch runs $9,500 to $14,000. Add $1,800 to $4,500 if decking replacement is needed, which it is on maybe 40% of the post-1994 patched roofs we open. Flat roof replacements run $10,000 to $18,000. New construction and ADU roofs start around $12,000. Tile and premium standing seam go higher, but only a small share of Northridge homes carry them.
Every job starts with a free roof inspection. We’ll walk the roof with you if you want, show you what we found, and hand you a written line-item quote. The price on that quote is the price. Call (877) 755-4274 to schedule yours.
Serving Northridge, CA — Our Local Coverage Area
We’re based in the Northridge area and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
Why Northridge Roofs Fail Differently
Northridge sits in the hottest, driest band of the San Fernando Valley. That’s not a pleasantry. It’s the core reason roofs here don’t die from rain. They die from UV degradation and thermal cycling. Asphalt shingles and flat built-up roofs cook through 100°F-plus summers, expanding in the day and contracting at night. After enough cycles, the seams open up. Granules slough off. Flashings lose their bond. The 1994 earthquake added another variable no other Valley city inherited: entire neighborhoods rebuilt in a hurry, with patch-and-replace roof histories and added structural ties that created uneven planes. We find re-worked decking and mixed-age shingle layers on Northridge roofs more than any other market we serve.
We recently replaced a roof on a 1960s ranch home near CSUN in 91325 where the original shingles had baked through decades of 100°F-plus summers and cracked along earthquake-settled seams. After tearing off three mismatched layers, we found re-worked decking from a post-1994 patch job, replaced the compromised sheathing, and installed GAF Timberline architectural shingles with a ridge vent to handle the intense UV and thermal cycling. The homeowner now has a uniform, properly vented roof that can handle both the Valley heat and any future seismic settling.
That’s what Gil Tanner and our Roof Replacement crew do in Northridge. We read the roof’s history before we write the answer. Some roofs need a repair. Some need a full replacement. We’ll tell you which one, with photos and a straight recommendation.