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CertainTeed Home Additions & ADU: The Woodland Hills Owner’s Guide
We install CertainTeed siding, roofing, insulation, and trim products on home additions and ADUs throughout Woodland Hills, with most projects falling between $45,000 and $130,000 fully permitted and finished. If you’re planning an attached suite, a second-story addition, or a detached ADU and want CertainTeed materials matched to your existing house, we can spec the right product lines and get you a written price before anything gets torn up. The most common call we get starts with a homeowner holding a faded siding sample or an old roofing invoice, trying to figure out if they can match what’s already on the house without redoing everything.
Which CertainTeed Models This Applies To
CertainTeed makes a broad range of exterior products, and matching the right one to your addition matters more than most people expect. For siding, the common lines we work with in Woodland Hills are Cedar Impressions, Monogram, MainStreet, and Board & Batten. Each has different panel widths, reveal depths, and locking profiles. Cedar Impressions and Monogram use different starter strips and corner posts, so you can’t mix them on the same wall and expect the seams to line up. For roofing, if your house has CertainTeed Landmark, Presidential Shake, or Grand Manor shingles, we match the color code from the original bundle wrapper, not from a photo. Sun fading in the San Fernando Valley is real: a Landmark shingle that has baked on a Woodland Hills roof for eight years is not the same color as the new bundle with the same code. We order from the same distributor and, where the fade is significant, we’ll talk you through blending courses rather than patching a visible square.
Mason Remodeling Co Woodland Hills is an independent contractor and not affiliated with CertainTeed. We also work with KraftMaid, Cambria, and Silestone when the interior side of the addition calls for it.
Styles & brands we work with
Signs Your CertainTeed Home Additions & ADU Is Failing
- Warped or buckling siding panels near the ground. In Woodland Hills, sprinkler overspray and the occasional heavy winter rain soak the bottom courses. CertainTeed polymer and fiber cement siding holds up well, but if the starter strip was installed tight to grade, moisture wicks up and the panels start to bow within a few seasons.
- Shingle granules collecting in gutters or at downspout elbows. CertainTeed asphalt shingles shed granules as the surface ages. Heavy granule loss on a roof that’s under ten years old usually means a ventilation problem, not a product defect. Valley heat accelerates it.
- Gaps opening at corner posts or J-channel. Siding expands and contracts with temperature swings between Woodland Hills summer days and cool winter nights. If trim was nailed too tight, the nails pull and gaps open. Caulk is a band-aid; the correct fix is releasing the panel and re-fastening.
- Soft spots in eaves or rake boards. CertainTeed siding and trim won’t rot, but the lumber behind it will if flashing was skipped. We see it often on additions built by crews rushing to close walls before inspection.
- Uneven rooflines where the addition meets the original house. This shows up years later as a visible dip or hump in the shingle line at the transition. It’s a framing or flashing issue under the CertainTeed product, and it gets worse every rainy season.
See the difference
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After
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AfterReplacement Cost & What’s Included
A full home addition or ADU in Woodland Hills runs $45,000 to $130,000 depending on square footage, foundation work, utility connections, and finish level. For the CertainTeed portion specifically, re-siding a 400-square-foot ADU in Monogram runs roughly $8,000 to $15,000 installed. A new CertainTeed Landmark roof on that same ADU lands between $5,000 and $12,000. If you’re matching siding or roofing on an existing home at the same time, the range widens with the roof or wall area. Every quote we write is a line-item price, delivered before work starts. It includes tear-off, disposal, flashing, trim, fasteners, and the CertainTeed product itself. Our workmanship warranty runs 365 days from completion: if something we installed fails in that window, we come back and fix it at no charge. The CertainTeed manufacturer warranty on the material covers its own terms, which we’ll give you in writing.
DIY or Call Us?
You can check a few things on your own. Look at the bottom edge of your siding for paint bubbling or soft wood behind it. Check attic ventilation: if the upper roof feels like an oven in July, that’s a lifespan issue for any shingle, CertainTeed included. But once you’re past inspection, this is not weekend work. Siding and roofing on a home addition involves ladders, nail guns, flashing details, and material handling that puts people in the hospital every year. A friend of mine who spent years on Valley roofs put it plainly: the fall isn’t the risk, it’s the false confidence on the second story. If you suspect the failure is widespread, call (831) 290-6866 and we’ll send someone out to look. The estimate is free and the price you get is the price you’ll pay.
FAQs
CertainTeed vinyl and polymer siding typically lasts 30 to 40 years, and Landmark shingles carry 30-year to lifetime coverage depending on the line, but actual lifespan in Woodland Hills runs 18 to 25 years for shingle roofs because of heat and sun exposure. Surfaces that face south or west age faster than north-facing elevations.
Yes, in many cases we can remove and replace individual siding panels or patch a shingle section, but color matching is the constraint. If the product has been on the house more than five years, a patch may be visible. For additions, we’ll tell you honestly whether blending or full replacement is the better spend before you commit.
Re-roofing a typical 400-to-600-square-foot ADU in Woodland Hills takes 2 to 3 working days. Re-siding the same structure runs 3 to 5 days depending on trim complexity. Larger additions or matching an existing home can extend to a week or more. We give you a schedule in writing with the price.
We keep common CertainTeed accessory stock on hand: starter strips, J-channel, corner posts, and roof underlayment for typical Woodland Hills jobs. Siding panels and shingle bundles are ordered per job to match your specific color and profile. Ordering typically adds 3 to 7 business days to the schedule.
If you’re ready to get a real number, call (831) 290-6866. Tell me what you need done. I’ll tell you what it takes and what it costs. Then we get to work.
Written by Isaac Pruett, Owner, Mason Remodeling Co – Woodland Hills, CA at Mason Remodeling Co Woodland Hills, serving Woodland Hills and nearby areas.
