Free roof inspection with deck photos before we talk money - GAF and Owens Corning certified installation
Before
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AfterFast, Reliable Roof Installation Across Stevenson Ranch
A full roof installation in Stevenson Ranch runs $14,000 – $28,000 for a standard concrete tile roof on a 2,200 – 3,200 sq ft tract home, and the job usually takes 7 – 14 days once permits are issued. Most of that cost is not the tile you can see. It’s the underlayment, decking repairs, and fire-rated assembly underneath. If you’re seeing ceiling stains but your tiles look fine, call us at (743) 200-8347 and we’ll walk you through what’s actually happening on your roof.
Grant Whitlock and the Mercer Roofing crew have torn off enough Stevenson Ranch tile to know exactly what’s underneath it: cracked felt, soft decking, and mortar that’s been loosened by Santa Ana winds funneling through the Newhall Pass. We price the job with that reality in mind, not with a low number that changes once the tile comes off.
Key Takeaways for Stevenson Ranch Homeowners
- A full re-roof in Stevenson Ranch legally requires Class A fire-rated materials because the entire community sits inside LA County’s Very High Fire Hazard Severity Zone.
- The felt underlayment fails long before the concrete tile does on 20 – 30 year old homes, so a “roof installation” here is often really an underlayment replacement job.
- Written price before any work starts. If the decking or framing turns out to be bad, we price the fix and get your approval in writing before touching it.
- Every technician is background-checked, uniformed, and photo-badged. We send their name and photo before they arrive.
Why Mercer Roofing Is Stevenson Ranch’s Preferred Roof Installation Company
Stevenson Ranch is a tight set of neighborhoods, and the roofs here are almost identical. Built between 1991 and 2006 under HOA design standards that mandate concrete tile, nearly every home carries the same S-tile or flat tile system. That uniformity means we walk onto your job already knowing what we’ll find: original felt underlayment that’s been UV-degraded on south and west exposures, mortar beds that have cracked through a dozen Santa Ana wind seasons, and tile that still looks strong from the curb but is doing very little to keep water out.
Our reputation across Stevenson Ranch is built on that local knowledge. Homeowners along the western ridgelines near the Santa Susana foothills know the drill: after every significant wind advisory, ridge caps and hip tiles get dislodged, and if they’re not re-seated before the next rain, water tracks straight onto aging underlayment. We keep matching tile and mortar stocked for the seasonal call-surge, and we dispatch crews who know the streets we serve.
Mercer Roofing is part of the Threshold Group family, founded in 2000. Every technician carries a photo ID badge, arrives in a clean marked uniform, and gets sent to your door as a name and photo before they ever knock. That’s the Threshold Standard, and it’s contractually enforced on every independently owned location.
Tile Roof in Stevenson Ranch
Tile roof work in Stevenson Ranch is rarely about the tile itself. The concrete S-tile and flat tile installed across this community was built to last 50 years, but the felt underlayment beneath it was never meant to go past 25. On a 1998 tract home near the western ridgeline, our crew pulled the original S-tile after a Santa Ana wind event had dislodged hip tiles and mortar. The tile looked fine. The underlayment had dried and cracked across the south-facing planes, and the decking had soft spots we only found after tear-off. We replaced the failed underlayment with fire-resistant material meeting the Class A standard, sistered the compromised framing, and re-set the tiles with new mortar and a ridge vent. Every step was priced and approved in writing before we touched the decking.
A tile roof installation in Stevenson Ranch runs $9 – $14 per square foot removed and replaced, which covers tear-off, new underlayment, decking inspection, and re-setting tile. If your tile is being re-used, that’s cheaper than buying new. If your HOA requires matching new tile, we quote the brand and profile line-item so you’re not guessing.
Underlayment Replacement Before Tile Replacement
The defining roofing problem in Stevenson Ranch is hidden leak pathways. The tiles look intact from the curb, but the original felt has been UV-degraded, dried out, and cracked. Water gets through the tile gaps, hits the failed underlayment, and shows up as a ceiling stain after the next rain. Most “roof installations” here are really underlayment replacements with the tile lifted and re-set.
Fire-Rated Assembly Requirements
Because the entire community sits inside LA County’s Very High Fire Hazard Severity Zone, any significant repair or full re-roof is legally a Class A fire-rated job. That means the underlayment must be fire-resistant, not standard felt. We treat that as the minimum standard on every Stevenson Ranch job, and it’s written into the quote. If a bid comes in without that line item, it’s not a legal re-roof for this community.
Roof Ventilation in Stevenson Ranch
Roof ventilation in Stevenson Ranch matters more than in most valley-floor neighborhoods because summer temperatures regularly exceed 100°F, and the original tract homes here were built with minimal ridge and soffit venting. That superheated attic air accelerates underlayment degradation, cooks the sealants on south and west exposures, and pushes heat into the living space below. When we install a roof in Stevenson Ranch, we check the ventilation math before we close the decking.
Adding or upgrading roof ventilation during a re-roof costs $900 – $2,400 depending on the linear feet of ridge vent, the number of existing soffit vents, and whether any intake needs to be opened. It’s the cheapest part of the job relative to the damage it prevents.
Ridge Vent and Intake Balance
A Stevenson Ranch attic needs balanced airflow: intake at the soffits, exhaust at the ridge. If the original build only has a few static caps, the attic never exhausts properly, and that’s why the south-facing underlayment fails faster than the north. We measure the ratio and install ridge vent plus additional soffit intake if the math doesn’t work.
When Santa Ana Winds Stress the Ventilation System
Newhall Pass funnels wind through Stevenson Ranch’s exposed hillside lots, and that wind pulls ridge caps loose, cracks mortar, and can even lift ridge vent if it’s not mechanically fastened. We see it after every major wind advisory. A properly installed ridge vent with the right fastening pattern holds through the wind season. A cheap vent with nails alone doesn’t.
Trusted Brands We Service in Stevenson Ranch
We install and repair roofs using manufacturer-recognized materials, including GAF, CertainTeed, and Owens Corning for underlayment, ventilation, and flashing components, plus Atlas, Tamko, and Boral for tile and shingle systems where the HOA or homeowner specifies a particular brand. Because Stevenson Ranch is concrete tile territory, most of what we stock locally is matching S-tile and flat tile, fire-rated underlayment rolls, ridge vent, and the mortar and sealants specific to this community’s roof assemblies. Stocking local means we’re not waiting on a supplier run across the valley to get your job moving.
Common Roof Installation Problems We See in Stevenson Ranch Homes
- Hidden underlayment failure. The concrete tile looks fine, but the original felt underlayment has cracked and dried out. Water tracks through, hits the decking, and shows up as a ceiling stain after rain.
- Santa Ana wind damage on exposed lots. Ridge caps, hip tiles, and mortar beds get dislodged or cracked by wind funneling through the Newhall Pass. If displaced tiles aren’t re-seated before the next rain, water goes straight onto aging underlayment.
- Soft decking discovered only at tear-off. We’ve never seen a 20 – 30 year old Stevenson Ranch roof come off without at least some soft or compromised plywood underneath. The HOA doesn’t see it. The home inspector doesn’t see it. Our crew finds it the day we pull the tile.
- Non-compliant HOA materials. The HOA design standards mandate concrete tile community-wide. Homeowners who switch to a different material without approval end up paying twice: once for the install, once to tear it off and redo it with compliant S-tile or flat tile.
Pricing for Roof Installation in Stevenson Ranch, CA
A full roof installation in Stevenson Ranch runs $14,000 – $28,000 for a typical 2,200 – 3,200 sq ft tract home. That range covers tear-off of the existing concrete tile, replacement of the old felt with fire-rated Class A underlayment, decking inspection and typical repair, and re-setting or replacing the tile. If your decking is significantly compromised, that adds $1,800 – $4,500 depending on how many sheets need replacing. If you’re adding or upgrading venting, budget $900 – $2,400. We write every line item before work starts, and if the tear-off reveals something the quote didn’t include, we stop, show you the issue, and get written approval before we touch it. Call (743) 200-8347 for a free estimate.
We Also Serve Cities Near Stevenson Ranch
Mercer Roofing serves Roof Installation across the western Santa Clarita Valley. If you’re in Newhall, Valencia, Santa Clarita, or Castaic, our crews make the short drive from Stevenson Ranch daily. The roof systems in those communities are similar, but the fire-rated requirements and wind exposure patterns differ, so a Stevenson Ranch quote doesn’t automatically translate.
Serving Stevenson Ranch, CA - Our Local Coverage Area
We’re based in the Stevenson Ranch 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 Installation in Stevenson Ranch
Because the tiles aren’t the waterproof layer. The felt underlayment underneath is. On most Stevenson Ranch homes built between 1991 and 2006, that original underlayment has been UV-degraded and dried out for years. Water passes through the tile gaps, hits the failed underlayment, and migrates to a decking seam or nail hole, then shows up as a ceiling stain. The fix is lifting the tile, replacing the underlayment with fire-rated material, and re-setting the tile. Call (743) 200-8347 and we’ll inspect before you see water where you shouldn’t.
Yes. The entire community sits inside LA County’s Very High Fire Hazard Severity Zone, which legally requires Class A fire-rated roofing materials and fire-resistant underlayment for any full re-roof or significant repair. It’s not a preference or an upsell. A bid without that line item is not a compliant bid for Stevenson Ranch. Call (743) 200-8347 if you want us to review a quote you’ve already received.
If your home sits on an exposed hillside lot or the western ridgeline near the Santa Susana foothills, most likely yes. The Newhall Pass funnels Santa Ana winds directly at those exposures, and ridge caps are the first thing to crack or lift. A displaced ridge cap lets water straight onto the underlayment. The mortar bed breaks down a little more every wind season, so an inspection now is cheaper than a re-mortar plus decking repair after a rainy winter. Call (743) 200-8347 and we’ll check the ridge line before the next wind event.
It should include a written allowance for decking and framing repair, and a written process for how surprise findings get priced. On a 20 – 30 year old Stevenson Ranch roof, some soft decking is nearly guaranteed. The quote should say what the per-sheet replacement cost is, what the labor rate is for sistering framing, and that no additional work starts without your written approval. We write that into every contract before we start. If another bid won’t put that in writing, call (743) 200-8347 instead.
Compare the underlayment, not the tile. Both bids will quote concrete tile. The question is what’s underneath it. Is the underlayment fire-rated Class A material or standard felt? Is there a written decking allowance, and what’s the per-sheet price? Does the quote include venting or does the roofer plan to leave the original soffit and ridge setup untouched? Does the bid include a written guarantee and who shows up at the door? The cheapest bid on a Stevenson Ranch re-roof is usually the one that skipped the underlayment and decking allowances. Call (743) 200-8347 and we’ll walk you through a line-by-line comparison.
Your roof in Stevenson Ranch is not a tile job. It’s an underlayment and fire-rated assembly job, with decking and framing surprises waiting underneath. That’s the work we do, and we put every price and guarantee in writing before we start. Call (743) 200-8347 to schedule your free estimate.
Written by Grant Whitlock, Owner at Mercer Roofing, serving Stevenson Ranch and the western Santa Clarita Valley since 2000.