Kitchen remodeling
Bathroom remodeling
Home additions & ADU
Roofing
Windows & doors
Driveway & pavers
FenceFree written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Cover Construction in Ontario, CA | Timberline Contractors
We provide independent Cover construction service across Ontario, CA – kitchen and bath cabinetry, quartz and solid-surface tops, shower surrounds, and roofing. The thing that makes Cover work different here is the housing stock: most of Ontario’s homes are 1950s – 70s tract builds where walls were never flattened after the original re-stucco, so cabinet runs and countertops fail from the substrate out, not the finish in. Nelson Fung and our crew at Timberline Contractors handle the structure behind the Cover product before we hang a single door. If you’re in 91758, 91761, 91762, or 91764, call (866) 253-5808 for a free estimate.

Why Ontario Residents Choose Us for Cover Service
What you need in Ontario is someone who knows Cover’s model lines and knows what a 1962 stucco tract house hides behind its drywall. We do both. Nelson grew up in Los Angeles, learned the trade at LATTC, and spent years on everything from Eastside bungalow remodels to mid-size commercial builds before running Timberline. That dual background matters here because Ontario is one of the few cities where a contractor’s calendar carries warehouse tenant improvements and 1950s tract remodels in the same week. We quote the cover-up work before we touch the cabinets, not after. We’re an independent Cover service provider – not manufacturer-affiliated or authorized – which means our recommendations are based on what your house actually needs, not what a brand rep wants sold this quarter. Cover sales & service is a core part of what we do, but the house comes first.
Our work across Ontario service area keeps coming back to one pattern: original aluminum wiring, thin clay sewer laterals, stucco over plaster over lath, and slabs that have moved more than anyone wants to admit. If your Cover cabinets bind or your quartz seam opens, the problem is rarely the product. It’s what’s under it. That’s the repair we do.
Styles & brands we work with







Common Cover Construction Problems We Solve in Ontario
- Cabinet boxes and drawer glides binding after re-stucco. Mid-century Ontario walls were often re-stuccoed over the original lath without ever being re-flattened. Cover cabinet runs installed against those walls rack out of square, and drawer glides bind or swell. We strip the run back, flatten the wall to the cabinet’s tolerance, and re-hang with factory-matched Cover hardware.
- Quartz seams and edge profiles cracking over moved slabs. If a Cover quartz counter was shimmed over a slab that shifted rather than leveled to it, the seam and the profile edge are the first places to give. We see this constantly in 1950s tract homes where the slab has settled unevenly near the original girder lines. We level the base cabinets to the slab before we set a new top.
- Cover shower pans leaking at the curb in older baths. Original Ontario bathrooms often ran clay laterals with thin slabs, leaving no room for a proper pan pre-slope under a Cover shower surround. Water sits at the curb, the pan degrades, and you get a leak that shows up on the ceiling below. Repair means pulling the pan, correcting the slope where possible, and re-setting the surround with proper waterproofing.
- Cover roof panels and tile flashings lifting after Santa Ana wind events. Ontario sits in the path of Santa Ana winds that hit the windward elevation hard. If the old roof deck was never renailed, Cover panels and tile flashings lift right where the wind catches them. We re-secure the deck, replace the flashings with factory-matched profiles, and re-set the panels.
- Cover cabinet runs that were never checked against the wall before cutting. In the older core near downtown Ontario, exterior walls frequently have no sheathing behind the re-stucco – just plaster over lath over studs. A knuckle test before cutting saves you from hitting conduit or plumbing that’s running where nobody expected it. Our crew does this on every Cover install, because we’ve already made the mistake of skipping it once.
Cover Service in Ontario: What Local Conditions Mean for Your Equipment
Ontario sits at the junction of the 10, 60, and 15 freeways, which makes it a warehousing and logistics build-out hub as much as a residential remodeling market. That dual reality shapes how Cover repair in Montclair and Ontario work gets done here. The same crew calendar that carries a concrete tilt-up tenant improvement in the industrial corridor also carries a 1958 kitchen remodel in the older single-family core – because both exist inside the same four ZIP codes. For a Cover owner, that means your project gets planned around logistics traffic, not just your schedule. Our concrete deliveries for a slab fix, dumpster placement for a kitchen tear-out, and material staging for a roof all have to account for the truck queues that form near the freeway interchanges, especially during peak distribution hours. A contractor who only does residential work in Ontario won’t think about that until the delivery shows up forty minutes late. We plan for it. And there’s a secondary effect: the construction labor pool here is split between warehouse work and residential trades, so the crews who stay in residential are the ones who actually want to be there. That’s the crew you want setting your Cover cabinets.
We were called to a 1958 stucco tract house in the older core near downtown Ontario for Upland Cover service and a Cover kitchen that had been “finished” twice. The cabinets were shimmed over an unlevel slab and the quartz counter seam had cracked. Our tech knuckle-tested the exterior wall before cutting, found no sheathing behind the re-stucco, reframed and flattened the cabinet run to the slab, replaced the failed Cover drawer glide set, and set a new Cover quartz top with a properly supported seam. No callbacks since. Do it right the first time or explain yourself twice.
Cover Models & Products We Service in Ontario
We service Cover’s semi-custom framed cabinetry lines, the ones that show up in Ontario infill remodels and older-home kitchen replacements. That includes Cover quartz and solid-surface countertops, Cover shower and tub-surround systems, and Cover roofing lines – standing seam metal and tile profiles both. On anything that carries the Cover finish or warranty story, we specify OEM or factory-matched components: cabinet hardware, glass, panel profiles, tile flashings. Hidden rough-in and fasteners, we use known-quality aftermarket where it’s equal or better. If a Cover cabinet run or roof section is salvageable with new hardware, glass, or flashing, we repair it. We only recommend full replacement when the substrate or decking under it has failed – because replacing a Cover cabinet over a bad wall is just installing a future callback.
For fast turnaround in Ontario, we keep common Cover hardware and flashing profiles stocked locally, which means a drawer glide replacement or a wind-lifted flashing doesn’t have to wait on a factory order.
See the difference
Before
After
Before
After
Before
AfterCover Service Pricing in Ontario
Cover construction pricing in Ontario lands within these ranges. What drives the cost is less the Cover product than what’s behind it: a wall that needs flattening, a slab that needs leveling, or a roof deck that needs renailing before Cover service in Chino or Ontario panels go back on. A free estimate from us includes that structural assessment, so the number we give you is the number attached to work that will actually hold.

| Service | Price Range |
|---|---|
| Full Kitchen Remodel (Cover cabinetry + quartz) | $14,000 – $45,000 |
| Cabinet Installation | $4,000 – $13,000 |
| Countertop Installation | $2,000 – $6,500 |
| Walk-In Shower Installation | $4,500 – $12,000 |
| Tub-to-Shower Conversion | $3,500 – $10,000 |
| Roof Replacement | $8,000 – $20,000 |
| Roof Repair | $400 – $1,800 |
| Metal Roof Installation (standing seam) | $15,000 – $40,000 |
Call (866) 253-5808 and we’ll put a real number on your Cover project in Ontario – estimates are free, and we’ll tell you if a repair makes more sense than a replacement.
Serving Ontario, CA — Our Local Coverage Area
We’re based in the Ontario area and offer San Antonio Heights Cover service, and know this community well. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Cover Construction in Ontario
Most of the time, yes – but only if we flatten the wall first. Cover’s semi-custom framed lines are built to tight tolerances, and a 1960s tract wall that was re-stuccoed over the original lath is rarely flat enough to accept the run without binding. We check the wall before we order or cut anything, and we quote any flattening work up front. Call (866) 253-5808 and we’ll tell you what your specific wall needs.
Because the original clay lateral and thin slab often left no room for a proper pan pre-slope, so water never drains the way the Cover surround was designed to handle. It pools at the curb, the pan degrades, and eventually you get a leak. The fix is correcting the slope where possible and re-setting the surround with proper waterproofing, not just caulking the curb again.
Yes, and it’s predictable. Cover panels and tile flashings lift at the windward elevation when Santa Ana winds hit, especially where an old roof deck was never renailed. We look at the decking before we blame the panels – if the deck has movement, new Cover roofing won’t solve the lift. Repair or replacement depends on what we find underneath.
Yes. We specify OEM or factory-matched Cover components for anything that carries the brand’s finish – cabinet hardware, glass, panel profiles, quartz edge details – so a partial remodel doesn’t look patched. If the existing Cover run is salvageable, we repair it with matched parts rather than pushing a full replacement.
Ontario’s position at the 10/60/15 junction means truck traffic near the interchanges can delay material deliveries and concrete pours, especially during distribution peak hours. We plan staging and delivery windows around that reality, and we build buffer into the schedule for it. For an exact timeline on your Cover project, call (866) 253-5808 – it costs nothing to ask.
Service Areas Near Ontario
We cover Cover service across Ontario’s four ZIP codes – 91758, 91761, 91762, and 91764 – and in nearby communities where the same mid-century housing patterns show up. That includes Cover service in Stanton and Cover service in Rancho Cucamonga, where the tract-home era produced similar wall and slab conditions. If you’re in a neighboring city and wondering whether we make the drive, call and ask.
Book Your Cover Service in Ontario Today
If your Cover cabinets, countertops, shower, or roof are showing signs of failure in Ontario, don’t wait for the problem to spread into the structure behind it. Call Timberline Contractors at (866) 253-5808 to schedule your free estimate. Nelson and our crew will tell you exactly what’s wrong, what it costs, and what’s worth fixing first.
Written by Nelson Fung, Owner & General Contractor at Timberline Contractors, serving Ontario since our first tract-home remodel in the city.