Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Unilock Roofing: The West Covina Owner’s Guide
If you’re searching for Unilock roofing parts in West Covina, here’s the straight answer: we stock and install Unilock-compatible roofing components, with most repairs running $400 – $1,800 and full replacements between $8,000 – $20,000 depending on scope. Most owners discover a problem after a storm when they spot a lifted edge in the morning light, or when a drip shows up on the ceiling near the wall line. You should know what you’re getting before we ever pick up a tool. We’ll match the exact profile, explain what failed, and give you a written price before any work starts.
We’re an independent service provider, not affiliated with Unilock directly. But we’ve worked on enough Unilock installations across West Covina to know the quirks: how certain profiles weather in our dry heat, which underlayment failures repeat, and when a sealant joint gives out before the material itself does.
Which Unilock Models This Applies To
Unilock’s roofing line includes several paver and cap profiles used on flat roofs, deck perimeters, and parapet walls across Los Angeles County. The most common in West Covina are the Mattoni, Sereno, and Courtstone cap units, along with the Uni-Stone and Brussels Block pavers that show up on roof decks and terraces. If you don’t know which line you have, check the underside of a loose piece: Unilock stamps a production code there, and the code’s first digits correspond to the series.
Here’s the compatibility gotcha most homeowners hit: Unilock changes mold dimensions between production runs, and a unit bought in 2015 may not sit flush with one manufactured in 2023, even in the same named line. The color also shifts slightly, and after years of California sun exposure, your existing pieces have faded to a different tone than anything fresh off the pallet. We measure and match to the existing installed units on site, not to a catalog photo. For replacement caps and pavers, OEM is the safe call when color match matters. For structural underlayment, fasteners, and drainage matting, quality aftermarket equivalents perform as well and often cost 20 – 30% less. We’ll quote both ways and explain the tradeoff in plain language.
Styles & brands we work with
Signs Your Unilock Roofing Is Failing
- Pooling water that lingers 48+ hours after rain. Flat roof areas over Unilock pavers need positive drainage. If water sits, the mortar or sand joints are breaking down and the surface is starting to hold moisture against the membrane.
- Cracks running across multiple units in a line. This usually means movement below the surface – a settling deck substrate or an expansion joint that was skipped during installation. Patching the cracked unit won’t stop the next one from cracking.
- Loose or rocking pavers near the parapet or roof edge. The edge restraint has failed. Water gets underneath, works its way into the bedding layer, and the units lose their lock. This is also where lifted pavers become a fall hazard.
- White chalky residue on the paver surface. Efflorescence is common in West Covina’s hard water conditions, but persistent buildup signals water moving through the system in the wrong direction. It means the drainage mat or weep system isn’t doing its job.
- Interior water stains on the ceiling below the roof deck. By the time the stain shows, the membrane has been compromised. The paver surface may look fine, and that’s what makes this one dangerous – the failure is underneath and spreading.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
Roof repair on Unilock surfaces in West Covina typically runs $400 – $1,800, covering anything from replacing a handful of cracked units to re-setting edge restraints and resealing joints. A full roof replacement, which includes removing the old pavers, repairing or replacing the membrane, and reinstalling with new bedding and drainage, lands between $8,000 – $20,000 depending on square footage, roof accessibility, and whether the substrate itself needs work.
Here’s the breakdown of what drives the price:
| Scope | West Covina Range |
|---|---|
| Paver repair (loose/cracked units, re-setting) | $400 – $1,800 |
| Full roof replacement (membrane + paver reinstall) | $8,000 – $20,000 |
| Drainage mat replacement (under paver system) | $1,200 – $4,500 |
Every quote includes parts, labor, tear-off and disposal of the old material, and written line-item pricing before we start. No verbal estimates that grow on the final bill. If anything changes once we open the roof up, you’ll hear about it in writing before another dollar is spent. Our workmanship is covered by the 365-Day Done Right Promise: if it’s not right within a year of completion, we make it right at no cost to you.
DIY or Call Us?
Some things are worth checking yourself before you call. Walk the roof deck if it’s safe to access. Note where water pools. Check if any pavers rock underfoot. Look at the parapet caps for gaps in the sealant. You don’t need to fix anything – you just need to tell us what you see, and that helps us bring the right parts on the first trip.
What we don’t recommend is lifting pavers on a finished roof to inspect underneath. The bedding layer and membrane sit right below the surface, and one wrong pry can tear the waterproofing that’s protecting everything beneath it. If the roof is steep or the pavers are wet, stay off it entirely. Wet Unilock paver surfaces get slick, and a fall off a roof deck is not a risk worth taking. Call (707) 760-7579 and we’ll send someone who’s done this hundreds of times across West Covina, with a name and photo to your phone before they arrive.
FAQs
A properly installed Unilock paver roof system lasts 25 – 40 years in our climate, but the membrane underneath typically needs attention at the 15 – 20 year mark, even when the pavers themselves still look solid. Our dry heat and UV exposure wear sealants faster than coastal climates. Call (707) 760-7579 for an inspection if your roof is approaching that age.
Yes. Isolated cracks and loose units can be replaced individually, and edge restraints can be re-set without touching the rest of the roof. The repair-versus-replace decision comes down to what’s underneath. If the membrane is intact, repair makes sense. We’ll tell you what we find and give you both options in writing. Estimates are free.
Most paver repairs and edge re-setting jobs finish in a single day. Full roof replacements over Unilock surfaces typically run three to seven days depending on the square footage and whether the substrate needs work. We schedule the work and tell you the timeline up front – if it changes, you’ll know before it does.
We keep common Unilock cap profiles, bedding sand, drainage matting, and edge restraint materials on the truck for the lines most commonly installed in West Covina. Unusual profiles or old production runs may require a short order from the supplier, and we’ll tell you that timeline before any work is scheduled. We also carry parts for other brands we service, including KraftMaid cabinetry and Cambria and Silestone countertop surfaces.
Written by Isaac Pruett, Owner, Mason Remodeling Co West Covina at Mason Remodeling Co West Covina, serving West Covina and nearby areas.
