Natural Welsh and Vermont slate, plus synthetic slate alternatives for estate-class homes across the North Shore and Lake County. Slate is the longest-lived roofing material commonly available — properly installed slate roofs deliver 75 to 150+ years of service. We install, restore, and replace slate roofs on Tudor Revivals, Colonial Revivals, and historic homes in Lake Forest, Winnetka, Kenilworth, Glencoe, Highland Park, and the surrounding estate communities.
Slate is a generational specification. The slate itself outlasts every other component of the roof — what fails on a slate roof is almost always the flashing, the fasteners, or the substrate, not the slate. This makes slate restoration economically distinct from other roofing work: a slate roof that looks distressed at 80 years old often has slate inventory that's still good for another 50, while the copper flashing has reached end-of-life. Knowing the difference between slate that needs replacement and slate that needs restoration is the most important judgment a slate contractor brings.
For homes where the architecture calls for slate — and where the structure was originally specified for it, or can be reinforced to support it — natural slate is the right material. For homes that need the slate aesthetic without the weight, cost, or fragility profile of natural slate, the synthetic alternatives (DaVinci Roofscapes, Brava, EcoStar, CertainTeed Symphony) deliver visually similar results at roughly half the installed cost with much simpler maintenance. We work in both. The right call depends on the home, the substrate, and the ownership horizon.
Slate work is specification work. The slate type, the grade, the fastening method, the flashing material, and the underlayment all matter individually and matter together. We work in the natural and synthetic systems that perform best in Illinois climate.
Welsh slate is the historic specification for many Tudor Revival and Colonial Revival homes on the North Shore. Welsh grey and Welsh blue-black are denser and harder than most North American slate, with multi-century track records on premier estate properties. The original Welsh slate quarries in Penrhyn and Cwt-y-Bugail still produce. For restoration projects on homes originally specified with Welsh slate, we source matching material; for new specifications, Welsh slate is the appropriate first choice on heritage-architecture homes.
Vermont unfading green, unfading purple, unfading mottled green and purple, and Vermont semi-weathering grey-black are the premium domestic slate options. "Unfading" is a quarry-graded designation indicating the slate is highly weather-stable and will retain its original color over the full life of the installation. Vermont slate is widely available, performs comparably to Welsh slate in most applications, and is generally less expensive than imported Welsh material. It's our most-specified natural slate for new estate-home installations.
The economical domestic option. Pennsylvania black slate is appropriate for some historic properties (it's the original specification on many Pennsylvania-area imports of historic architecture into the Chicago area in the early 1900s) and serves as a value option in synthetic-transition projects. We use it selectively, and we're transparent about its grade differences from Welsh and Vermont stock.
DaVinci's Multi-Width Slate is our most-installed synthetic slate. It's a molded polymer in five widths and a varied surface texture that produces a convincing natural-slate aesthetic at roughly 40% of natural slate cost and ~25% of natural slate weight. Class A fire rating, 50-year warranty, available in colors that match Welsh, Vermont, and Pennsylvania natural slate. DaVinci is appropriate for estate homes where the natural slate look is wanted but the structural or budget profile of natural slate isn't workable — and for retrofit projects on homes that weren't originally specified for slate.
Brava (composite polymer), EcoStar (recycled rubber and plastic), and CertainTeed Symphony are alternative synthetic slates we install when DaVinci doesn't fit a project's specific aesthetic or budget. Each has different texture profiles and color palettes. Brava is the closest tactile match to natural slate; EcoStar is the most economical credible option; Symphony has the strongest distribution through CertainTeed's network if the project is part of a broader CertainTeed system. We'll specify the right product based on the home, not based on what we install most often.
Slate roofs are flashed with copper. Aluminum and galvanized steel are not appropriate substitutes because the flashing must outlast multiple slate generations — copper develops a patina that complements the slate, lasts 80-100+ years, and can be soldered for the most demanding details. Copper valleys, step flashing, counter flashing, chimney crickets, and any standing-seam accents (bay roofs, dormers, oriels) are part of the slate scope. We fabricate copper components in-house or work with regional metal shops on custom profiles.
This is the most important decision on any aging slate roof project. Most natural slate failures we encounter are not slate failures — the slate itself is fine. What's failed is the flashing (corroded copper that's at the end of its serviceable life), the fasteners (slate hooks or nails that have rusted out), or the underlying substrate (battens or decking that's rotted from water entry through failed flashing). When the slate inventory still has 50+ years of life left and only the underlying components have failed, restoration is the right call: selectively remove slates, replace the failed components beneath, reinstall the slate (using salvaged material for any broken pieces), and bring the roof back to functional condition for another 50-75 years.
Full replacement is the right call when (a) the slate is delaminating or shedding (rare on quality Welsh and Vermont stock; more common on degraded Pennsylvania), (b) the substrate is too compromised for restoration, (c) the homeowner is transitioning to synthetic slate for weight, cost, or maintenance reasons, or (d) the original slate inventory has too many broken or missing pieces to restore credibly. We pull samples and assess each project to determine which approach makes sense. On estate-class slate roofs, restoration is often dramatically better economics than replacement — we'll tell you when that's true.
Slate work concentrates in the estate communities where the architecture and the heritage of the housing stock call for natural or synthetic slate. These are the cities we work in most frequently.
Estate homes with Welsh and Vermont natural slate inventory
Service area details →Tudor Revival and Prairie-style architecture with original slate
Service area details →Tudor and Colonial Revival estates — slate-appropriate architecture
Service area details →Lakefront and ravine homes with significant slate inventory
Service area details →Sherwood Forest, Ravinia — heritage slate roofing
Service area details →Historic in-village properties and blufftop estates
Service area details →Custom estates where slate is the architectural specification
Service area details →Multi-acre estate properties — premium-material roof systems
Service area details →Estate homes with original slate or synthetic slate transitions
Service area details →Estate-scale architecture appropriate for slate or synthetic slate
Service area details →Custom homes on rural-character lots
Service area details →Five-acre minimum lots, equestrian and estate properties
Service area details →Natural slate is the longest-lived residential roofing material commonly available — properly installed and maintained slate roofs in Illinois climate routinely deliver 75 to 150+ years of service life. The slate itself is the most durable component; on most slate roof failures we encounter, the slate is fine and the failure is at the underlying flashing, fasteners, or substrate. This is why slate restoration (re-flashing, re-fastening, replacing failed individual slates) is often economically rational even on roofs that look distressed — the slate inventory typically still has 50+ years of life left in it. Synthetic slate alternatives like DaVinci Roofscapes carry 50-year warranties and are designed to outlast standard architectural shingle systems by several multiples.
Natural slate is appropriate when (a) the home's architecture and the neighborhood's character call for it specifically — Tudor Revivals, Colonial Revivals, English country, certain Beaux Arts and historic homes, (b) the substrate can handle the weight (natural slate is ~700-1,000 lbs per 100 sqft compared to ~250 lbs for asphalt), (c) the homeowner is investing for a multi-generational ownership horizon, and (d) the budget supports it (natural slate typically runs 3-5x the installed cost of premium architectural shingles). Synthetic slate (DaVinci Roofscapes, Brava, EcoStar, CertainTeed Symphony) is appropriate when the look is desired but natural slate's weight, cost, or fragility is not workable — common scenarios include retrofit projects on substrates that weren't built for natural slate, projects in historic-aesthetic but not historic-jurisdiction neighborhoods, and projects where the lifecycle math favors synthetic at half the cost. For homes inside actual historic preservation jurisdiction (parts of Lake Forest, certain Highland Park properties, Kenilworth), natural slate may be the only approvable specification — we navigate that as part of the proposal.
We work with the slate types that perform best in Illinois climate and that are appropriate to the architectural character of the homes in our service area. Welsh slate (typically Welsh grey or Welsh blue-black) is the historic specification for many Tudor Revival and Colonial Revival homes on the North Shore — it's harder than most North American slate and carries a multi-century track record. Vermont unfading green and Vermont unfading purple are widely available premium domestic options with predictable color stability. Pennsylvania black slate is a more economical domestic option, appropriate for some historic properties and many synthetic-transition projects. We source through specialty suppliers and can match existing slate inventory on restoration projects when the original quarry is still operating. For synthetic slate, we install DaVinci Roofscapes Multi-Width Slate, Brava Slate, EcoStar Majestic Slate, and CertainTeed Symphony Slate.
Houses originally built with slate (most Tudor and Colonial Revivals from the 1900s-1940s, many estate homes) were designed for the load and structural assessment usually confirms they're still capable. Houses originally built with asphalt shingles often were not — the framing was sized for ~250 psf live load, not the ~750 psf that slate requires. Adding natural slate to a house that wasn't built for it typically requires structural reinforcement, which is a significant additional scope and cost. As part of every natural slate proposal, we either (a) confirm with available drawings or building permit records that the original specification was slate, or (b) recommend a structural review by a licensed engineer if the original specification can't be confirmed. For homes where structural reinforcement isn't desirable, synthetic slate at ~250 psf delivers the appearance without the structural lift — which is one of the most common reasons we specify synthetic over natural.
Most natural slate roof failures we encounter are not slate failures — they're failures of the underlying components. The slate itself is typically fine; the issue is at the fasteners (corroded copper or steel slate hooks), the flashing (failed copper that's exhausted its serviceable life), or the underlying battens/decking (rotted from water entry through failed flashing). Restoration involves selectively removing slates, replacing the failed components beneath, and reinstalling the slate (often the same slate, supplemented with matching salvaged material for any broken pieces). This approach can preserve a 100-year-old slate roof for another 50+ years at meaningfully lower cost than full replacement. Full replacement is the right call when the slate inventory itself is delaminating (rare on quality Welsh and Vermont slate; more common on lower-grade domestic), when the substrate is too compromised for restoration, or when the homeowner wants to transition to synthetic slate for weight or maintenance reasons. We assess each project to determine which approach makes sense — restoration is often better economics than replacement on substantial historic slate roofs.
Natural slate roof installation in Chicagoland typically runs $80,000 to $300,000+ for an estate-class home, depending on roof size, slate grade and source, complexity, copper flashing scope, and whether the project is a restoration or full replacement. A 4,000 sqft home with mid-grade Vermont slate, copper valley and step flashing, and moderate complexity falls in the $130,000 to $200,000 range. Welsh slate or premium domestic slate at the upper grades pushes higher. Synthetic slate (DaVinci, Brava, EcoStar) typically installs at 40-60% of natural slate cost — for a comparable 4,000 sqft project, $50,000 to $100,000 is a reasonable range. Restoration projects on existing slate roofs vary widely depending on scope but often run 30-50% of full-replacement cost while preserving the original slate inventory. We provide written estimates with the specific slate type, grade, source, fastening method, ply, flashing scope, and warranty terms before any commitment.
Free written assessment with material specifications, restoration vs. replacement analysis, and copper flashing scope. We'll come walk the roof and tell you what your specific home needs.