Natural Slate Roofing in St. Louis, MO
Quarried Slate · 75–150 Year Lifespan · Repair & Restoration
Residential · Natural Slate
The only roofing material rated to outlive the house — installed by craftsmen who respect that
Natural quarried slate is in a different category from every other roofing material. Vermont, Pennsylvania, Buckingham, and Spanish slate have documented lifespans of 75 to 150 years — buildings roofed in slate at the turn of the 20th century are still under original material today. In the St. Louis historic housing stock, slate roofs on pre-1940 homes are not uncommon, and preserving or restoring them with correct materials and techniques is a specialized discipline that most roofing contractors cannot or will not do correctly. Slate's weight — 800 to 1,500 pounds per square depending on thickness and origin — requires structural assessment of the deck and framing before installation. The material itself must be sorted and graded; inconsistent thickness produces uneven exposure and accelerated nail failure. Installation requires slating hooks, copper or stainless steel nails that resist corrosion over a century of service, and a systematic understanding of exposure tables and head-lap requirements for each slate variety. Revolve installs new natural slate on homes where the structural requirements are met and on additions or renovations where matching the existing slate roof is the priority. We also repair and restore existing slate roofs — replacing broken or sliding slates, re-leading valleys, repointing chimney flashings — with correct materials rather than asphalt patch products.
Why homeowners and businesses trust Revolve
Structural assessment before specification
Slate weighs 800 to 1,500 pounds per square. We assess deck and framing condition before specifying any slate installation — and are honest when structural upgrading is required and cost-prohibitive.
Correct materials, century-scale thinking
Copper or stainless steel nails, copper valley metal, and compatible mortar at flashings. Installing slate with galvanized nails or aluminum valley metal creates failure points within decades on a material rated to last a century.
Repair and restoration for existing slate
Most St. Louis slate roofs are on pre-1940 homes where the material is still sound but individual slates are sliding, breaking, or the flashings have failed. Correct repair extends the life of the existing slate — which is almost always preferable to replacement.
What we offer
New Natural Slate Installation
Vermont, Pennsylvania, or Buckingham slate installed to correct exposure and head-lap with copper or stainless hardware. For new builds and additions where longevity and aesthetics are the priority.
Slate Repair & Replacement
Individual slate replacement using salvage or new material to match the existing roof. Correct slating hooks, proper nail placement, and matching slate color and texture.
Valley Restoration
Open and closed copper valley replacement on existing slate roofs — the most common failure point on St. Louis slate roofs over 50 years old.
Chimney Flashing Restoration
Lead or copper counter-flashing and step-flashing restoration at chimneys — mortar repointing and correct flashing integration with the slate course.
Structural Assessment
Deck and framing load analysis for homes considering new slate installation. We provide a clear structural picture before any slate is specified.
Composite Slate Consultation
For homes where the structural load of natural slate is cost-prohibitive, DaVinci and Brava composite slate are honest and high-quality alternatives we also install.
Related Services
Natural Slate in St. Louis: The Architecture, the Material, and the Commitment
Natural quarried slate roofing on St. Louis homes is almost always a preservation and restoration story before it is a new-installation story. The metro's housing stock includes thousands of pre-1940 homes in neighborhoods like Lafayette Square, the Central West End, Soulard, Webster Groves, and the older sections of Clayton and Ladue where original slate roofs are still present. Many of those roofs are still sound at the primary material level — the slate itself — while the flashings, valleys, and supporting details have deteriorated or been incorrectly patched over the decades. Correct repair, not premature replacement, is the right approach for those roofs when the slate is intact.
For new installations — additions, renovations, or new construction where the architectural program requires natural slate — the material selection is a serious commitment. Natural quarried slate weighs 800 to 1,500 pounds per square depending on variety, thickness, and grading. Vermont soft-vein slate, Pennsylvania Peach Bottom slate, and Buckingham Virginia slate are the most commonly specified varieties for new US installations, each with distinct color ranges and thickness grades. The structural requirement for those loads requires engineering analysis of the roof deck and framing — for most homes not originally designed for slate, this is a real project variable.
The Difference Between Correct Slate Work and Everything Else
Slate roofing craftsmanship is a genuine specialty within the roofing trade. Most roofing contractors who say they do slate work are applying asphalt patch products to failing flashings, drilling into slate with inappropriate fasteners, and covering deteriorating valleys with granule-surface modified bitumen cap sheets. These are short-term fixes that accelerate the failure of surrounding sound slate by creating moisture traps and incompatible movement patterns at the repair boundaries.
Correct slate repair uses slating hooks for individual tile replacement — a metal hook that holds the replacement slate in the proper exposure position without nailing through the face of the slate or disturbing the overlapping courses. Replacement slate is sourced to match the existing variety, thickness, and color — salvage slate from demolition projects or matching new slate from the appropriate quarry region. Flashings are replaced with lead or copper, not aluminum or galvanized steel that corrodes within years. Valley metal is replaced with copper or terne-coated stainless. Mortar at chimney flashings is matched to the existing mortar composition to prevent differential movement cracking.
These are the standards Revolve applies to slate repair work. We also recommend pre-repair condition surveys for any significant slate project — documenting the sound versus compromised slate, mapping the valley and flashing conditions, and producing an honest assessment of what a restoration investment will yield in years of additional service life.
New Slate Installation: When It Is the Right Answer
New natural slate installation in St. Louis is the appropriate specification in a narrow set of circumstances: historic preservation projects where material authenticity is required by preservation covenant or homeowner commitment, high-value new construction where the architectural program and budget support the structural work and material cost, and additions to existing slate-roofed homes where matching the original roof is the priority.
The installed cost of new natural slate roofing is the highest of any residential roofing material — typically four to eight times the cost of architectural shingles, with the structural engineering, heavy underlayment, copper hardware, and skilled labor required for a correct installation contributing to that premium. The counterargument is the lifespan: a correctly installed Vermont slate roof, with copper hardware and properly maintained flashings, is reasonably expected to last 75 to 100 years. On a per-year cost basis over the full lifespan, natural slate's economics become competitive with asphalt shingles replaced every 25 to 30 years.
Composite Slate Alternatives: When the Right Answer is DaVinci or Brava
Revolve is honest about alternatives. For homeowners who want natural slate aesthetics on a home that cannot support natural slate's structural loading, or whose budget does not justify the natural slate premium, or who are primarily motivated by curb appeal rather than material authenticity, DaVinci Bellaforte Slate and Brava Composite Slate are excellent options that we install and stand behind.
The composite alternatives deliver Class 4 impact ratings, Class A fire ratings, and 50-year or lifetime warranties at roughly half the installed cost of natural slate, without the structural loading constraints. At street-level viewing distance, a quality composite slate installation is visually convincing on a wide range of architectural styles. The honest distinction: at close inspection and for true material authentics, natural slate has a depth and character that composite cannot fully replicate. For most homeowners, the composite is the right decision. For a specific subset of St. Louis homeowners on the right home — a pre-1940 Victorian, a formal Colonial, a historic district property — natural slate is the correct material.