Lifetime Systems
Five materials. One standard.
Every system we install is chosen for a service life measured in generations, not warranty cycles. Here is how they compare and where each one belongs.
| System | Service life | Installed weight | Fire | Impact | Maintenance |
|---|---|---|---|---|---|
| Cedar Shake | 30–40 years | ≈400 lb per square dry, ≈640 lb saturated | Class A, B or C only with fire-retardant treatment; untreated cedar carries no rating | Not rated | Periodic cleaning, moss control and treatment renewal |
| Natural Slate | 75–150+ years | 700–1,900 lb per square; ≈1,170 lb at the common ¼–⅜ inch. Structural review required | Class A. Stone does not burn | Not rated. Slate is brittle; a cracked slate is replaced individually | Occasional slate replacement; flashings and valleys are renewed long before the stone wears out |
| Synthetic Slate | 50-year limited warranty, 15 years non-prorated | ≈266–367 lb per square by profile and exposure. No structural work on standard framing | Class A (ASTM E108) | Class 4, the top UL 2218 rating | None |
| Synthetic Shake | 50-year limited warranty, 15 years non-prorated | ≈284–333 lb per square by profile and exposure. No structural work on standard framing | Class A (ASTM E108) | Class 4, the top UL 2218 rating | None |
| Designer Asphalt | Lifetime limited warranty | ≈305 lb per square architectural, up to 425 lb for the luxury grade | Class A (UL 790 / ASTM E108) | Varies by product, Class 2 to Class 4. Confirm before you rely on an insurance credit | Minimal. Keep the valleys and gutters clear |
Weights are installed dead load per roofing square, which is 100 square feet of roof. Fire and impact classes are what the material itself carries: a rating earned only through treatment or a full assembly is written that way, and where there is no rating to quote we say so rather than leave the column flattering and empty. Bring us the house and we will confirm every figure here against the specific product and the framing you have.
30–40 years
Cedar Shake
Hand-split and taper-sawn Western Red Cedar
Nothing else looks like real cedar. Heavy, hand-split shakes weather to a silver-gray patina and give a roof a depth and texture that machine-made products only imitate. Done right, with premium-grade material, proper ventilation, and breathable underlayment, cedar is a decades-long roof.
Best for
- Historic and architecturally sensitive homes
- Tudor, Craftsman, Shingle-style and lakefront properties
- Owners who want the authentic material
How we build it
- Premium and No. 1 grade Certi-label shakes and shingles
- Ventilated underlayment so the wood dries from both sides
- Stainless or hot-dipped galvanized ring-shank fasteners only
- Copper or heavy-gauge flashings sized for a lifetime roof
Reference illustration of the material, not a Culmen project.
75–150+ years
Natural Slate
Quarried stone, installed by hand
Slate is the original lifetime roof. A properly installed hard slate roof will outlast the people who put it on, and usually the next two or three owners of the house. It is heavy, it demands skilled hands, and it rewards both with a roof that simply does not wear out.
Best for
- Estate and landmark homes
- Churches, institutional and civic buildings
- Owners restoring or matching an existing slate roof
How we build it
- Vermont, Pennsylvania and Spanish hard slates, S-1 rated
- Structural review to confirm the framing can carry the load
- Copper flashings, snow guards and ridge details built to match the slate
- Slate repair and partial replacement on existing roofs
Product photography courtesy of Brava Roof Tile.
50-year limited warranty
Synthetic Slate
Composite slate with the look of stone at a fraction of the weight
Engineered polymer slate gives you the chiseled edges, varied widths and color blends of quarried stone without the structural load or the cost of hand-laid slate. It will not crack, curl, or absorb water, and it carries the highest fire and impact ratings available on a residential roof.
Best for
- Homes that want the slate look on standard framing
- Hail-prone and high-wind exposures
- Insurance-conscious owners looking for Class 4 impact credit
How we build it
- DaVinci multi-width, single-width and Province profiles, plus Brava Old World Slate
- Straight or staggered coursing to match the character of the home
- Cool-roof color options for reflective performance
- Matching hip, ridge, starter and turret accessories for clean transitions
Product photography courtesy of Brava Roof Tile.
50-year limited warranty
Synthetic Shake
Composite shake with the texture of cedar and none of its maintenance
Composite shake reproduces the deep grain and random widths of hand-split cedar in a material that never rots, splits, or feeds moss. It is the right answer for owners who love the cedar look but do not want to think about their roof again.
Best for
- Replacing a failing cedar roof without losing the look
- HOA and fire-district settings where wood is restricted
- Owners who want a maintenance-free lifetime roof
How we build it
- DaVinci multi-width, single-width and Select shake profiles, plus Brava Cedar Shake
- Hand-split shake siding for gables, dormers and accent walls
- Ten standard colors from Blonde Cedar to Timber Black, plus cool-roof blends
- Ventilated underlayment and ring-shank fasteners on every installation
Reference illustration of the material, not a Culmen project.
Lifetime limited warranty
Designer Asphalt
The heaviest laminated shingles made, cut to read as slate or shake
Composition shingles belong on this page. Not the builder-grade three-tab every subdivision gets, but the luxury laminated grade: two full base shingles bonded together, random tab widths, and shadow lines deep enough to read as hand-cut slate from the street. They carry the same lifetime limited warranty as the composites at a fraction of the cost, and on the right house they look right.
Best for
- Owners who want the slate or shake look on an asphalt budget
- Insurance replacements where the carrier is paying for a shingle roof
- Homes in neighborhoods where the whole street is shingled
How we build it
- CertainTeed Grand Manor, Carriage House and Belmont
- GAF Camelot II, Grand Sequoia and Slateline
- Open copper valleys on the luxury lines, not woven or cut
- Matching hip and ridge, starter, and a ventilated ridge on every roof
Not sure which system fits?
Bring us the house. We will tell you what the framing can carry, what the neighborhood allows, and what will look right on your roofline.