Slate Roof Colors - A Photo Library of Slate Roofs
SLATE ROOF COLORS - CONTENTS: Photo catalog of roofing slate colors & slate types - pictures of roof slate color choices: varied, green, red, ribbons, gray, black roofing slate. Photos of rust-stained roofing slates. Photos of green algae-stained roof slates. Photo Guide to Slate Roof Inspection. How does roof slate color or pattern affect anticipated roofing slate life? Roof slate colors and patterns can often identify the source or even source quarry of roofing slates
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Photo guide to roofing slate colors and slate types.
This slate roofing photo library shows various kinds of roofing slate, slate roof colors, slate
roof patterns, and roofing slate defects. This photographic dictionary of roofing slates is a supplement
to our detailed article (links at the "More Reading" links at the bottom of this article ) describing procedures for evaluating the condition of slate roofing.
How to inspect, identify defects, and estimate remaining life of slate roofs are addressed.
An online photo dictionary of roofing slate colors, types, and conditions
This article assists home inspectors, building buyers or building owners, and roofing contractors in
evaluating the condition of slate roofs by providing photos of various slate materials, patterns, defects,
Colors: Varied slate colors, in good condition but with a suspect valley - note the roof mastic in the valley and the missing slate.
Green Roofing Slate Photos
Green Slate roof that is probably ok but, in our photo at left, but look for failing fasteners - note the slates slipping down?
Our second "green slate roof" photo (below right) demonstrates that algae growth on roofing slates can leave a green coating.
This home was observed on Brookside in Mt. Kisco, NY.
Red Roofing Slates in Good Condition, Photographs
Red slate roof, perhaps from the Granville NY quarry are shown at below-left.
We don't know how long this superb material will last as we've never found one that was worn out on a roof in the U.S. but a rated life may be 300 years.
Our second red roof slate photo (below right) illustrates a mix of red slates from the Granville NY quarry and ribbon slates on a home on Clinton St. in Poughkeepsie, NY.
Rusty Red Roof Slates
Below we show red-looking slates on a home in Poughkeepsie, NY. Rust-stains on roof slates may turn some slates red below rusting steel flashings.
Our second rust-stained roof slate photo (below-right,Putney VT) is quite clearly showing rust staining on roof slates from a rusting ridge cap. But other roofing slates are naturally rust colored as we show below at Rust-colored Slates from China
Ribbon Slates, Photos, Patterns, & What is the Life Expectancy of Ribbon Slate on Roofs?
Ribbon Slate is roofing slate with linear colors running in stripes through the slate material. Often the "ribbons" are diagonal depending on how the slate was quarried.
References about slate roof durability, at least among home inspectors and some slate books, claim that ribbon slates were inferior and likely to have a shorter
life due to their mineral inclusions. However in New York one of the authors (DF) has
observed ribbon slate roofs which appeared to be in good condition after 80-90 years.
The inspector needs to examine the specific roof to determine if the ribbon slates involved
are deteriorating from mineral wash-out or alternatively if they are in good condition.
We were taught that "ribbon slate" was a cheaper product with shorter expected life than better quality solid colored slates from Vermont or Virginia.
But ribbon slates were sometimes chosen deliberately for decorative purposes, and not all of the ribbon slate roofs we've seen suffered from such a short life.
This ribbon-slate roof in Poughkeepsie, New York was about eighty years old when we took the photos above and at left, and it remains in good condition.
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