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ROOFING INSPECTION & REPAIR
AMERICAN CEMWOOD ROOFING
BEST ROOFING PRACTICES
BUILT UP ROOFS
CATHEDRAL CEILING VENTILATION
CERTIFICATIONS for ROOFING CONTRACTORS
CHIMNEY FLASHING Mistakes & Leaks
COLD WEATHER ROOF TROUBLE
DECKS, ROOFTOP CONSTRUCTION
EPDM, RUBBER, PVC ROOFING
EXTRACTIVE BLEEDING on SHINGLES
FIRE RETARDANT PLYWOOD
FLASHING on BUILDINGS
FLAT ROOF MOISTURE & CONDENSATION
GREEENHOUSE / SOLARIUM ROOF LEAKS
HEAT TAPES & CABLES for ROOF ICE DAMS
ROOF ICE DAM LEAKS
MASONITE WOODRUF FIBERBOARD ROOFING
NOISE CONTROL for ROOFS
PLASTIC ROOFING TYPES
PVC, EPDM, RUBBER ROOFING
ROOF ARCHITECTURAL STYLES - PHOTO GUIDE
ROOF CLEANING RECOMMENDATIONS
ROOF COLOR RECOMMENDATIONS
ROOF INSPECTION SAFETY & LIMITS
ROOF LEAK DIAGNOSIS & REPAIR
ROOF NOISE TRANSMISSION
ROOF REPLACEMENT SNAFUs
ROOFING FELT UNDERLAYMENT REQUIREMENTS
ROOFING MATERIALS, Age, Types
SADDLE CONSTRUCTION at CHIMNEYS
SNOW GUARDS & SNOW BRAKES
STANDARDS for ROOFING
STRESS SKIN INSULATED PANELS
TEST LABS - ROOF SHINGLE
TREES & SHRUBS, TRIM OFF BUILDING
TRUSSES, FLOOR & ROOF
UNDERLAYMENT REQUIREMENTS on ROOFS
VENTILATION in BUILDINGS
WALK-ON ROOF SURFACES
WARRANTIES for ROOF SHINGLES
WORKMANSHIP & ROOF DAMAGE
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.
Green links show where you are. © Copyright 2015 InspectApedia.com, All Rights Reserved.
An earlier version of this article appeared in the winter 1991 issue of the ASHI Technical Journal - the content has been substantially edited and updated and many © photographs have been added for this online version - April 2006-January 2007- July 2012.
Slate roofing is considered a high-quality, durable, and aesthetically pleasing material which receives considerable focus in both the sale of properties and in the evaluation of building condition.
Also see SLATE ROOF COLORS.
As we emphasized at SLATE ROOF INSPECTION & REPAIR our main article on slate repairs, opinions run heavier than actual data.
The abandonment of good slate roofs which should have been repaired is a financial shame and the destruction of a valued asset.
[Click to enlarge any image]
At the same time, careless optimism about a bad slate roof which is at the end of its life risks an angry inspection client.
SLATE ROOF INSPECTION & REPAIR reviews types of slate, common defects, inspection topics, and some repair tips.
Closed lap staggered slate pattern, shown just above, don't mistake this for the leak-prone "Dutch lap" late roof pattern [illustrated later on this page] that too often was installed with minimal side lap between slates
Conventional staggered horizontal slate pattern, good condition on a steep mansard roof - good nails must have been used
Curved ridge slate roof, this unusual design risks wind-blown rain leaks
Curved ridge slate roof, close-up view of gaps - slates don't bend along a curve
Diamond pattern slate roofs, tar patched, a few missing slates, this roof may seem OK, but what about all of that tar/mastic patching?
Diagonal pattern roof slate, red and green, good condition, shown here on a building on the Vassar College Campus, Poughkeepsie, NY
Dutch lap pattern with good side lap, adequate side lap makes leaks less likely but quite often shingles were installed in this pattern with just an inch of side lap and very little head lap, making for a leaky roof. Our Dutch lap slate roof at above left is on the Vassar College Campus, Poughkeepsie, NY, and at above right is a Dutch-lap pattern slate roof on a home in Putney Vermont.
French Pattern Slates, generous side lap visible where slate is missing, tarred valley, thin, delaminating slates
Graduated Slate Roof, generally good, some roof mastic patching at a missing slate; note the mastic at sidewall step flashing?
Graduated Slates, green slates, generally good condition, note less algae below copper salts washing down from skylight
This article series 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, and conditions.
Continue reading at SLATE ROOF COLORS or select a topic from the More Reading links shown below.
Suggested citation for this web page
Green link shows where you are in this article series.
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