ROOF

     A - Hip

    B - Ridge

    C - Field
    D - Gutter
    E - Downspout

    F - Roof Deck

    G - Rafter

    H - Underlayment
 

19a - Asphalt Shingles
Commonly called composition shingles, this material has a typical life expectancy of 12 to 25 years depending on many factors.  The number of roofs installed over existing shingles is limited to three and in some jurisdictions only two is allowed.

19b - Wood Shake & Shingles
Wood roofs will typically last 20 to 35 years depending upon the thickness and quality.  Annual maintenance is required on wood roofs which consists of replacing the weather damaged shakes.  In some areas the constant moisture can cause the wood to deteriorate.  Care against fire is advised.

20a - Clay & Concrete Tile
These materials are very durable and have anticipated life of 30 to 50 years.  The tiles however are brittle and can be damaged, so the roof cannot be walked on.  The inspection is very limited.

20b - Slate
Considered one of the longest lasting roofing materials, slate can endure 50 to more than 100 years.  A very brittle and expensive roof, inspections are limited.

20c - Metal & Fibrous
Metal roofing comes in many forms from shingles to panels.  Fibrous roofing is a mixture of various materials including cement and perlite.

21a - Built-Up Roofing
The surface covering is the distinguished feature of this roof cover.  Maintenance consisting of repairing any worn areas is required.  Installed on low slopes, these roofs should be inspected annually due to the potential for poor drainage.

21b - Single Ply
A relatively new roofing system, single ply membranes are gaining popularity.  The roof covering consists of large sheets of a rubber or PVC based compound.

21c - Foam
Polyurethane foam with elastomeric coating.  This roof requires periodic re-coating to extend it's service life.

22 - Exposed Flashings

    A - Wall Flashing

    B - Drip Edge

    C - Sewer Vent
    D - Gas Vent
    E - Chimney Flashing

    F - Rain / Spark Cap

    G - Cement Cap

    H - Roof Valley

    I - Exhaust Vent

    J - Skylight

    K - Gable Vent

                                                                                   L - Ridge Vent

                                                                                   M - Soffit

                                                                                   N - Eaves

                                                                                   O - Facia

                                                                                   P - Guttering

                                                                                   Q - Downspout

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