Inspecting Roofs

We Don’t Walk Roofs!

Inspect & Report Roof coverings and type Roof drainage system (gutters) Flashing Skylights, chimneys & roof penetrations

General Roof Reporting Identify:

Type & approximate age (ask homeowner) Number of layers

Condition: Satisfactory = roof covering will last over 5 yrs Marginal = less than 5 yrs life remaining Poor = replace soon (major repairs required)

Roof Structure Terminology

Roof Types: Overview

Roof Types: Gambrel

Roof Types: Gable

Roof Types: Mansard

Roof Types: Hip

Components of asphalt shingle roof

Typical valley and roof detail of underlayment

Open-valley flashing: rolled roofing

Open-valley: Sheet metal flashing

Woven valley

Closed-cut valley

Ridge caps from standard shingle

Step flashing where sloped roof meets vertical wall

Flashing at chimney: step flashing at sidewalls

Flashing at chimney: Apron flashing at low side

Roofing Materials: Natural enemies Sun – expansion contraction breaks down material

Rain – erosion of materials

Wind – lifts shingles

Trees-scrape and deposit sap

Moss – collects water & promotes rotting

Snow/Ice-causes uplift of roofing materials

Time-age and wear & tear

Roofing Materials: Life expectancy

Asphalt Shingles 15-20 yr Roll Roofing 10 yr Wood Shingles 10-40+ yr Clay Tile 20+ yr Slate 30-100+ yr Asbestos Cement Shingles 30-75 yr

Reporting on roof covering

Report: Condition of roofing material Condition of ridges, valleys & interfaces Loose or missing components Signs of water penetration Repaired areas

Eight Warning Signs of Roof Deterioration

Ceiling Spots Algae Growth

Curling Buckling

Missing Shingles Shingles Deteriorating

Damaged Flashing Erosion of Granules

Example of Loss Of Granules(Erosion)

Example: Curling

Buckling and Cracking

Wood shingles & shakes

Typical Problems:

•Rot and deterioration•Loose or missing pieces•Mildew/moss•Water penetration