- Visually inspect all portions (slopes) of the roof.
- Note any sagging, uneven, damaged, or patched sections.
- Look for overhanging tree limbs or branches that can cause damage.
- Is the area directly below the roof deck ventilated?
- Is the roof in need of a cleaning?
- Look for curling, cracked, torn, or missing shingles.
- Are shingles losing their stone granules?
- Look for eroded sections in the slot between the shingle tabs.
- Pay particular attention to slopes with a southerly or southwesterly exposure.
- How old are the roof shingles?
- How many layers of shingles?
- If roof has been recently reshingled, is a guarantee/warranty available?
Wood shingles, shakes
- Look for rotting, loose, cracked, chipped, or missing sections.
- Pay particular attention to the slopes with heavy shade.
- Any signs of moss?
Slate, asbestos-cement, clay tiles
- Look for missing, cracked, chipped, flaking, or loose sections.
- Sections patched with asphalt cement?
- Are the valley joints filled with asphalt cement?
- Safe access available?
- Cracked, blistered, eroded, split, punctured, or torn sections?
- Look for open joints and seams.
- Areas of ponding water or low points where water will accumulate?
- Drainage system functional?
- Area below the roof deck adequately ventilated?
Built-up roofs (BURs)
- Are there areas with missing aggregate?
- Look for blisters in the membrane.
Roll roofing (tar paper)
- Sections drying, eroding, or blistered?
- Look for open seams.