Roof & Shingles - Keep Your Home In Shape

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Building Envelope · Roofing & Weatherproofing

Roof & Shingles

Your roof is the single most expensive system to replace and the hardest to inspect yourself — most leaks start small at a flashing seam years before you ever see a stain on the ceiling. A twice-a-year look from the ground catches problems while they're still cheap.

All 9 zonesLifespan: 15–70+ yrs depending on materialThe most expensive system to replaceBuilding Envelope

Avg replacement cost

$5,900–$46,000+

installed, $4–$11/sq ft, varies hugely by material

Inspection / repair cost

$100–$400

inspection; $150–$1,000 typical minor repair

Most common failure point

Flashing & pipe boots

not the shingles or tiles themselves

DIY-able tasks

~15–20%

fall risk keeps most work pro-only

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ℹ️Asphalt shingle — the most common residential roofing material in the US, in 3-tab or architectural styles. Typical lifespan 15–30 years depending on climate, ventilation, and installation quality. Lowest upfront cost and widest color selection, but the most sensitive to attic ventilation and UV exposure. Installed cost $5,800–$20,000 ($4–$11/sq ft).

Maintenance tasks

Task	Cadence	Skill	Time	Consequence if skipped
Ground-level visual inspection Scan for missing, curling, or discolored shingles from the ground	Twice yearly, spring and fall	1 · Beginner	15 min	Early damage goes undetected until an active leak develops
Clean gutters Remove leaves and debris so water sheds properly off the roof edge	Twice yearly plus after major storms	2 · Confident	1–2 hrs	Water backs up under shingles, feeds ice dams, and rots fascia and soffit
Trim overhanging branches Keep tree limbs from scraping shingles or dropping debris	Annually	2 · Confident	Varies	Abrasion strips granules; falling debris causes impact damage and clogs valleys
Remove moss or algae growth Treat black streaks and moss patches that trap moisture	As needed	2 · Confident	30–45 min	Moss lifts shingle edges and holds moisture; algae accelerates granule loss
Inspect and reseal flashing and pipe boots Check the metal transitions and rubber pipe collars for cracking	Annually	3 · Advanced	30–60 min	Flashing and pipe-boot failure is the #1 cause of shingle-roof leaks
Check attic ventilation and insulation Confirm intake and exhaust venting is clear and insulation is adequate	Annually	2 · Confident	30 min	Poor ventilation causes premature curling, ice damming, and can cut roof life by years

Troubleshooting

Symptom

Likely cause

Action

Who

Curling shingle edges

Aging, poor attic ventilation, or thermal shock

Isolated curling can wait for a repair cycle; widespread curling signals it's time to plan replacement

Call pro

Granule loss — bald spots or granules in gutters

UV wear, uneven application, or poor ventilation causing overheating

Inspect for exposed shiny-black asphalt; if widespread, plan a replacement timeline

Call pro

Black streaks (algae)

Algae in humid climates, typically on shaded north-facing slopes

Clean with a roof-safe low-pressure solution, never a pressure washer

DIY ok

Missing or torn shingles after a storm

Wind uplift, a broken sealant strip, or impact damage

Tarp the area temporarily if actively leaking, replace shingles promptly

Call pro

Ceiling stain or an active drip

Flashing or pipe-boot failure, ice dam backup, or a cracked shingle uphill of the stain

The true entry point is often higher than the stain — get a professional to locate and repair it

Call pro

Recommended tools & materials

Roof Sealant / Flashing Cement

Flashing and pipe boot repair

Task	Cadence	Skill	Time	Consequence if skipped
Bi-annual visual inspection Scan panels for rust spots, scratches, and loose seams	Twice yearly	1 · Beginner	30 min	Small issues escalate into leaks and corrosion before being caught
Clear debris off the roof and gutters Prevent leaves and needles from trapping moisture against panels	Annually plus after storms	2 · Confident	1 hr	Trapped debris holds moisture against the coating, accelerating corrosion
Check and tighten fasteners Exposed-fastener systems back out over time from thermal cycling	Annually	3 · Advanced	30–45 min	Backed-out fasteners create direct leak points and allow panel movement and noise
Inspect and reseal flashing and seams Check butyl tape and sealant at ridges, valleys, and pipe penetrations	Annually	3 · Advanced	30–60 min	Seams and penetrations are the primary leak point on metal roofs, not the panel field
Check for rust or corrosion and touch up coating Address coating breaks before they spread	Annually	3 · Advanced	Varies	Untreated rust perforates the panel, especially at cut edges
Get a professional inspection Catch hidden seam and fastener wear a ground inspection misses	Every 2–3 years	3 · Advanced	Varies (pro)	Hidden fastener and seam degradation goes undetected until active leaking

Task	Cadence	Skill	Time	Consequence if skipped
Ground-level visual inspection Scan for cracked, slipped, or missing tiles	Twice yearly thorough, monthly casual	1 · Beginner	15–20 min	Cracked or displaced tiles expose underlayment and go unnoticed until a leak appears indoors
Clean gutters and valleys Keep water channels clear so runoff doesn't back up under tiles	Twice yearly	2 · Confident	1–2 hrs	Clogged valleys push water backward under the tile courses
Remove storm debris Clear branches and leaves that collect between tile profiles	After storms	2 · Confident	Varies	Trapped debris holds moisture and promotes moss and algae growth
Replace cracked, broken, or slipped tiles Swap damaged tiles before water reaches the underlayment	As needed, promptly	3 · Advanced	Varies (pro strongly recommended)	Even hairline cracks let water reach and degrade the underlayment
Reseal concrete tile coating Concrete tiles are porous and absorb water without a sealed finish	Every 3–7 years	3 · Advanced	Varies	Unsealed concrete tiles absorb water and crack from freeze-thaw cycling
Plan underlayment inspection and replacement The waterproof layer beneath tiles wears out well before the tiles do	Every ~20 years	3 · Advanced	Varies (pro)	Underlayment failure causes leaks even when every visible tile looks intact

Task	Cadence	Skill	Time	Consequence if skipped
Clear drains, scuppers, and gutters Keep water pathways open so the roof drains fully	Quarterly, monthly in fall	2 · Confident	30–45 min	Blocked drainage is the #1 cause of ponding, which accelerates every other failure mode
Check for ponding after rain Confirm water clears within the acceptable window	After each significant rain	1 · Beginner	10 min	Standing water weighs over 5 lbs per sq ft per inch and accelerates membrane breakdown
Visual membrane inspection Check for blisters, punctures, seam separation, and discoloration	Quarterly	2 · Confident	20–30 min	Small membrane damage expands under UV and thermal cycling into active leaks
Inspect and reseal seams and flashing Seams, not the membrane field, are the most common leak point	Annually	3 · Advanced	45–60 min	Seam failure is the single most common flat-roof leak source
Remove debris and clean the surface Prevent leaves, branches, and grit from puncturing or holding moisture	Seasonally	2 · Confident	30–60 min	Debris traps moisture and can puncture membrane under foot traffic or wind
Get a professional inspection Catch hidden membrane and insulation wear a homeowner walk-through misses	Annually	3 · Advanced	Varies (pro)	Saturated insulation and early seam wear go undetected until interior leaks appear