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WattCostLab Visual Library

Home Improvement Visual Guides

See what can change project scope before you compare contractor quotes. These visuals highlight observable red flags and better-practice cues without pretending to replace a qualified inspection or local code review.

Use with the calculators: a visual cue may explain why one quote includes more removal, repair, access, electrical or preparation work than another.

Roof replacement visual guide comparing damaged shingles and flashing with a clean, professionally finished asphalt shingle roof.

Roof Replacement

See the visual red flags, better-practice cues and the cost guide or calculator.

Open roof replacement guide →

HVAC replacement visual guide comparing blocked airflow, corrosion and poor clearance with a clean condenser on a level pad and tidy service routing.

HVAC Replacement

See the visual red flags, better-practice cues and the cost guide or calculator.

Open hvac replacement guide →

Heat pump installation visual guide comparing blocked airflow, poor mounting and messy line routing with adequate clearance and a level professional installation.

Heat Pump Installation

See the visual red flags, better-practice cues and the cost guide or calculator.

Open heat pump installation guide →

Window replacement visual guide comparing deteriorated caulk, moisture staining, damaged trim and gaps with a clean sealed and professionally finished window.

Window Replacement

See the visual red flags, better-practice cues and the cost guide or calculator.

Open window replacement guide →

Attic insulation visual guide comparing patchy compressed insulation and exposed gaps with even coverage, consistent depth and properly sealed penetrations.

Attic Insulation

See the visual red flags, better-practice cues and the cost guide or calculator.

Open attic insulation guide →

Electrical panel upgrade visual guide comparing overcrowded, poorly labeled and worn wiring with a clean, organized and clearly labeled professional panel.

Electrical Panel Upgrade

See the visual red flags, better-practice cues and the cost guide or calculator.

Open electrical panel upgrade guide →

EV charger installation visual guide comparing a messy exposed charging setup with tidy cable management, secure mounting and protected electrical routing.

EV Charger Installation

See the visual red flags, better-practice cues and the cost guide or calculator.

Open ev charger installation guide →

Water heater installation visual guide comparing visible corrosion, staining and disorganized piping with a clean, accessible and professionally organized installation.

Water Heater Installation

See the visual red flags, better-practice cues and the cost guide or calculator.

Open water heater installation guide →

Solar installation visual guide comparing shading, debris and inefficient panel placement with an unobstructed, organized and professionally installed rooftop solar array.

Solar Installation

See the visual red flags, better-practice cues and the cost guide or calculator.

Open solar installation guide →

Siding replacement visual guide comparing warped, stained and misaligned siding with uniform alignment, clean joints and a professional weather-resistant finish.

Siding Replacement

See the visual red flags, better-practice cues and the cost guide or calculator.

Open siding replacement guide →

Renovation video library

Curated external videos for understanding real installation scope before comparing renovation quotes.

Heat pump installationThis Old House · YouTube ↗Attic insulationThis Old House · YouTube ↗Foam insulationThis Old House · YouTube ↗Electrical service upgradeThis Old House · YouTube ↗Window replacementThis Old House · YouTube ↗EV charger renovation installThis Old House · YouTube ↗Home solar installationEnergySage · YouTube ↗