Homeowners battle asbestos while installing a French drain and bathtub in the basement.

John DeSilvia identifies the marks of an unqualified home contractor while touring a couple's home.

Repairs to an improperly constructed kitchen and roof are made.

John and the team install a waterproof roof and renovate flooded rooms for a couple whose previous contractor did a shoddy job.

A bathroom is renovated to accommodate a homeowner who uses a wheelchair as a result of a heart condition.

John remodels a kitchen that flooded due to an unscrupulous contractor who abandoned the job before completing the necessary plumbing work.

A house gets new exterior siding and insulation.

John and the team repair plumbing, water damage, loose tiles and the door of a bathroom job gone awry.

A balcony is redone after a disastrous contracting job.

John renovates a home devastated by flood damage from Hurricane Irene.

John helps an expectant couple renovate their moldy basement.

John and the team install a new heating-and-cooling system in a three-story brownstone.

The crew finish a couple's master bath and bedroom after a contractor used their payment for other jobs.

A basement is renovated to accomodate a large family.

John fixes a major plumbing problem caused by a botched washer and dryer installation.

John DeSilvia fixes a shoddy roofing job for homeowners Bob and Marie.

John repairs a pool that has left homeowners drowning in debt.

John helps repair an improperly constructed attic roof job.

John helps a couple renovate a two-story addition that was installed improperly and illegally.

John renovates a sunroom that was botched by the previous contractor.

John helps a mother of three fix extensive water damage that occurred due to shoddy installations.

John helps a couple whose contractor abandoned their project to convert their master bathroom into a peaceful retreat.

Fixing the damage caused by a faulty HVAC installation.

Renovating a deck on the brink of collapse due to a shoddy contracting job.

A water damage repair mission becomes more difficult after serious safety hazards are discovered.