asphalt path/driveway slumping

Cause

Soft ground/uneven settlement 

Repair

  • if deterioration is minor, sawcut around the damaged area to 50 mm depth; remove defective asphalt; have a contractor place new asphalt
  • if deterioration is extensive, remove all existing asphalt; place compacted metal (gravel) base course; have a contractor lay new asphalt or concrete that is a minimum 100 mm thick and reinforced for vehicles; 75 mm thick for pedestrian-only paths (reinforcing not required) 

Cause

Inadequate base preparation/depth

Repair

  • if deterioration is minor, sawcut around the damaged area to 50 mm depth; remove defective asphalt; have a contractor place new asphalt
  • if deterioration is extensive, remove all existing asphalt; place compacted metal (gravel) base course; have a contractor lay new asphalt or concrete that is a minimum 100 mm thick and reinforced for vehicles; 75 mm thick for pedestrian-only paths (reinforcing not required) 

Cause

Overloading

Repair

  • if deterioration is minor, sawcut around the damaged area to 50 mm depth; remove defective asphalt; have a contractor place new asphalt
  • if deterioration is extensive, remove all existing asphalt; place compacted metal (gravel) base course; have a contractor lay new asphalt or concrete that is a minimum 100 mm thick and reinforced for vehicles; 75 mm thick for pedestrian-only paths (reinforcing not required) 

Cause

Leaking pipe or drain

Repair

  • if deterioration is minor, sawcut around the damaged area to 50 mm depth; remove defective asphalt; have a contractor place new asphalt
  • if deterioration is extensive, remove all existing asphalt; place compacted metal (gravel) base course; have a contractor lay new asphalt or concrete that is a minimum 100 mm thick and reinforced for vehicles; 75 mm thick for pedestrian-only paths (reinforcing not required)