How To Level a Stone Walkway

Lifting a concrete slab (called mudjacking) with Ask This Old House landscaping contractor, Roger Cook. Click here to SUBSCRIBE to the official This Old House YouTube channel: http://www.youtube.com/subscription_center?add_user=thisoldhouse Tools List: Core drill Pneumatic hammer Pneumatic rock drill Air compressor Concrete pump Hydraulic concrete pump with pressure gauge Shopping list: Concrete grout made of sand, silt and Portland cement; used to raise sunken slab Steps: 1. Cut through slab with gas-powered saw fitted with 12-inch diamond blade; that'll allow the sunken slab to lift up. 2. Use diamond-tipped core drill to bore several large-diameter holes through slab. 3. Use a pneumatic rock hammer to drill a 12-inch-deep hole through each core hole. 4. In a mobile mixer, blend a grout mixture of sand, silt and Portland cement; mix the grout with water in auger. 5. Use a hydraulic concrete pump to pump the grout through the core-drill holes. 6. Continue to pump grout into the holes a little at a time until slab starts to rise up. 7. Once the slab is level, cement the concrete-core plugs back into holes. 8. Push the plugs flush with the slab, then use sponge to clean the area around the plugs. Ask This Old House TV Homeowners have a virtual truckload of questions for us on smaller projects, and we're ready to answer. Ask This Old House solves the steady stream of home improvement problems faced by our viewers—and we make house calls! Ask This Old House features some familiar faces from This Old House, including Kevin O'Connor, general contractor Tom Silva, plumbing and heating expert Richard Trethewey, and landscape contractor Roger Cook.   This Old House releases new segments every Sunday, Monday, Wednesday and Friday.   Keywords: This Old House, How-to, home improvement, DIY, ask this old house, roger cook, stone, walkway, repair Follow This Old House and Ask This Old House: Facebook: http://bit.ly/1psm4fC Twitter: https://twitter.com/thisoldhouse https://twitter.com/asktoh Pinterest: http://bit.ly/1psm4fE G+: http://bit.ly/1CtsNjJ Instagram: http://bit.ly/1psm1QZ Tumblr: http://bit.ly/1CtsLbH