In this video, the freeze-thaw cycle is wreaking havoc on a homeowner’s walkway, but This Old House mason Mark McCullough answers the call.

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In the Northeast, the freeze-thaw cycle can be tough on hardscaping. As the ground freezes each winter, it pushes rocks and other obstructions upward, causing cracks and heaving in patios, walkways, and other masonry surfaces. When a homeowner experienced some walkway damage, she called the Ask This Old House team, and mason Mark McCullough knows the perfect solution.

Where to find it?
To demo the damaged walkway section, begin with making cuts on either side of the crack using a circular saw [homedepot.sjv.io/4P73E1] with a masonry grade blade [homedepot.sjv.io/xkKB5k]. Use a HEPA vac [homedepot.sjv.io/PyQoVq] to cut down on dust. Once the straight breaks are established use sledgehammers [homedepot.sjv.io/ZQG2KW] to break up loose pieces. Use shovels [homedepot.sjv.io/Jz0kDr] and a pickaxe [homedepot.sjv.io/xk3JYd] to remove rocks.

To reestablish the base add a layer of gravel [homedepot.sjv.io/NkxgzV] and hand tamp [homedepot.sjv.io/R5YjLy] firmly into the ground until level. This will help with drainage and will absorb the pressure of a rock being pushed to the surface by frost.

To create the forms, use precut 2x4s [homedepot.sjv.io/ZQG2BW]. Jam one end of the 2x4 into the edge of the existing concrete using a hammer [homedepot.sjv.io/ZQmzbR]. By aligning the 2x4s with the existing concrete it creates a leveled pitch for the form.

Drive in a stake [[ Ссылка ]] on the outer side of each 2x4 for extra support. Lay down wire mesh [homedepot.sjv.io/eK0DeZ] on top of the gravel to help resist cracking.

Use a concrete premix [homedepot.sjv.io/g1n9qv] and add water. Mix in a wheelbarrow [homedepot.sjv.io/OrDXyK] with shovels until desired consistency is achieved. Once the concrete mix is poured use a 2x4 to screed the concrete to a smooth and level finish.

To remove air bubbles, use a magnesium float [homedepot.sjv.io/Nkxg2P]. Sponge off excess moisture using a masonry sponge [homedepot.sjv.io/9gQ655].

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Materials:
Crushed stone [homedepot.sjv.io/NkxgzV]
2x4 for forms and screeding [homedepot.sjv.io/ZQG2BW]
Rebar [[ Ссылка ]]
Number 9 masonry wire mesh [homedepot.sjv.io/eK0DeZ]
Concrete mix [homedepot.sjv.io/g1n9qv]

Tools:
Chalk line [[ Ссылка ]]
Heavy-duty circular saw [homedepot.sjv.io/4P73E1]
Masonry blade [homedepot.sjv.io/xkKB5k]
Wet/dry vacuum [homedepot.sjv.io/PyQoVq]
Sledgehammer [homedepot.sjv.io/ZQG2KW]
Shovel [homedepot.sjv.io/Jz0kDr]
Pickaxe [homedepot.sjv.io/xk3JYd]
Hand tamp [homedepot.sjv.io/R5YjLy]
Hammer [homedepot.sjv.io/ZQmzbR]
Wheelbarrow [homedepot.sjv.io/OrDXyK]
Bucket [[ Ссылка ]]
Dust mask [[ Ссылка ]]
Eye protection [[ Ссылка ]]
Ear protection [[ Ссылка ]]
Masonry float [homedepot.sjv.io/Nkxg2P]
Edging tool [[ Ссылка ]]
Joint tool [[ Ссылка ]]
Masonry sponge [homedepot.sjv.io/9gQ655]

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About Ask This Old House TV:
From the makers of This Old House, America’s first and most trusted home improvement show, Ask This Old House answers the steady stream of home improvement questions asked by viewers across the United States. Covering topics from landscaping to electrical to HVAC and plumbing to painting and more. Ask This Old House features the experts from This Old House, including general contractor Tom Silva, plumbing and heating expert Richard Trethewey, landscape contractor Jenn Nawada, master carpenter Norm Abram, and host Kevin O’Connor. ASK This Old House helps you protect and preserve your greatest investment—your home.

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How to Repair a Concrete Sidewalk | Ask This Old House
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