This Old House general contractor Tom Silva shows how to warm up a chilly concrete wall. (See below for a shopping list and tools.)

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Tom helped a homeowner prepare the bare concrete walls in his basement for wallboard. The homeowner wanted to convert his unfinished basement into living space. The first step was to plug the holes in the concrete walls that might let water seep in from outside. To do this, Tom mixed up some hydraulic cement and forced it into the holes. Hydraulic cement expands as it cures, forming a watertight seal. Next, Tom used 2-inch thick foam insulating board to insulate the basement. He applied it to the concrete walls using a special foamboard adhesive. With the foam insulation installed, Tom fastened a wooden "grid" of 1x3 spruce boards over the insulation using masonry "spring spikes." This grid allows wallboard to be fastened with regular drywall screws, and gives an electrician a place to snake wires and install electric boxes for outlets and light switches.

Shopping List for How to Insulate a Basement:
- plant mister [[ Ссылка ]], used to spray water onto the tie-rod [[ Ссылка ]] holes
- hydraulic cement [[ Ссылка ]], for plugging tie-rod holes in concrete wall
- 2-inch-thick rigid polystyrene [[ Ссылка ]], used to insulate wall
- foam board adhesive [[ Ссылка ]], for adhering foam board to concrete wall
- 1x3 spruce [[ Ссылка ]], used to secure foam board and create nailing surfaces for drywall
- 4-inch-long spring spike [[ Ссылка ]], secures wood boards to insulated wall
- 1 5/8-inch drywall screws [[ Ссылка ]], used to fasten vertical 1x3s

Tools for How to Insulate a Basement:
- masonry hammer [[ Ссылка ]] and center punch [[ Ссылка ]], used to drive tie rods [[ Ссылка ]] into concrete wall
- margin trowel [[ Ссылка ]], for applying hydraulic cement [[ Ссылка ]]
- caulking gun [[ Ссылка ]], used to apply foam board adhesive [[ Ссылка ]]
- chalk reel [[ Ссылка ]], used to snap horizontal lines
- hammer drill [[ Ссылка ]] and 3/16-inch masonry bit [[ Ссылка ]], used to drill holes in concrete walls
- drill/driver [[ Ссылка ]], for fastening vertical 1x3s to horizontal 1x3s [[ Ссылка ]]

Tom used Quikrete [[ Ссылка ]] hydraulic cement to plug the holes in the concrete foundation
Tom used two-inch thick rigid foam insulation on the walls manufactured by Owens Corning Insulation [[ Ссылка ]]
Tom used masonry "spring spikes" to attach the 1x3 lumber to the concrete wall manufactured by DeWalt [[ Ссылка ]].


About 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.
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How to Insulate a Basement | This Old House
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