How to Build a Pondless Waterfall | Ask This Old House

Jenn Nawada, landscape designer for Ask This Old House, helps install a pondless waterfall in a backyard. (See below for a shopping list, tools, and steps.)
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Shopping List for How to Build a Pondless Waterfall:
– Pondless waterfall kit that includes pump, liner, and pipe-
– Closed-cell black spray foam
– Boulders
– River rocks
– Mulch

Tools for How to Build a Pondless Waterfall:
– Shovels
– Utility knife

Steps for How to Build a Pondless Waterfall:
1. Dig a large area for the plastic blocks, and include a deeper area for the pump vault.
2. Square up the sides of the basin and level off the bottom.
3. Lay down landscape fabric as a first layer.
4. Lay down waterproof rubber membrane.
5. Place plastic boxes and pump vault in basin and reservoir to serve as a base.
6. Fill in the remaining spaces with some river rocks.
7. Place pump in basin and connect pipe to spillway.
8. Place boulders in area to form the waterfall.
9. Fill voids between boulders with black expanding foam that will direct water so that it’s visible over the stone.
10. Fill the rest of the bed with river rocks.
11. Trim off excess liner around the edges with a utility knife and fold the liner onto itself to create a slight dam.
12. Plant in landscaping and cover area with mulch.

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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 Build a Pondless Waterfall | Ask This Old House
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