Downspouts

Across Canada, many municipalities have mandatory, volunteer or rebate programs to encourage homeowners to disconnect their downspouts from the sewer system. Directing rainwater away from sewers has economic and environmental benefits. Here’s how to disconnect your downspouts.

What Are Downspouts?

Downspouts are the vertical pipes that drain water from the roof down to the ground. They clear the rainwater that collects along the edge of the roof in the eavestroughs and direct it away from the building’s foundation. The water is then typically piped to the storm sewer system, piped to a combined storm and sanitary sewer system, or diverted into the ground through natural seepage.

Benefits of Disconnecting Downspouts

Sudden, heavy rainstorms can cause combined sewer systems to overflow. When sewers overflow, basements and waterways can be flooded with untreated storm water and wastewater.

According to the Canada Mortgage and Housing Corporation, homeowners and municipalities can derive economic and environmental benefits by disconnecting downspouts. These benefits include:

  • Reduced likelihood of basements flooding due to unsanitary sewer backups and leaking downspout connections
  • Less storm water in the sewer system, decreasing the chance that untreated water will overflow into local streams and lakes
  • Cleaner watercourses and a replenished groundwater table
  • A reduced chance of flash flooding in rivers
  • Lower energy requirements to run the sewer system and wastewater treatment facilities, resulting in fewer greenhouse gas emissions
  • Increased availability of water for lawns and gardens if it’s collected in rain barrels.

5 Tips for Disconnecting Downspouts

Many municipal websites offer advice on disconnecting downspouts. Consider the following:

  1. Ensure that the rainwater will flow onto your grass or into your garden.
  2. Direct the downspout so the rainwater will flow away from your foundation walls, not cross a driveway or walkway, and not negatively affect a neighbour’s property.
  3. Make sure your eavestroughs and nearby municipal catch basins are free of debris, such as leaves.
  4. Position the downspout so there is a minimum slope of 1 metre (3 feet, 4 inches) away from your house.
  5. Consult a knowledgeable and licensed roofer, eavestrough contractor or civil engineer for expert guidance.3

How to Get Disconnected – A Step-by-Step Guide

Source: Insurance Bureau of Canada

Blenheim Office

24 Marlborough St. N., Box 479
Blenheim, ON N0P1A0

Phone: 519-676-8159
Fax: 519-676-0020

Chatham Office

250 St. Clair St.
Chatham, ON N7L 3J9

Phone: 519-352-4343
Toll Free: 1-800-561-4949
Fax: 519-352-6484

Essex Office

29 Talbot St. N, Box 69
Essex, ON N8M 2Y1

Phone: 519-776-6457
Fax: 519-776-7400

Harrow Office

65 King St. W., Box 790
Harrow, ON N0R 1G0

Phone: 519-738-2277
Fax: 519-738-2279

Tilbury Office

59 Mill St. E, Box 1239
Tilbury, ON N0P 2L0

Phone: 519-682-0202
Fax: 519-682-2391

Wallaceburg Office

403 Wellington St.
Wallaceburg, ON N8A 2Y2

Phone: 519-627-1777