You can buy a replacement spring from here: http://www.garagedoorpartsllc.com/ . You should get a professional to install it, though.
There are a number of places in Ottawa, Ontario, Canada where one might be able to buy a garage door spring. It is important to know the brand name of the garage door. With this information, one could shop for this product at Home Depot, Ottawa Garage Door, or Ottawa Overhead Door.
Likely a broken spring
Someone can buy torsion springs for a garage door from DDM Garage Doors, Century Spring, and Garside Garage Doors. There are different types of torsion springs for a garage door and they all come with different dimensions as well.
You can find competitive garage door prices for your garage online from websites such as Competition Doors. Alternatively, you can also get garage door installation service from popular stores such as The Home Depot.
You can go to Jones Garage Service, or United Garage Door Service.
To replace a broken garage door spring, you first need to determine the type of spring used; either torsion or side-mounted. To determine the type of spring, and then to replace the spring, there is a very good website that has all of the information available to replace and adjust the door springs. The website is at http://www.naturalhandyman.com/iip/infgar/infgar1b.html.
Best to call a professional (no joke)
Theoretically, yes.However, depending on why the spring's status is in question, it may be that replacing or repairing the spring is the responsibility of an individual owner.During regular preventative maintenance tasks for the garage door, the spring, which is integral to the operation of the automated garage door, is maintained as a commonly owned asset.
Garage door springs are commonly found cheapest in big box home renovation stores like Home Depot or Lowe's. However, garage door specialty stores, which may be slightly more costly, are also more likely to have the specific spring one might be looking for.
You can find instructions for garage door installation right on the instruction sheet that your garage door came with. You can also check websites such as ehow which will show you the step by step procedure.
You can find a complete buyer guide for garage door openers by visiting www.aaaremotes.com. You can also find more information at www.consumersearch.com.
Here's a place that will sell you a toroision spring: http://www.garagedoorpartsllc.com/ . Replacing it yourself is dangerous, though. Best to leave it to a professional.