Which decking should you use? 

There are several possible decking materials that work and are easily available in the Ottawa area. Maybe more than several. Pressure treated and cedar wood. Ipe and other tropical woods. Some industrially processed woods such as "Thermory". PVC and vinyl. There are many types of composite decking materials . Here are a few pros and cons; 

Pressure treated woods; This is the least expensive and least attractive choice. This wood will last outdoors for about 20 years so long as it is installed properly. All cuts must be treated with a preservative. Almost all deck framing is pressure treated wood, but the material sold as decking is generally rougher than other available choices. You must wait a year before staining this material. 

Cedar, either Western Red or Eastern White;  This is the most commonly used decking material in the Ottawa area, They are similar woods , with approximately the same durability, and virtually identical pricing.  Western Red Cedar generally comes in longer lengths and is more readily available. It can be more reddish in appearance, The Eastern White is usually more like a neutral brown. Both fade quickly to silver grey if they are not stained. They make good decking, and will last about 20 years, more or less. . Most clients love the appearance when the work is completed, and hope that it will continue to look that way. It won't. To maintain appearance, most people stain the wood.You must wait 60 days before staining.  Usually, the stain needs to be redone every 2 or 3 years, especially in the areas where  people walk regularly. Cedar costs more than pressure treated, but generally not so much more that it makes a great difference in the average deck, probably a few hundred dollars more for the average $10,000 deck. 

Ipe or other tropical woods; These have been available for about 10 years. Ipe is a dark , heavy tropical hardwood which is described by the dealers as a 50 year wood.  It costs about 5 times what cedar does. It will last well outdoors in our climate, but does fade over time, so many people end up treating it with oils that help maintain the colour. It makes a dramatic looking and hard wearing deck. These decks are still framed with pressure treated wood normally. So, the decking may be good for 50 years , but the frame will go about 20-25. 

PVC , Vinyl; --Such as Azek or Zuri brand decking. These can be quite good looking and durable materials. They appear to be trouble free so far. They don't require repeated staining or  maintenance other than cleaning. Usually installed with hidden fasteners. Railings are also available made with the same materials. The cost is usually around 5 times that of cedar when all the details are included. The deck framing must be more closely spaced than with cedar since the material hasn't much structural strength. The framing for almost all decks is pressure treated so,  as with Ipe, the decking may outlive the frame. 

Composite decking;  There are many brands of composite materials around. Trex and Timbertech are 2 common brands. The details of the manufacture count. Most are installed with hidden fasteners. Early versions of this type of material  had quite a few problems with the most frequently mentioned being fading and staining. There have been a couple of very large class action suits settled by the  manufacturers. Current versions are quite improved, both in durability and appearance. The cost is usually around 3-4 times the cost  of cedar, with the better ones costing more. Railings made from these materials can be as much as 10 times the cost of cedar railings. They are essentially maintenance free, but as with other options, the frame is good for the usual 20-25 years. 

Note about frame durability; Porches with roofs last about 100 years, including the floor framing, as long as the roof doesn't leak. Usually, the stairs, not under the roof, last about 25 years, like a deck frame. So a deck  with a full, permanent canopy should have a long life. It is a situation where the more expensive decking materials are easier to  jusify.