Join Date: Nov 2014
Location: Eugene, Oregon, USA
Mentioned: 24 Post(s)
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There are many things to consider. For a business, presentation is everything. So, you'll need a store front that is inviting to your customers. In some cases it might mean a rugged appearance. In other cases a homey appearance. It should also be important how you blend with neighbors.
Display windows are nice, but not all shops invite window shopping.
Inevitably barn roofs leak, but the hidden fastener roofs are extremely good and leakproof, especially with insulation to prevent condensation.
You list Canada, so I would think very good insulation would be important for working 12 months a year. Your questions about insulation and interior finishing are probably best for your vendor. Perhaps also hire an architect. Are you constructing a multi-story building? You probably don't need 30 foot high ceilings..
You likely will also need building permits, so your city/county building inspectors would also be good resources.