Customized sheds and garden sheds in montreal. cabanon fortin makes high quality garden sheds, gazebos and garages to answer all your outdoor storage needs. cabanon fortins construction norms exceed the regular standards in effect in the field: we use only quality materials to ensure the sturdiness of our sheds and garden sheds.. Sheds quebec it is with great pride that missisquoi cupola & structures introduces to you, an exciting new line of garden sheds. after years of listening to our canadian customers in search of original, durable and attractive storage options, we have decided to offer them the type they are looking for..