in an external wall assembly are the biggest wasters of energy. They waste heat by conduction, radiation and infiltration. This can be controlled to an extent by using multiple layered glazing systems and using low-e coatings on the glass. Additionally, it is important to seal the window and door systems to avoid infiltration. Similarly, in hot and sunny climates, it is important to shade windows to avoid heat gain due to solar radiation. Roof An exposed roof is the greatest source of heat loss during cold months and heat gains during hot months. Therefore, roof insulation becomes very crucial in extreme climate conditions. Another passive technique is to separate living spaces from roof by adding dead buffer spaces such as attics under the roof. Floor The only floor that need be considered is the bottom floor. It may be a slab on grade or built over a crawl space. In these cases, insulation should be considered. If the perimeter of a slab on grade is insulated from the weather, this is all that can be hoped for. Over a cold crawl space, a two-in blanket under the floor will cut the heat loss by at least 50%. A concrete floor slab can be insulated by sprayed-on insulating material. Disassembly sequence planning Building owners and developers can take the potential advantage of adaptive reuse by taking away components from unused buildings and then repair, reuse or recycle its constituent parts. Disassembly is a form of recovering target products and plays a key role to maximize the efficiency of an adaptive reuse project. This disassembly planning sequence aims to reduce the environmental impacts caused due to demolition using a "rule-base recursive analysis system" with practical and viable solutions. By location Americas Canada As a comparatively young country, adaptive reuse is not the norm in Canada, where redevelopment has typically meant demolition and building anew. Calgary and Edmonton are particularly known for their pro-demolition culture, but they are not unique in this regard. However, since the 1990s, adaptive use has gained traction. The conversion of former railway-centred warehouse districts to residential and commercial uses has occurred in Edmonton, Calgary, Saskatoon, Regina, and Winnipeg. In Toronto, the Distillery District, a neighbourhood in the city's southeast side, was entirely adapted from the old Gooderham & Worts distillery. Other prominent re-uses include the Candy Factory on Queen Street West and the Toy Factory, in the city's