![]() And equally important, it keeps unwanted heat out. Insulation keeps the heat inside the building. The less surface area relative to the floor area, the less thick the insulation can be. ![]() The greater the amount of external surface area a building has (essentially the ground floor, external walls and the roof) relative to the floor area of the building, the greater the thickness of insulation that will be required. ‘Super-insulation’ is a relative term and does not always mean extremely thick insulation though. High-performance windows and doors are also needed. In basic terms, this means super-insulation, an airtight barrier on the inside of the insulation and a windtight barrier on the outside of the insulation. To do this, a high-performance thermal envelope is required. The Passivhaus Standard delivers exceptional indoor comfort and building energy efficiency. The Passivhaus Building Envelope: A High-Performance Thermal Envelope The passivhaus building envelope requires a high-performance thermal envelope, it must be continuous and it is key to the fabric first approach. ![]() The passivhaus building envelope is also made up of these elements, but there are some key aspects that make the passivhaus building envelope distinct. In simple terms, this means that the building envelope is made up of the walls, floors, roofs (or ceilings), windows and doors that separate the inside from the outside. The three basic elements of a building envelope area weather barrier, air barrier, and thermal barrier. When fully deployed in all the cavities of a typical building, Pinhole Insulation® will double or triple the energy savings compared to traditional weatherization technologies…at a cost that is an order of magnitude less than traditional “deep energy retrofit” technologies.In passivhaus design and construction, there are frequent references to the “building envelope” and the “thermal envelope.” Neither are exclusive to the Passivhaus Standard, but both are important aspects of the standard.Ī building envelope is the physical separators between the conditioned and unconditioned environment of a building including the resistance to air, water, heat, light, and noise transfer. We're currently expanding Pinhole Insulation® technology to cathedral ceilings, dormer roofs and flat roofs. In large multifamily buildings we have reduced thermal energy use, and associated carbon emissions, by 20 to 25%. In a typical 1950's era fiberglass insulated wall, our technology increases insulation values from R10 to R23. ![]() We can fill an entire wall cavity through easily patched 1/4” holes and can insulate an entire house in just one day. Since then, we have further developed and refined our Pinhole Insulation® technology through additional grants from the MassCEC, the US Department of Energy, MassRobotics and CertainTeed/Saint Gobain. Our mission began in 2014 when we were awarded a grant by the Massachusetts Clean Energy Center (MassCEC) to develop a way to inject highly insulating closed cell polyurethane foam into under-insulated fiberglass filled wall cavities. Building Envelope Materials is on a mission to develop quick inexpensive minimally disruptive methods for reducing thermal energy use and carbon emissions of occupied buildings to zero. ![]()
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