Super Insulated Roof Design

Built up roofs consist of a base sheet fabric reinforcement layers and usually a dark protective.

Super insulated roof design.

Similar to the roof every piece of syseal fabric is custom made for each order and spans the bay s width. Double walls have been built since the early days of super insulated houses. To be considered superinsulated a house must have wall and window r values roughly twice as high as those dictated by area building codes. In 1979 steve kropper and the rowell energy group undertook the retrofit of a 1911 triple decker a three family home design nearly identical to the estimated 18 000 triple deckers in the city of boston.

Polyisocyanurate insulation above the sheathing and approximately 91 4 in. In general this level will also be the most. However there is one tight spot that needs special attention. The vapor and dew point profiles for our climate showed the potential for condensation on the inside face of the exterior sheathing.

Deck for a thick roof rigid foam insulation installed above the roof assembly can create an energy smart roof. Reformulate or coat black membranes to make them reflective. Ample vertical space about 22 inches is ideal exists under most roof slopes to achieve r 60 insulation. With three layers of 11 2 in.

Control of ice dams moisture accumulation and heat gain can also be facilitated by unvented roof design. Interior wall and roof condensation was also a concern during design of the monument house because of the very thick walls 12 and roof 18. There are three methods for insulating the top side of the building envelope box. They typically consist of a conventionally framed 2 4 exterior wall sheathed with 1 2 in.

How they can be made cool. The amount of roof cavity ventilation is specified by numerous ratios of free vent area to insulated ceiling area ranging from 1 150 to 1 600 depending on which building code is consulted the 1 300 ratio being the most common. A second non load bearing 2 4 stud wall is built on the interior. The walls of this house are 2 8 construction with dense pack cellulose insulation r 27 zip sheathing for the air barrier and 6 roxul insulation r 24 for a total insulation value of r 43.

The simple saver wall insulation system is installed completely from the inside out of the wind and weather. To maintain a continuous air barrier the stego wrap is connected to the zip sheathing on the walls which doubles as the air barrier. Of cellulose insulation in the rafter cavities the roof shown here has an r value of approximately 63. Blow insulation onto a flat ceiling.

The kropper house was the first super insulated retrofit in the us.