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Sound Insulation
Two parameters describe sound insulation; Dw and Rw. Dw is the insulation between rooms. Rw is the lab-tested insulation of a wall/floor...more

Point of Reference
10 dBA is the sound level of normal human breathing. To put it into perspective, thunder is a whopping 120 dBA...more
Part L1A
Conservation of fuel and power IN NEW DWELLINGS

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Code for Sustainable Homes Daylight Calculations can also be known as:
C4SH, Code for Sustainable Homes Daylight Calculation, Sustainable Homes, Code Assessment, CSH, Code for Sustainable Homes,
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