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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

Good Hearing?
A typical person with good hearing can hear from about 20Hz to 20kHz (the audio bandwidth). A person's voice will usually range from 500Hz to 2kHz...more
Part L1B
Conservation of fuel and power in Existing Dwellings

Our other services include:
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Part G Water Calc can also be known as:
Part G Water Calculation, Water Usage Calculation, Part G, Water Calculations,
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Company No. 06728970
In County Q
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