Tightness Testing from Druk Limited
is air tightness?
tightness, or air permeability, of a building provides an indication of how 'leaky'
the building envelope is. Here, air leakage relates to the uncontrolled flow of
air through the gaps in the building envelope.
is this important?
a building is, the more heat will be lost to the outside. Increased heat loss
leads to higher heating costs, increased energy inputs and therefore increased
carbon dioxide (CO2) emissions.
are the Building Regulation Requirements for Air Tightness?
part of the Government's general commitment to reduce carbon emissions, the Building
Regulations Approved Document L1A (ADL1A) "Conservation of fuel and power
in new buildings", places limits on the air permeability of new dwellings;
the lower the value of air permeability, the less 'leaky' is the building. The
design air permeability for a new dwelling is formulated during the design phase,
however, according to the Building Regulations, the design air permeability must
not exceed 10m3 / (m2.hr)@50Pa.
Quite simply, in order
to demonstrate that the specified air permeability has been complied with, the
Approved Document requires sample testing of each dwelling type on a development.
The dwellings to be tested will be specified by the Building Control Officer,
although the absolute sample size will depend on whether Approved Construction
Details have been employed or not.
choose Druk?We offer a professional, competitive service tailored to meeting
our customers' needs combined with the fact that we have many years experience
in providing technical services to the construction industry. We are approved
by the British Institute of Non-Destructive Testing (BINDT) for the purposes of
air tightness testing in new domestic dwellings. As we are BINDT approved, Building
Control bodies are authorised to accept our test certificates as evidence that
the procedures specified in the Approved Document have been complied with, without
the need for them to be present during the test.
a new company, established in 2007, Druk can draw on many years experience in
acoustics, environmental protection and building services. Director Robert Smith
has over 15 years experience in environmental protection, acoustics and building
and construction services, working within both the public and private sectors.In
addition to being a qualified environmental Health Officer, Robert also holds
additional qualifications in acoustics and environmental protection.