airtightness, airtight test, L2 building regulations, structural envelope, airsealing, insulation, firas, ukas

We have over 10 years building airtightness specialist experience and wish to advertise this to potential customers.

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We have vast experience conducting building airtightness tests and work alongside the nominated testing bodies to complete the airtest. We offer a full package of arranging the airtest, providing all necessary preparations to the building, airtight test fitting temporary sealing to plant, doors etc.. Q - Provisions against solar overheating - Item 4 in the Summary Guide, Paragraph 1.20 et seq and Appendix H: If a discrete zone in a building fails the overheating criteria, does the whole building fail? A - It should be the designers' aim to avoid such airtight test situations in their pursuit of satisfying clients' comfort expectations. However there may be difficult situations where it is impractical to attempt reducing gains to the "norm". In these special circumstances, common sense must prevail. Some suggestions are: i) If the building is an air conditioned office, compliance would be achieved if the CPR is no greater than the value in Table 11: this is implied by Paragraph 1.20b and would allow higher solar loads in a "difficult" space, e.g. a SW corner office to be compensated by lower loads elsewhere. ii) If the building is not mechanically cooled, then there id no simple way of providing such offsetting. The "difficult" space - the SW corner zone for instance - could be treated as part of a main façade, but this would only be justified if the zone was part of an open plan area or was otherwise effectively thermally L2 building regulations coupled with the façade in which it was being averaged. Q - Provisions against solar overheating - Item 4 in the Summary Guide, Paragraph 1.20 et seq and Appendix H: What area should be taken into account when calculating solar overheating potential? A - As stated in Paragraph 1.22, the area in question is the internal area as seen from the treated space. This excludes the floor and ceiling voids. Q - Following the amendment to the Building Regulations, what kinds of work on controlled services and fittings (e.g. new installations, extensions or modifications of existing installations) would be considered to be "building work" under Regulation 3 and would therefore need to comply with Requirement L2? A - As a result of the amendment to Regulation 2 of the Building Regulations, the definition of controlled service or fitting has been extended to include services or fittings in relation to which Part L imposes a requirement. Part L deals with various services but we can illustrate the effect of the changes by considering as examples the following works involving air conditioning systems: