Ratio Seven are fully accredited SAP assessors and authorised airtightness testers with over 20 years of house building experience. Offering residential & commercial air testing and SAP calculations, energy consultancy services for housing developers, associations and architects. Keywords: air testing, airtightness testing, sap calculations, air permeability testing, commercial air testing, residential air testing Business Hours: Monday – Friday: 09:00 – 17:00 Business Since: 2008

Ecobuild is a dedicated sound testing and air leakage testing service provider for London and the surrounding areas. Accredited by leading accreditations bodies, SITMA for sound testing, IATS for air testing and Elmhurst Energy for Ventilation testing, you can be rest assured that the certificates we provide will be accepted as evidence to your building control. In addition to your air test and sound test we can also arrange for your SAP and SBEM calculations, as well as Building regulations part Part G – water calculations and Part F for domestic extractor flow rate.