JosTec are a lovely, very, very helpful company to deal with. Their engineers are very patient in explaining what they do & the results of the test’s to a novice like me! I have a rental flat in North Watford, Hertfordshire that required a airborne noise test. The flat failed it’s test, but Robert and Carlos were so very helpful in looking at the problem & coming up with a solution, especially as the top floor flat is occupied & so I could not take the easy route & have work done there. Robert came up with the materials/insulation required that we could do to the ground floor flat’s ceiling & yesterday the flat passed it’s retest with flying colours! I can hearty recommend JosTec, they give a five star service!