A lot of people ask me if a small house is easier to pass than a big one ... I typically find that a bigger house has a lot more room for forgiveness, but a well built small house can be really tight.
Let me give you an example ... I did a test today for a 7 bedroom house in Leeds that got a 6. Now, that's a good score typically. But you have to take into consideration that this house was designed very well, and had a lot of things going for it as far as becoming air tight. He had polystyrene inner walls that were overfilled with concrete and underfloor heating on both the ground floor and the first floor. The interior walls were all filled concrete. This house was completely formed of the stuff. But, he had a few disadvantages, he had spotlights throughout the house that he hadn't bothered to account for in his build process and had allowed the electrician to drill holes everywhere which led to air pathways that could only escape through them. I've never seen anything like it in a house. In the kitchen, standing under one of these lights with the fan on, it was like a window was open above you. As well, the plumber let him down on the site as the only other areas that leaked were the closets where the cylinder was and the boiler with its connections to the underfloor heating.
I did a test on a large apartment complex where they were small one and two bedroom units and they each got 2's and 3's. This was because the contractor had had a test before and been a borderline pass, learned from that build with our team and came out the other side very well.
What am I trying to say? Just don't worry. Think about what you're doing, and get some advice if you're unsure.
For more information or to book a test, call me on 01484 686649 or visit my website on http://www.hometestingyorkshire.co.uk/
I hope this helps
Matt
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