Talking about cowboy/Calais builders, you wonât believe this. I called round to a neighbourâs house to chat to the âbuilderâ who was renovating an outhouse into a billiard room. He was playing round with some wiring, and said that when he flicked the two way switch, the lights dimmed. I immediately knew what heâd done: crossed a neutral. He and his mate were using a DIY french book, and he showed me the page for two-ways. There was a blue line going to the second switch: I had to look twice. I couldnât believe it: the book had an error. I explained that on no account did neutral wires go near a light switch, and I rectified the problem. The two boyos were, a brickie and a former advertizing executive.
Three years ago, in response to my radio programme, I was asked to look at some supposed subsidence. When I arrived, there was a rep from Saint-Astier, the owner and the builder. I looked at the supposed problem, and told the owner that is was nothing to do with subsidence. He said it was the builder who told him.
What happened was tragic! The builder turned out to be a tiller, who had worked on the first phase of project, which had been another disaster. A Brit outfit had been contracted, but was âlet goâ!
The tiller, who lived in the area, got pally with the owner and gave a price for the external rendering. The building was a huge agri hangar, and one half of the interior had a complete house built inside it. The partition wall was of concrete blocks: 11 meters long, and almost 9 high, with no expansion joints. A second house was to be built for the in-laws, who changed their minds.
The top coat of the render was the Saint-Astier ready mixed NHL mortar, which was covered in fine spider cracks: it had dried too quickly. On one corner of the hangar, there were stress cracks in the render, but not in the clay/rubble stone wall. I asked what had been used for the bottom coats, and was told by the builder that he had used a cement mortar with added lime. I asked what lime? The stuff off the shelf at the merchants, was the reply, which I had expected. He thought heâd bought plain hydrated, but had got hydraulic.
Besides the fact that no cement should have been used, he had done the opposite to what he thought he was doing, i.e, making the mortar weaker. The stress between the cement render and the older wall had caused the render to crack, hence the subsidence malarkey. (I visited the property on several occasions and using levels, monitored the subsidence, which, of course didnât exist.)
The builder did a bunk back to Blighty, the following week, still claiming it was subsidence. (He had just sold his house)