Cash-strapped Brits trying to save money on renovation projects are being warned that the average DIY disaster will cost £2,000 to repair.
Plumbing is the area that homeowners struggle with the most and failed attempts at faucet installation are the most common overall.
Craftsmen described the worst breakdowns they had to repair in recent years, including fires caused by unclean socket installations.
Others said they saw plumbing work, sealing joints with tape and erecting brick walls using pure cement as a mortar.
In fact, more than half (50.4 percent) of handymen said they often spend a third of their day sorting through botched home improvements.
Some Brits have bills as high as £75,000 to fix these faults, although the average repair bill is £2,000.
Selco Builders Warehouse says a dodgy kitchen installation can cost between £580 and £760 to repair – and that excludes the cost of replacement furniture, worktops or appliances.
Hanging a rickety door could cost Brits £500.
The final repair bill for a DIY disaster always depends on the scope of the project.
But Selco, owned by the Grafton Group, said DIY jobs can also be expensive and dangerous.
Carine Jessamine, the company’s director of marketing, said, “DIY is common, but it’s not easy. There seems to be a growing interest in home renovation projects on social media right now, with many across the country trying their hand at various projects in their homes.
“Electrical work can be particularly dangerous and it’s probably best to leave it to a professional as even small mistakes can have serious consequences such as electrocution and house fires.”
More than 5,600 people required hospital treatment after coming into contact with a power hand tool last year and another 2,700 people had an accident with a non-power hand tool such as a saw or hammer, new NHS data shows.
Ms Jessamine added: “While smaller and less complicated projects can be fairly easy and even satisfactory to complete, our study showed that Brits often need to call in the professionals to fix home renovations or repairs they have tried but not been successful with . Not only can this prove expensive, but sorting can also take a while.
“Anything to do with gas boilers or systems you should always consult a Gas Safe engineer (and make sure he is registered) as this work involves the risk of gas leaks which certainly should not be underestimated .
“Not only that, but trying to attempt complicated projects like knocking down walls can create additional problems related to the structure of your home.
“For major bathroom plumbing projects, the incorrect installation of a bathtub or shower can result in leaks or flooding, drainage issues, corrosion and water damage.
“All in all, it’s often best to just leave it to the professionals.”