VD-04Check for cables and pipes before you drillSweep the exact spot with a cable and pipe detector, even on an outside wall — alarm cables, satellite leads and electric meter tails often run through brick in odd places. A detector can still miss deep or shielded cables, so treat the wall as if something is there until you've drilled a shallow test hole and checked what comes out. Find your stopcock (usually under the kitchen sink) and check it turns freely, so you can shut off water fast if you ever hit a pipe; if there's any real doubt, isolate the relevant circuit at the consumer unit before drilling.