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    New Smoke Alarm Circuit

    I am installing 3 connected smoke alarms and want to chase walls etc... in preparation for electrical work. So (1) Can the three smoke alarms be put onto a simple new radial circuit? (2) What cable/fuse should be used?
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    Leaking Concrete Roof

    Hi Our local sports pavillion has 2 leaking flat cocnrete roofs about 20 sq metres in size each. What is the best and most economical method of repair (cost is important as it is an amateur sports club and 200 quid is a lot of money to these guys).. Duration of repair only needs to be 2-3...
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