Due to increasing Covid19 infection rates, the Scottish Government has introduced additional local restrictions in Glasgow from 2nd September 2020.
The details of this can be found on the Scottish Government website - Local Measures for Glasgow
This restrictions relates to households meeting within homes. The restrictions do not prevent tradespeople from being allowed in your home to carry out repair or improvement work, as the detail from the guidance advises:-
Tradespeople and mobile services
Workers can continue to go into other households to carry out work such as repairs, installations and deliveries.
Such visits should be subject to a risk assessment as well as ensuring that social distancing and correct wearing of masks is followed where appropriate.