Please pray

I am just off to the builders merchant to buy materials for todays work, I will be doing something I have never done before, I will be putting a new roof on and extension, it is a flat roof and is just like a shed roof, in that it is timber covered with felt, but still it is a bit different to what I have done before.

My customer is a lady of mature years who is a bit nervous of tradesmen so wanted someone she knows to do the job, so that's me.   Apart from actually doing the job, I am a little worried about the weather, please, please don't rain!