We had some roofing contractors replacing the flashing on our flat roof
earlier this week. They left the job unfinished, as it was raining at the
time, and said that they couldn't cement the flashing in place while it was
raining. This sounded reasonable, and I believed them.

They came back today to finish the job. It was raining again this morning,
but they went ahead and did it anyway.

So, were they just looking for an excuse to skive off early when they were
with us earlier in the week, or is the cement they put in place today not
going to set properly?

Many thanks
Adam