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

Adam wrote:
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?

It depends which way the rain is driving, the other day it could have been
blowing against this wall, today it may be blowing in the opposite direction
leaving this wall relatively dry...cement still sets in the rain, but
running water will cause it to wash out, if it does this, you will be left
with a cementy mess on your roof!

"Phil L" wrote in message
.uk...
Adam wrote:
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?

It depends which way the rain is driving, the other day it could have been
blowing against this wall, today it may be blowing in the opposite
direction leaving this wall relatively dry...cement still sets in the
rain, but running water will cause it to wash out, if it does this, you
will be left with a cementy mess on your roof!


Thanks for that. So does that mean that if it looks OK in a couple of days'
time and isn't a cementy mess all over the roof then it probably is OK?

Adam

Adam wrote:
"Phil L" wrote in message
.uk...
Adam wrote:
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?

It depends which way the rain is driving, the other day it could
have been blowing against this wall, today it may be blowing in the
opposite direction leaving this wall relatively dry...cement still
sets in the rain, but running water will cause it to wash out, if it
does this, you will be left with a cementy mess on your roof!


Thanks for that. So does that mean that if it looks OK in a couple of
days' time and isn't a cementy mess all over the roof then it
probably is OK?
Adam

Basiclly, yes, and it doesn't need a few days, if it's alright after 12
hours it's not going to wash out, no matter how much it gets wet.

"Adam" wrote in message
...

Thanks for that. So does that mean that if it looks OK in a couple of
days' time and isn't a cementy mess all over the roof then it probably is
OK?

Assuming the 'cementy mess' hasn't washed off the roof, into the gutter and
down the drain!

Julian.

"Phil L" wrote in message
.uk...
Adam wrote:
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?

Cement sets by chemical reaction, so it will go off under water. Some large
yachts even carry a sand and cement mix for running repairs if they get
holed. The only problem is if it washes out of position before it goes off.

Colin Bignell