Pic - damp patches showing at joints

[Rachelle]

HI,

I'm wondering if anyone can give me a suggestion as to why there seems to be damp areas showing at the point of the joints of my patio. We had this work done in August and the patio was sealed in September. Since then there are patches of white which i beleive will dissapear in time and after rainfall, what i think are damp patches have shown up. I've gone back to the firm who carried out the work but can't get any explanation.

Can anyone help ?

Thanks

[James.Q]

get back in touch with the contractor ask them about blooming all to common a problem with concrete imprint

[Rachelle]

Can you give me some idea on what i should expect
the contractor to tell me ? What would cause this ?

Thanks

[matt h]

excess moisture in the mix,prewetting before imprinting the weather at the time..ie damp conditions, etc etc see main site ref pic

[Tony McC]

It's almost impossible for us to comment on projects we can't see. If you have damp aggregating around the expansion joints, then the first question I'd ask is whether these joints were ever sealed with mastic or similar?

[James.Q]

never known a imprint job to be sealed with a mastic joint .but would like to see one

[Tony McC]

I've seen one or two, but I mean "one or two". They are all supposed to be mastic sealed, but very few PIC installers ever bother.

[Rachelle]

Hi,

I'd like to attach a picture but dont' know how to !!!

Can you let me know how and i'll send one of the patches and the sealed joints

Thanks

[IanMelb]

Hi,

I'd like to attach a picture but dont' know how to !!!

Can you let me know how and i'll send one of the patches and the sealed joints

Thanks

Have a look at this link

http://ext.pavingexpert.com/cgi-bin....;t=4485

Ian