09:16AM | 02/03/04
Member Since: 02/02/04
3 lifetime posts
Here's my problem, I have a cement porch/balcony which is covered with European Mosaic. There is a room below the porch and the ceiling of that room is accumulating mold.

Any suggestions to get rid of the mould.

Thank you in advance.

plumber Tom

03:05PM | 02/03/04
Member Since: 05/10/03
801 lifetime posts
I'm not an expert on mold, but moisture may be seeping in somewhere. Check all mortar and masonry joints. Is there caulking where the cement porch meets the house? It seems like the mold is growing because it has the right environment and conditions. Post back with some more details (brick, block walls?,etc.) and we can try to figure it out.


07:10AM | 02/11/04
Member Since: 02/02/04
3 lifetime posts
Thank you for the feedback Plumber Tom.

Here are a few more details;

For one thing this property is located in the Mediterranean, where construction is slightly different.

There is about 4 inches of cement, on top of this cement they have dropped another mixture of cement and gravel to give it a shiny glossy look (this being the mosaic). Hope this helps.

No brick, no caulking, the whole structure is cement.

Thank you


01:32PM | 03/10/04
Member Since: 02/02/04
3 lifetime posts



05:23PM | 03/11/04
Member Since: 01/28/03
693 lifetime posts
Mold results where water is present and all concrete, cement, grout, mortar and most stones are permeable to water.

This means, as Tom said, there is either some joint or crack where liquid water is allowed to pass or that water is simply passing directly thru the masonry.

Otherwise, you could simply have a condensation problem brought about by highly humid Mediterranean air condensing on colder masonry surfaces.

The first order of treatment is to seal the masonry from the outside elements and then perhaps to condsider dehumidification or heating the room(s) where the mold is occuring.

Likewise you could treat the surfaces with paints or coatings with mildewcide additives.


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