we recently tiled our screened-in back porch. it has been several days since it was layed beause the holiday and such. since then I have noticed that every morning I go out to the back porch there is dew that has formed on top of our ungrouted tile. is there a problem and why is this happening? our tile is rated for cold and warm weather. any comments would be greatly apreciated.
I'm not a tiler, you may want to try the tiling section here at BV too.
My guess would be it's acting like a vapour barrier.
Any place where you have cold meeting warm air you'll get condensate, that is when airs water as a gas state (vapor) meets a cold front will turn to a liquid state you know like morning dew.
You've probably heard of vapor barriers which is a sheet plastic between the warm & cold in a wall system.
Your tile being on the arm side is meeting the cool air and creating a dew type effect. Insulating the floor, and placing a vapor barrier on the proper side south & north are different you may be able to stop the reaction?
BUT, that is just an educated guess, have a local insulation conmtractor check it out and like I said try the tiling section too. ;)
Alter Eagle Construction & Design
http://www.altereagle.com/ | Construction & Design | http://decks-ca.com/ | Decks, California outdoor living | http://kingofcrown.com/ | Molding and finishing | http://installcrown.com/ | Crown tutorial