Denray Posted February 29, 2012 Report Share Posted February 29, 2012 What causes the white color on the interior of this garage wall? It's redwood. The exterior siding is wood also. Click to Enlarge 69.65 KB Link to comment Share on other sites More sharing options...
Jerry Simon Posted February 29, 2012 Report Share Posted February 29, 2012 Looks like fungus Link to comment Share on other sites More sharing options...
Tom Raymond Posted February 29, 2012 Report Share Posted February 29, 2012 Salts. It's essentially the same as efflorescence, the siding gets wet when it rains, the paint prevents it from drying to the exterior, so it dries in and leaves behind anything dissolved in the water. Link to comment Share on other sites More sharing options...
John Kogel Posted February 29, 2012 Report Share Posted February 29, 2012 What causes it? Moisture. [] Link to comment Share on other sites More sharing options...
Denray Posted February 29, 2012 Author Report Share Posted February 29, 2012 Yep, the outside was painted. Thanks for the info all. Link to comment Share on other sites More sharing options...
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