Building Homes or Extensions/wet OSB/fiberboard


I've recently had an insidious leak from bathroom plumbing. Upon removing the affected drywall it was noted that the interior pressure treated bottom plate and the exterior OSB/fiberboard had sustained water damage, the fiberboard stained to appx 20" yet does not feel wet or soggy. Clean up was done and the area is open to dry. Is the structural integrity of the bottom plate and the exterior OSB/fiberboard compromised?? Is it prudent to close up the walls without removing or performing extensive remodeling??Help!

Hi Stacey, if the wood in question is dried out and when poked with a knife or a sharp,screwdriver it doesn't appear to be rotten, you are only looking at water stains.  If the leak is fixed and no more water intrusion is taking place you can cover it back up.  Home Depot has a good product called Moldarmor that you can spray on the stained parts to kill any molds that may still be present and help keep any mold from returning.

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Bruce E. Johnson


I can answer any construction related question in regards to carpentry, concrete, drywall, masonry, structural elements of any type of building, residential or commercial. Interior or exterior.


Custom Commercial and residential buildings. Churches, theaters, schools and auditoriums. Most recently I am working with the Catholic Church on several design build committees. I have a website related to scheduling and project supervision. Although my expertise is more related to multimillion dollar commercial, educational and theatrical projects my generous credentials in residential and remodelling construction make me a viable source of information regarding all forms of building questions.

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