Window leak - how long to dry out?
A short while ago, we discovered a minor leak at a window that gets the brunt of heavy wind-driven rain. After several weeks of dry, sunny weather, the exterior of the window was recaulked and repainted (the house is brick.) I could detect a musty odor in that room, but dh could not smell it. A dehumidifier was run and the avg. RH stayed about 42% - 45%. Finally, dh agreed that we should cut into the drywall and investigate. We'd only had a couple of light sprinkles since the work was done, so it really hasn't been tested. When we cut out a section of drywall, we found damp insulation. Moisture meter readings of the wood studs ranged from 18% to 25% and there are signs of mildew/mold on the back of a portion of the sheetrock.
Tonight, we plan to remove the sheetrock from the lower 4' of the entire wall (windows cover about 3/4 of the wall), dispose of the insulation, and clean the area with a Borax solution. Afterwards, the plan is to run a larger dehumidifer plus a heater in the closed off room. Our hope is that by Sunday afternoon, we can install new insulation and sheetrock.
Is it reasonable to assume that the current dampness is due to water intrusion before the recaulking? Is it also reasonable to assume that the wall will dry out enough with the help of the heater & dehumidifier to replace the insulation and sheetrock within 36 - 48 hrs. of removing the old damp material? I've gotten conflicting advice about what moisture reading to look for on the wood. Some say 16% max while others say Thanks for any help.