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Question
Bruce, I had an addition on the back of my house. It was built on a crawlspace where there was 6" gravel then plastic before 4" concrete floor. This year it rained almost every day in June. My humidity in my basement & the new crawlspace is about 75. I run a dehumidifer and it brings it down to 45 to 50 percent. My wife thinks that is still to high. Is it? Also shut the vents on the crawlspace walls be opened or closed in the summer ?
Thanks,
Sal
Hi Sal, 45-50% is perfect in my book. If it has been at 70 or higher for a length of time it might take a while to get the damp or musty smell out of the air. I hope this information helps feel free to write again regarding this or other matters, sincerely bruce e johnson..bejohnsonconsulting.com
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Answers by Expert:
Bruce E. Johnson
Expertise
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.
Experience
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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