Attic Mold Problem / Add More Insulation

In Uncategorized on January 7, 2014 at 10:23 am


I read your article about roof vents. I was planning on buying a house and the inspection showed Cladosporium Mold in the attic area from mold samples taken.  The relocation people are planning to clean up the mold using a remediation company and they advised ventilating the attic. Should I buy this house or not? What is the chance of reoccurrence? Does it come back after cleaning? Please advise me on this.


If the mold is properly removed, cleaned, and/or sealed you should be all right. The key word is “properly”. Properly means “following protocols and thoroughly”. I’ve inspected houses where the workman took short cuts and didn’t remove or seal all the areas and of course the mold started to manifest itself all over the attic.

One of the most common molds is Cladosporium. One place in which this mold can be found is in a place that sustained water damage.  This type of mold can cause allergic and asthmatic symptoms and also some skin and nail infections.

One concern of mine is: has the mold spread down the walls behind the drywall? Was testing done at the completion of the job to verify if the mold was entirely removed? Who did the testing? Was it the same company that did the remediation? If so, that certainly could raise some doubts.

If any insulation was exposed to the mold, was it removed and replaced? If not, the spores could be throughout the insulation and when it gets humid or wet, you’ll experience a déjà vu.

Finally, kitchen or bathroom exhaust fans venting into the attic should be directed to the exterior and make sure you have sufficient ventilation in the attic. It’s a fact that people feel better just venting.


I live in a 20-year-old Pulte house, and in the attic there is insulation “stuff” that came from a machine. I’m writing in hope of a response, as I’ve found that during the summer and winter, the first floor is always cooler/warmer than the upstairs floor and feel it is due to not enough insulation in the attic. Granted since the heater and AC are in the basement, it is natural for the first floor to be cooler or warmer. I have even closed off and opened vents when needed to accommodate the changes.

With the talk of cost increase with natural gas, I would like to know if putting more insulation in the attic would solve my problem. If you agree, then I would do it myself using the pink bat type insulation. What rating should I use is another question I would like to know, and should I put the paper side on top of the present insulation or have it facing upward toward the roof?


If you’ve never added any insulation, you probably have about R-19. That’s the minimum and generally what builders put in around the time your house was built. The minimum for builders is now R-30. The “R” refers to the insulation’s Resistance to heat and/or cold. The higher the R-value, the more comfortable you will be and the more money you will save.

I’m one of those people who feel the minimum amount should be R-48. I prefer R-60 since utility costs will continue to rise.

Each different type of insulation has its own R-value. For example, it takes only 8-inches of cellulose insulation to give you an additional R-30. Rolls or batts of fiberglass have to be 9-10 inches to equal R-30, but using loose fill fiberglass you’ll need 13 to 14 inches.

If I were you and wanted to do it myself, I’d use 9-inch batts or rolls of un-faced fiberglass. You can easily work with it and don’t need any special equipment. I’d wear a quality respirator, protective goggles, gloves, and a hard hat so you don’t injure yourself with a protruding roofing nail. I would also lay the insulation perpendicular to the joists and butt each section tightly to the adjoining piece of insulation.

Make sure the soffit vents are adequate and not obstructed. You should see light around the edges where the roof boards come down and meet the ceiling. If not, the vents may be inadequate or obstructed.

Check out my website at www.technihouse.com and click on “Insulation – Packing It In” to take you through the process.

Invite your friends and family to join my blog too!



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