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September 14, 2009

End Mold and Mildew Forever

Glove_and_concrobium2_5x7_100_dpi Hi Mag , i have a question for you - i have two washrooms and both of them are full of mold.  every month i clean the walls and ceiling with bleach.   mold comes back again.  what should i do to get rid of it.  my house is about 18 years old. please advise.  thanks.


Hi there,

The product you need is available at the Home Depot in Canada. It’s called Concrobium. It stops mold and mildew and it doesn’t come back.  Ever.  (here's one example from my own home)  Concrobium is formulated from food-grade chemicals so it’s non-toxic. It’s a brand new product and I've used it to kill both the smell and reappearance of mildew in our basement and porch. It rocks.  www.concrobium.com

Here are the instructions for use:

1. Remove heavy soil from the surface to be treated.

2. Thoroughly spray the entire area with Concrobium (or apply with a Concrobium-soaked cloth or roller). . If surface has visible fungal growth or staining, additional scrubbing may be required. Note: Concrobium is safe for us on almost all surfaces, including wallboard, plaster, ceiling tiles, wood, metal, plastic, stone, concrete, tile, fabrics, upholstery. If in doubt, perform a test on a small, inconspicuous section.

3. Wipe off excess wetness.

4. Allow to dry overnight (16-18 hours). Do not rinse. Note: in the event of accidental over-application, a harmless white residue may form on the surface. This can be easily wiped away with a Concrobium-dampened cloth.

Concrobium is available in most hardware stores in the US and Canada.



Hi ther Toolgirl, have you thought why ba might be getting black mould in the first place, the humidity is too high in the house, you need a change of air, you could do with a Heat Exchange Fan, this draws in fress air & it is then heated by the warm stail air, the 2 air channels do not meet!
A great prouduct

Bye from the Dampman


We just recently discovered a leak in the roof which has our attic wet and now I see we have mold on the beams, I haven't touched the insolation but the hallway celling paint has started to peel, what can I do


Hi Olga,
I'm Mag's husband and thought I'd give you a quick answer as Mag may not be able to for a day or two.

The first thing is to find out if your insurance covers roof leaks and then get them to take care of it.

Ultimately, the roof will have to be patched, the insulation replaced and the mold sprayed while the insulation is out. So the quicker you get the roof fixed the better.

Hope that helps.


Oh, and Dampman, thanks for the air exchanger idea. We'll look into it.



thanks I'll get to my insurance company tomorrrow and see if it is covered.
I appreciate your help.


I was just wondering if it is possible to get faint grey marks in new lumber or is that a sign of mold growing. Our house is two years old and saw it where the floor joists meet the board above the foundation. I had to remove the insulation to see it and the house is kept at 30-40% humidity. I hope it's not a leak there. No sign of mold on the insulation.


It is possible and even common to have water marks and even mold marks on lumber in new homes. The marks often happen during shipping or construction and don't necessarily mean you have a leak or active mold.

You're humidity level wouldn't support mold growth but if you're concerned about active mold anyway, then I would suggest spraying with Concrobium Mold Control to lock in any spores and to prevent new growth. It's cheap and easy insurance.

Todd Schafer

If only that spray worked on fungal nails!


stupid question, but what are fungal nails?


I just wanted to thank you because I found one of your videos titled replace tail light. I was replacing a tail light on my wife's 2001 Nissan Pathfinder. I unscrewed the two screws from the rear light housing & it would not fully come off. Something was holding it to the body on the left side & I didn't want to force it & possibly break it. So I went to WONDERHOW & found your video. I noticed you located & unsrewed a screw on the outter housing before you unscrewed the two screws I saw at first glance. After viewing your video I returned to the rear of the Pathfinder & searched for the outside screw & didn't find one. I took a gamble & twisted & pulled the light housing a little & it came off. It was being held by two plastic prongs that were inserted into two plastic holes on the body. I replaced the burnt tail light & housing. Everything worked!

Thanks again


DIY Mold Testing

This is a really informative posting I must say. I think I would like to try this product if it is really that much effective on molds and mildews.

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