Help! The Floor Board Under Carpet Stinks - Flooring - DIY Chatroom Home Improvement Forum

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Old 05-04-2013, 10:27 PM   #1
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Help! the floor board under carpet stinks

I want to replace the carpet as I am renovating. However, I have a smelly issue with the floorboards under the (now) removed carpet. I believe the board is masonite or MDF, and I removed the carpet and underlay as it smelled of mildew. The smell is still within the boards, and I have left the room to 'breathe' for 4 weeks but the boards still smell. Does anyone know what can be done, as the room is unlivable with such an odour?


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Old 05-05-2013, 04:40 PM   #2
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If they are dry, you might try a primer like BIN. It is an alcohol based product (so use plenty of ventilation) and commonly used for sealing in odors such as in homes where heavy smokers have tainted walls and ceilings.

Some have used Zinsser Cover Stain. It is oil-based primer.

Note that primers are not really meant for floors but in this instance, if padding and new carpet is going over them it might work out. You may have to put a moisture barrier down but then you reduce the ability of the floor to breathe and you may cause a worse situation long term.

Obviously you should source the source of the moisture that is causing this or anything you do is likely to be temporary.

You might ask your real flooring company or real paint store for recommendations. You will just get a "deer caught in the headlights" look at a box store.


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Old 05-05-2013, 04:56 PM   #3
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Kilz or plain shellac will kill the odors but won't help with moisture.
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Old 05-05-2013, 06:10 PM   #4
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If it's masonite or mdf pull it up and replace it,you'll never get rid of the smell.
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Old 05-10-2013, 10:58 PM   #5
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Thanks for everyone giving me ideas! I am in Australia, so I don't think we have the same name brand stores/ and or products....but all ideas are helpful! Thanks to you all :-)
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carpentry , damp , floor , floorboards , mildew

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