What is a DPM sandwich?

bread and jamThe term ‘DPM sandwich’ is used within the flooring industry to denote a sub-floor preparation system or process. The term is a rather pleasant euphemism used to describe a lower layer of smoothing compound followed by a middle layer of a liquid DPM (Damp proof membrane), finally covered with a top layer of smoothing compound. One could analogize this by thinking of a Jam sandwich. The bottom layer of bread being the bottom layer of smoothing compound, the jam being the DPM, and the top layer of bread being the top layer of smoothing compound.

Why or what is the purpose of a DPM sandwich? Please click here to find the answer to this question.

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I am a Pergo trained professional installer of 20 years. I've been up close and personal with lots of floors and have the knobbly knees to show for it...Should you have any questions or comments please feel free to add them below. Thanks for taking the time to call by and I hope the information you've found has given you some insight!........................................................................................................................................................................“When you click on links to various merchants on this site and make a purchase, this can result in the site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network, amazon.com, amazon.co.uk, amazon.fr, amazon.de, amazon.it, amazon.ca, affiliate window network.” This statement is to comply with current internet regulations regarding transparency to consumers.

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