"Dear Team Members, My wife and my self would like to thank you for the super service that we have gotten from you on a couple of occasions. The siding and windows were done just the way we wanted and... » more
- Jim and Mary Jones Davenport, Iowa


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Moisture Vapor Transmission Rate

The rate at which moisture diffuses through a substance. Generally given in the following units: grams/meters2 x 24 hours. The lower the MVT rate, the greater the resistance of the sealant to moisture penetration.

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