Maple Grove MN and Plymouth MN are MN Cities in which the ground is 90% clay. Every year Maple Grove and Plymouth lead the state in deck footing complaints.
If you have a level and you live in Maple Grove or Plymouth MN, dig it out of your garage and place it on your deck to see if your deck has heaved. When a deck moves even a 1/2 an inch, this will loosen the nails that support your deck and it can lead to many problems.
Maple Grove MN and Plymouth MN, along with a few other cities in Minnesota, are very concerned because deck collapses across the country are at an all time high!!
Please look at your deck with a critical eye during the springtime; we can help!