We have a split king with adjustable base. We also have dogs and a 9yo son, which means our twin xl mattresses get split apart constantly. Every day I have to rescue blankets from “the crack” and push the mattresses together. Does anyone have any good methods to keep the mattresses together? Has anyone tried attach some kind of a bracket to the sides of the base to prevent the mattresses from sliding off, kind of like the wire bracket at the foot of the base?
Edit: I bought these brackets.
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Try Velcro. You can attach a 6-foot strip on the bottom of the long edge of one mattress. On the bottom of the long edge of the other mattress, you sew pieces of Velcro that stick out from the side so they can reach the first mattress. To attach, you set down the mattress with the pieces sticking out, and you lower the other mattress on top of it. The Velcro should keep them from sliding apart.
It also might help to sleep "the other way", so the space between mattresses is crosswise rather than longwise.
Use a fitted sheet that is made for the size of the two mattresses. If one of them does not do the work, use one from the bottom up and a second from the top down.
More tips in this related (but really different) question on Travel Stack Exchange.