Place the mattress on the roof making sure it s in the middle.
Mattress and box spring on top of car.
Buy sturdy rope nylon or polyester based.
I have a hyundai accent and need to move a queen size mattress and box spring 50 miles.
Secure your mattress to the top of the car.
Toss the first long piece of rope over the length of the mattress.
During the process of being moved the sides and top of your mattress may come in contact with floors stairs the ground outside and the inside of a moving van or the top of your car.
There should be enough to secure one end under the front of your car and enough at the other end to secure the second end under the back of your car.
While driving with a mattress on top of your vehicle it is a good idea to stick to the back roads and stay off of busy streets just in case something happens.
If so how would be the best way of strapping it down.
Put the mattress on top of the car and rope so that it goes length wise with the length of the car see pics above.
I ve moved a full size mattress on top of the car before easily.
In addition keep an eye on the mattress so you notice if it starts to slip a rope comes loose or the plastic breaks.
Put a piece of rope on the roof of the car that goes from back bumper to front bumper.