Buy sturdy rope nylon or polyester based put a piece of rope on the roof of the car that goes from back bumper to front bumper.
Tie mattress to roof rack.
Still there is a basic method to follow when tying a mattress to the roof of a car.
What types of tie downs work best.
Use a tie down that wraps around the item and the rails.
Pull the rope tight so there is no extra slack.
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.
More is better in this case.
While tying a mattress straight onto the roof of your car is fine if you do it properly a roof rack is always better.
Mattresses are large bulky and can pick up resistance from the wind.
Wrap lumber in a tarp to secure it and place a blanket down on the roof under the load to avoid scratching your vehicle s paint.
Center the mattress in the middle and put the rope over the length of the mattress.
If you do secure your mattress to a roof rack or safely in the bed of a truck strap it down with ratcheting straps.
Sleepy sal episode 4 is here.
On each side of the roof you ll see a rack that runs the length of the roof of the vehicle.
Quick 1 5 minute video with one way to tie down a mattress.
Paint is slippery and no matter how tight you tie it the mattress will shift when you brake suddenly and when cornering.
Make sure you tie the mattress to at least three or four solid points.
Secure the front end of the mattress and then the other end of the mattress.
With the third option crossbars with side rails you can secure an item to the side rails and run tie downs from front to back securing them to the crossbars.
This will stress any knot no matter how securely tied.
Tie down the boards lengthwise and widthwise similar to how you d secure a mattress.