For lumber its fine as long as.
Securing lumber to roof rack.
The lenghts are short enough that the can be secured laterally.
Both water resistant and waterproof bags are available.
Just make sure to follow the same basic principles outlined above.
If you have an suv and need to haul lumber often a trailer would be a better option than a roof rack.
Wood recommends a webbing strap with a fastening buckle that doesn t use a ratcheting system.
The method you use to secure the lumber will depend on what kind of roof rack you have.
For plywood i put two 2 x 4 s on the roof rack and place the plywood on top of those to stiffen the plywood otherwise it flops up and down at highway speeds.
Then i use the nylon web tie downs i ve got in the photos of below.
Remember to place a distance of about 3 to 3 foot in between.
I use 4 hand clamps at the corners to hold the plywood to the 2 x 4 s.
You dont exceed the weight excessively.
What types of tie downs work best.
According to wood ratcheting systems apply a significant amount of crushing force on whatever you re moving so you can go in excess of what s necessary on both whatever you re carrying as well as the vehicle.
Use a tie down that wraps around the item and the rails.
First loop the strap under the roof rack s crossbar and drape the loose ends over your oblong load i e.
Not only that but the cost of a roof rack is easily 5 10 times more expensive than a one day truck rental.
On a roof rack step 1.
For infrequent use though truck rental is a better option.
On each side of the roof you ll see a rack that runs the length of the roof of the vehicle.
Simply wrap each strap around a solid anchor point thread the strap through the buckle and pull until secure.
Ask for help from friends if.
Secure it to the roof rack.
Next pull the long end of the strap under the crossbar on the.
In case you have no idea how much weight your plywood sheet is a sheet of inch plywood is approximately 100.
Oh and remember to.
Some roof bags mount to roof racks or raised side rails some mount to roof baskets and others mount to naked roofs.
Use ratchet straps that can handle the weight of your load and check that the roof rack is secure enough to provide a proper anchor.
Roof racks on small suvs tend to be rather close together so the dont give much holding strength both against lateral movement or vertical movement on anything long.