I'm planning to build a privacy screen to be attached between two posts of the pvc railing of a composite deck. I want the attachment to be temporary so that it can be removed and stored during winter months. The privacy screen will be approximately 6 feet wide and 6 or 7 feet tall. I would like it to be made with boards 4" to 6" wide by 6 feet long placed horizontally across the 6 foot width (like a horizontal fence). There will be a space of an inch or two between each board.
I'm looking for material suggestions. I would like to use composite decking for this but the boards are very heavy. I'm considering using PT pine boards but I don't know if I'm overlooking better options in lumber or in a lightweight composite material that I am unfamiliar with.
I prefer to see the wood grain so stain rather than paint and prefer the wood to be free of excessive knots. The boards can be as thin as possible while remaining sturdy. I would guess no less than 1/2 inch thick. Over the 6 foot length, I'm planning to have 3 or 4 vertical supports - something like 2x3s.
I would also like some suggestions on temporary fasteners. I am considering heavy duty wire ties to avoid drilling into my posts. Any other ideas?