I'm following along in a guide to installing a screened in porch and the following photo is shown.
The instructions are 'Secure sole plates to the patio or porch floor using construction adhesive and appropriate mechanical fasteners'
What kind of material is this? Is it just a composite 2x4?
I've heard of ScreenTight screening kits, but they aren't available nearby... are there any other screening kits that you would suggest?