VEVOR Awnings for Door Entrance, 38 x 78 in, Exterior Front Door Window Awnings with Drainage & Metal Bracket, Rain Snow Sun Protection, Overhang Polycarbonate Door Canopy for Porch Patio, Brown

Yes, you can connect multiple units together.

No, you don’t need alternative screws. This awning kit includes two types of mounting screws — one set is specifically designed for wooden walls. You can use the included screws directly to mount it on wood.

You can install this awning on vinyl siding. Please note: do not mount the brackets directly on hollow vinyl siding. You need to add a solid wood backing board behind the vinyl siding first, then use longer screws to fix the metal brackets firmly on the solid structure for safe installation.