How do I winterize my screen porch?

Try looking into transparent multiwall polycarbonate panels, they come in a variety of colors.

Plastic is cheap and is normally good for one year. If you want something more look around for inexpensive sliding glass doors and install them.

My husband and I did this for a number of years. We bought very heavy weight plastic at the hardware store and used battens to hold them in place with screws. Our porch is 7' X 14' so we cut the long plastic to fit and also the narrower sections. We washed the plastic (machine) and line dried it to store for next winter. Our porch was redone in 2017 and new screening does not lend itself so easily to this being done, but it did work, since the plastic is thick it kind of was opaque.

I buy our heavy duty plastic at Joanne's Fabrics...use the half price coupon.....we use firing strips to attach.... the plastic lasts almost forever.

Good luck.

We close in our outdoor patio every year. You can buy construction poly 6 mil at Home Depot. It comes in a large roll and different sizes. Measure your space and cut your plastic to the appropriate length. We attached our plastic to strapping using a staple gun, then used screws to hang it. In the spring we just roll it up and store it for the following winter. We get a lot of sun on our patio in the winter and have actually been able to sit on our patio wearing light jackets in the winter which has been nice.

Visqueen. Make panels like a picture frame

Don't remove or take the plastic down. Roll it up and hide it behind a valance. Tie with ribbon or string.

I did the plastic thing last year and it was always coming partly off and flapping in the wind. It was awful. Since I'm not concerned with the porch being air or moisture tight, THIS year, I'm using burlap. I'll let you know how it goes.

Make a wood frame for the plastic then screw each panel in.

My thoughts are filling around the entire room with wood, permanently, and leaving all the windows open and let the sun in to heat it. Maybe a couple sky lights? It is a very nice, large room to enjoy with all seasons.