We purchased roll up vinyl curtains for our large porch from Piedmont Enclosures last April and are delighted with them. This winter, with the curtains closed and 2 small heaters, we were able to get the temperature to comfortable 70s and used the porch frequently. When the South Carolina pollen starts in the spring, we have always covered everything on the porch, closed it until the season ended and then spent hours cleaning up the yellow mess. This time, with the curtains, not a speck of poll