Put together your list of required parts to construct the screen enclosure. Remember to include stain or paint for the supports to protect them from the effects of weather. Consider whether you desire plastic screening or a metal mesh for the netting. Measure the area that the enclosure will cover.
Cut the supports for the enclosure. If you plan to have the enclosure removable, then you will need to dig holes at the outer corners of the enclosure to place pieces of PVC conduit to slip the support for the screen into. When you are ready to remove the enclosure for the season, simply pull the supports from the conduit and fold it away for storage in the garage.
Lay out the pieces of support and place the netting over the framework. Secure the netting with small staples or u-shaped nails. Firmly attach the netting to the supports and stretch tightly to keep it from flapping and tearing in windy conditions. Cover each piece of framework in turn.
Install connection points to the house roof to hold the supports for the roof of the enclosure. You can use a small wooden board with half of a hinge nailed down. Nail the matching part of the hinge into the support at the appropriate place to allow it to connect to the mating hinge when present. Slip the retaining pin in the hinge to make the attachment.
Use hinges on all the other supports that mate to another of the supports to allow easy dismantling. Leave extra netting along the edge that runs down the side of the house. This will form a curtain to allow entry and exit from the enclosure.