How to Convert Decks to Screen Porches

Check the deck space and support posts for needed repairs. Plan to install extra support columns, if the screen porch will have a heavy roof structure. Install adjustable metal post support columns on concrete pad foundations built under the deck to lend added support, as one option.

Draw the screen porch dimensions and shape on graph paper. Define the screen porch framing dimensions, because this framing will show through any added screening material. Create a framework that looks appealing as a stand-alone unit, so that the curbside view looks well crafted from any angle. Plan to install 2-by-4-inch rafter boards on 16-inch centers. Build wall framing in upper and lower sections, so the screening can be stapled on in separate sections.

Use bolts to secure porch framing to the deck and house framing. Construct the screen porch with extra care, because strong winds can easily wrench the structure loose and hurl it into a neighbor’s yard. Attach the screen porch roof rafters to house roof rafters if the structure is a sizable unit -- such as 10 feet by 20 feet. Connect the screen porch roof to house rafters, also, in case you want to enclose it as a room in the future.

Buy high-quality framing boards, such as Western cedar, to build the screen porch if it shows from curbside. Don’t use cheap pine or rustic materials on an upscale home, or this will negatively affect your home’s market value. Construct the framing and stain it or use porch and deck paint. Add this stain or paint before attempting to cover the porch with screening.

Cover the porch with ½-inch plywood before nailing on construction felt and asphalt shingles. Plan to add guttering on the screen porch, once all exterior screening is in place.

Install screens made in sections from a factory, or use screening material bought by the yard. Use a staple gun to install sections of screening material, leaving a border of 2 inches around each section. Fold the seam under and cover with wood trim to create a neat border for each area.

Build a sturdy screen door for the screen room. Cover the door with screening material and install heavy-duty hinges to protect the door over time.

Install guttering, downspouts and splashblocks to match the home’s guttering system. Connect the guttering in a seamless fashion with house guttering, with no downspouts needed, if the screen room is in the central part of the house facade -- versus located at one end of the house.