How to Convert Your Porch Into a Sunroom

Remove the previously installed screen panels. Remove the molding that held the screen panels in place by firmly pulling it. Use a hammer to tap the frame to loosen and release the old screen panels.

Install a bottom plate before building a wall for your sunroom. Lay down two pieces of 2 by 4 boards that are cut to fit, between the two posts. Place one piece of board on top of the other. Drill through three sections of the boards--one hole on each end of the board and one in the center--just far enough to make a locator mark onto the concrete. Remove the boards and use a hammer drill to finish drilling the holes into the concrete. Use a hammer to drive the expansion bolts into the holes, then place a piece of insulation foam over the bolts. Place the two pieces of boards over the bolts. Insert washers and nuts over the bolts and tighten them with a socket wrench. Use scissors to trim excess foam away. Repeat the same steps for the other side of the porch.

Frame the walls for your sunroom by nailing two vertical 2 by 4 boards to each of the posts. Place a piece of 2 by 4 board on top of them, then nail it down securely. Place additional studs every 16 inches and nail them down, at both the top and the bottom. Repeat the steps to complete the next side of the porch.

Apply plywood sheeting to the exterior of the soon-to-be sunroom. Measure the plywood sheeting to fit and nail them securely in place.

Apply weather wrap to the exterior of the plywood to protect your new sunroom from wind and moisture. Use a hammer tacker or staple gun to attach the weather wrap to the plywood, then tape the seams to keep them in place.

Seal the window and door frames for your sunroom, using aluminum tape. Apply strips of aluminum tape over the window and door frames, as well as eight inches up the sides. Cut the corners of the tape, then fold them at the edges.

Install the windows and doors for your sunroom. Unfold the flange on your window and apply a thin bead of silicone to it. Get someone to help you lift the window. Tilt the widow so that the bottom goes into the window sill first. Firmly push the top of the window forward until it snaps into place. Insert nails into the flange and also through the wall.

Install exterior trims around your windows. The exterior trims should have a drip edge to prevent water from flowing back into the wall. Pieces of 1 by 6 boards can be used to fill all the spaces between the windows for your sunroom.

Convert your porch into a sunroom by installing exterior siding and insulating the walls. Apply fiberglass insulation and staple them in place. The vapor barrier on the insulation should be facing the interior of the sunroom. Cut out the necessary spaces for electrical outlets using a utility knife.

Measure and cut the wallboard for your new sunroom. Use screw gun to screw the pieces of wallboard into place. Cover the heads of the screws using a joint compound and drywall tape. Press the tape over the compound using a putty knife. Apply this step until all the screw heads are concealed. Finally, apply interior trim to completely convert your porch into a sunroom.