Learn what the building code is for your municipality for building onto your home. Fill out the paperwork for any building permits.
Locate underground utilities. Call the utilities companies that service your home to mark buried lines. This can help you decide where to place your screened porch.
Build the Foundation
Use an existing deck or cement slab patio to build your DIY screen room pr build the foundation of your screened porch. Another option is to make a screen room out of a covered porch. Make sure you square the corners. The rest of the construction should be much easier if the base of the screen room is in alignment.
Select wooden materials for the flooring as well as the rest of the DIY screen room from treated wood or wood that is naturally resistant to decay, such as redwood or cedar.
Stain or paint the wood before you use it to save time at the end of the project. This ensures you cover any wood that might have water exposure.
Erect the Walls
Plan the spacing of your support posts carefully. Know what size of screen material is available as well as the available widths. You can cut down the width of a length of screen, but it’s hard to splice screen to put into a gap that’s too wide.
Add extra support to the frame for doorways. Brace all the walls adequately.
Attach the screens to the frame.
Roof the Room
Select the type of roof covering you want. If you are using an existing covered porch for your DIY screen room, you can skip this step. Otherwise, you can choose traditional roofing materials such as shingles or you can select one of the many metal roofing options available on the market.
Determine if you want a flat roof or one with slopes to match angles on the house’s roof.
Connect the roof to the house with appropriate anchors. You can install a sill plate between the top of the walls and the house. Then attach the rafters to the sill plate if you are building a sloped roof. Complete the roof once the rafters are in place.
Finish Your Room
Touch up any scuffed paint. Run electricity to your screen room if you desire.