Remember to raise the tie-in framing on the existing house roof ¾ in. above the porch framing to compensate for the difference in thickness of the 3/4-in. plywood and 1-1/2-in. roof boards, so ...

The cost of a roof or cover for your screen porch depends on the material — $4-$9 per square foot for wooden shakes, $14-$22 for an aluminum cover and $16-$30 for asphalt shingles, according to ...