Tying into the pre existing roof structure for a screened porch that looks original to the house the best option is to tie into the pre existing roof.
Screen room roof options.
Insulated aluminum screen room roofs are much thicker and as the name implies there is a layer of insulation between the room and the aluminum covering.
You may have a roof overhang beyond the the screen walls of up to 2 feet.
This gives you additional weather protection and allows you to control the aesthetics of your room.
The next type of screen enclosure we are going to talk about are screen enclosures.
You get foam core expanded polystyrene roof panels in a combination of 4 wide and or 2 wide depending on the width of your unit a beam which is the appropriate size for your load requirements rear extruded and thermally broken header side extruded fascia front extruded gutter posts with top and bottom brackets lags for panel to beam connection sealant tar tape drain scuppers all necessary hardware and touch up paint.
White aluminum frame with single slope roof.
Sandstone aluminum frame with single slope roof.
Pan aluminum screen room roofs offer the best snow slide off and because they re so thin they keep your screen room warm all summer long.
First up are under truss screen enclosures.
Sandstone aluminum frame under existing roof.
Some people refer to them as a screened in.
3 types of screen enclosures and what they cost under truss screen enclosures.
Sandstone aluminum frame under existing roof.
For example if your wall foot print is 11 6 out x 13 wide your roof will have a minimum measurement of 12 x 14.
White aluminum frame with single slope roof.
The minimum roof overhang beyond the screen walls is 6.
This may be an additional expense but it also has the benefit of increasing property values.