Sloped Porch Roof Framing

This sizing guide for roof rafters will help determine what you need for your small project.

Sloped porch roof framing. This is denoted two ways a 1 3 or 1 4 pitch in fractions and a 6 12 pitch in inches which means the roof rises 6 inches for each 12 inches of run. Hip roof construction is one of the most popular methods used for both porch and screen porches. After installing the rafters we still had to extend the porch roof back over the shed roof creating a valley on either side. Per foot this is called a 5 12 slope and extended 18 in.

These illustrations above show the plans for the screened in porch deck framing gable framing ledger truss block side walls and the end wall. Blind valleys simplify framing. Your roof may vary from this and the details of how the porch ties in will vary as well. It is used where large buildings are framed under one roof where hasty or temporary construction is needed and where sheds or additions are erected.

à explore the differences in enclosure design and ventilation requirements for roofs with attic insulation vs. The house roof sloped 5 in. There are several variables to consider when determining the proper rafter size. Continuous insulation on top of the deck.

Calculating loads on sloped roofs framing. Frame assembly affect moisture presence movement and evaporation. When building a porch roof with trusses on this type porch the corner and subsequent trusses are built a little differently due to the slope of the roof. Weather you re building a shed roof or adding a dormer to your second story it is important to choose the proper size rafter.

As you can see the truss angles are constructed to maintain the same slope. Hip roofs allow for extended depth. Next soffit framing is installed along the roofs edge. Pitch is the amount of angle or slope the roof has.

It has been too co. The shed roof or lean to is a roof having only one slope or pitch. To a large extent they are self bracing with opposite ends pushing inwards so they are strong in relation to wind forces. To keep the porch roof framing as simple as possible we installed a structural ridge supported by posts at each end with the common rafters landing on top of the ridge.

à highlight detailing best practices for vented low slope roofs to avoid moisture traps and ensure material longevity. More project and tips. A framing square is traditionally used for laying out the roof and determining pitch.