Sloped Porch Roof Framing

à explore the differences in enclosure design and ventilation requirements for roofs with attic insulation vs.

Sloped porch roof framing.

à highlight detailing best practices for vented low slope roofs to avoid moisture traps and ensure material longevity. Calculating loads on sloped roofs framing. 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. Continuous insulation on top of the deck.

Blind valleys simplify framing. Per foot this is called a 5 12 slope and extended 18 in. 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. The roof is held up by walls or posts where one wall or the posts on one side are at a higher level than those on the opposite side.

The shed roof or lean to is a roof having only one slope or pitch. Q a calculating loads on sloped roofs four engineers shed light on common framing mysteries myths misconceptions by christopher deblois scott mcvicker login or register to download the pdf version of this. 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. Frame assembly affect moisture presence movement and evaporation.

Hip roofs are sloped from each wall and do not have the gable ends. More project and tips. As you can see the truss angles are constructed to maintain the same slope. A framing square is traditionally used for laying out the roof and determining pitch.

Hip roofs allow for extended depth. To a large extent they are self bracing with opposite ends pushing inwards so they are strong in relation to wind forces. There are several variables to consider when determining the proper rafter size. 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.

After installing the rafters we still had to extend the porch roof back over the shed roof creating a valley on either side. The house roof sloped 5 in. It has been too co. Next soffit framing is installed along the roofs edge.

These illustrations above show the plans for the screened in porch deck framing gable framing ledger truss block side walls and the end wall. Pitch is the amount of angle or slope the roof has. Your roof may vary from this and the details of how the porch ties in will vary as well.