How To Overframe A Roof

Installing a new roof over an existing one also called a layover or nailover is often possible although not always the best option.

How to overframe a roof.

Roll the tarp up so you will be prepared in the event of rain. My crew framed partitions in the former screen porch while the foundation for the new addition was being built. Roof framing rafter layout. Position the square at the end of the rafter board with the tongue on your left and facing away from you.

A roof having an 8 span framed with 2x12 rafters is over framed unless it was done to achieve a specific purpose such as r value. In this case the new roof s ridge is attached to. Over frame in my mind is to over build something for no apparent reason. This new roof with a higher pitch can be accomplished with premade roof trusses and typical asphalt shingles.

Remove the shingles and the sheathing board from the area of the roof where the dormer will constructed. In a pure cross gable roof two ridges both at the same elevation intersect at 90. Replacing a roof can be expensive but if a roof contains only a small slope it s possible to raise the roof pitch of a house by building a roof over the old one. Overframe on a set of plans means to build on top of another structure such as has been defined earlier.

Affix the tarp to the roof screwing a 2 by 4 5 08 by 10 16 cm over it. From one end of the rafter material using a speed square or framing square mark an x in 12 angle on the rafter and cut it measure down y height from the long point of the rafter cut and make a mark. While most home builders will outsource the construction of roofing trusses the rafter supports of the roof itself learning to frame a roof yourself is one of the true arts of carpentry and a basic primer is covered below. Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge.

As the blockwork was finished and floor framing began i retired to a shady spot on the driveway to lay out and cut the principal roof members. Framing a roof is the last step in framing new construction. This will the first point of the rafter measurement line using the results of your rafter length calculation measure from this point along the rafter measurement. Sometimes an intersecting roof is framed over the existing main roof deck rather being tied directly into the framing of the main roof.