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.

Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge. Sometimes an intersecting roof is framed over the existing main roof deck rather being tied directly into the framing of the main roof. Roof framing rafter layout. 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. Mark the inside edges of the dormer s sidewalls in chalk. Over frame in my mind is to over build something for no apparent reason. My crew framed partitions in the former screen porch while the foundation for the new addition was being built.

How to install a roof over an existing roof. Overframe on a set of plans means to build on top of another structure such as has been defined earlier. Roll the tarp up so you will be prepared in the event of rain. Position the square at the end of the rafter board with the tongue on your left and facing away from you.

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. 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. 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. 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.

Remove the shingles and the sheathing board from the area of the roof where the dormer will constructed. Add the length of the overhang beyond this mark and. 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. Framing a roof is the last step in framing new construction.