A gable roof is a roof having two sloped panels which will meet up at the peak or ridge and will be resting on the top plates of the two parallel exterior walls. In case of wood frame construction, the primary members of the structure of the gable roof are rafters and ridge board. The lower section of your roof rafter which is also known as rafter tail gets extended beyond the exterior wall; this projection will result in forming an eave or overhang. You can even shorten the eaves of the existing frame of roof by cutting the rafter tails back. You can also enlarge the eaves by installing a scab or sister rafter tail extensions on the existing rafters in line with roof plane. Even if you are doping remodeling or going for new construction, the construction and assembling of eave is done in the similar manner only. Rafter tails end part is shaped by 2 cuts which can form the corner of the right angle. When you install the rafter on the roof, the level cut of bottom part upon which the soffit is installed is now installed in the horizontal manner. The end of the plumb cut is placed in the vertical manner upon which fascia is nailed. The length of the overhang or the size of the eave is decided when the pattern is laid for precut roofing rafters. When all the rafters are in place and the sheathing is also installed on your exterior walls, you are then ready to proceed with the first step. Before you start with the process of building eaves for gable roof, you need to collect all the supplies and start with the process. It is really very disturbing to leave the process of building eaves for gable roof in the middle and go for buying some of the supplies. To avoid such situation gather all the supplies beforehand only and speed up your process.
Supplies needed for building eaves for gable roofSoffit material
- Circular saw
- Measuring tape
- Chalk line
- Framing lumber
- Finishing nails
- Framing hammer
- Fascia boards
Step 1: Align your rafter tails
Check out your rafter tails and see whether they are aligned or not. You also need to have a look on the plumb cuts and nail a linear to each and every rafter tail. This should be of 10 feet in size or more than that. Also have a look at the edge. If you see the large bows then it will indicate those places where you need to trim the rafter tails.
Step 2: Join a Nailer board
Once you are sure that the fascia will go straight only, align the bottom edge with the level of 2 foot by using level cut of rafter tail. Use a pencil and mark on the sheathing where horizontal line would be meeting up with the exterior wall. Make sure to this to every fourth and fifth rafter and even snap up a chalk line which will connecting to that specific mark. Make sure to align the bottom edge of the linear with the chalk line and also ensure to nail it flat with the exterior wall with the sheathing in the studs for the whole length of the wall. This is the nail by which you are going to nail the lookout blocks. The nailer will be installed before the exterior wall material where the siding is applied so that the wall material is installed properly against the wall.
Step 3: Attach lookout blocks
Take a flat lookout board and level it properly against the side of a rafter tail. Make sure to attach it perpendicular with the nailer. Scribe the lookout blocks and cut it properly with the plumb cut. If there is penetration in the upper corner of the lookout blocks of the roof plane then it will have to be cut down. If you are making use of this block as template, you have to cut each and every block for every single rafter tail. Level up each block by making use of 2 foot level and install these lookouts into nailer by toe nailing it with the block into the rafter tail.
Step 4: Attach the fascia boards
The fascia boards must be installed with the plumb cuts. These boards can differ in size and it can be made up from any composite material or from wood. The top edge of the fascia should be made even along with the top corner of the rafter tail and it should be nailed up into each rafter tail by using finishing nails which are headless. There should be an extension in the bottom edge of fascia by considering the bottom edge of rafter tails for providing a ½ inch lip after installation of soffit. See along the top edge of the fascia for making sure that goes on straight.
Step 5: Attach the soffit
The last step of building eaves for gable roof is to attach the soffit. You have to fasten the soffit on the lookout block that too on the bottom edge of it. The soffit can be prepared from perforated vinyl or solid wood. The perforations are designed so that it can vent the attic air and send it to the outside part of it. The eave that overhangs from the gable end is usually referred as a rake. It is prepared by extending ridge board beyond the level of gable end. This will double the last rafter and provide it a nailing surface and attach one of the additional rafters at a distance which is equal to the desired overhang. It is properly secured with the frame by using lookout blocks which is nailed perpendicular and flat with 2 flat rafters and flushed with the top edge of the rafter. For keeping the blocks in line with the roof, the rafters are notched properly. Fascia and soffit are installed directly in the end rafter.