When sheathing a roof, the first step is to snap a line so that the first row goes on straight. But if you snap it at 40 inches, then the sheathing will not project over the subfascia or true fascia. This opens the door to the possibility of water damage by letting gravity work against you.
Does sheathing overlap fascia?
Notice that when the fascia is placed, the top edge of the fascia is even with the top of the sheathing. In view B, the sheathing overlaps the tail end of the rafter by the thickness of the fascia material. You can see that the edge of the sheathing is flush with the fascia.
What goes on after roof sheathing?
Plywood or oriented strand board (OSB) sheathing will be applied to the exterior walls and the roof to seal off the inside. After sheathing, house wrap (a protective barrier that prevents water from entering the structure and causing mold or wood rot) is also applied.
How far should sheathing overhang fascia?
The best installation method is to leave a gap between the drip edge and the fascia board, about the width of a finger. The shingles should also overhang the drip edge 3⁄8 to 1/2 an inch.How much should a gutter overhang?
A safe distance between the gutter and the roof edge should be between 2 to 3 inches. If the gutter distance is more than 3 inches, the rain will run off the roof and won’t drain properly.
Does roof sheathing go on top of fascia board?
When sheathing a roof, the first step is to snap a line so that the first row goes on straight. But if you snap it at 40 inches, then the sheathing will not project over the subfascia or true fascia. This opens the door to the possibility of water damage by letting gravity work against you.
Do I need a Subfascia?
Though not required by building codes, the reasons for subfascia have more to do with evening out the rafter tail irregularities and providing structural support for the roof edge and gutters. … Another reason many trim manufacturers include 2x subfascia in their installation details is for gutter support.
Do you install fascia before roof?
Fascia and soffit are installed after the roof installation is finished. It is ideal that soffit and fascia materials be installed before you place tiles or any other type of roofing material on the roof. … The fascia board is the long straight one that you will find running along the roof’s lower edge.What side goes up on OSB plywood?
OSB roof panels should always be installed with the grade stamp facing into the attic and the screened surface (with the nail guide lines) facing up.
What is sheathing plywood used for?Sheathing: Standard construction plywood used for wall sheathing, roof decking, floor structures (subflooring) and general rough construction where looks and surface imperfections aren’t important.
Article first time published onWhat is the difference between sheeting and sheathing?
As nouns the difference between sheathing and sheeting is that sheathing is something that wraps around or surrounds something, as a sheath encases its blade while sheeting is fabric used to make sheets (bedding).
How is fascia attached?
The fascia board is nailed to the rafter feet and usually has a rebate or lip for the soffit boards to slot into. They are then either fixed to a batten that is attached to the brickwork, or sat on top of the last course of brickwork.
Are H clips required for roof sheathing?
H-clips are referred to in the APA Guide as “edge support.” For the most common roof sheathing in our area, which is 1/2” nominal (7/16” actual) sheathing over trusses or rafters at 24” on center, there is no requirement for H-clips. … One or two H-clips will often allow a longer span between roof trusses/rafters.
Does roof sheathing need to be staggered?
Staggering panels by at least two supports is recommended. During the installation of OSB, the rough surface side should be facing up. This rough side is a screened or skid-resistant coated side. The panels should be spaced 1/8-inch apart at the ends and edges.
Can you put plywood over plywood on roof?
The new plywood will have to be nailed to the rafters or roof trusses. … But, with the old plywood left in place, it will be considerably more difficult to locate the rafters to ensure proper nail placement.
Does the gutter go behind the drip edge?
It is recommended that gutters are placed under or ‘behind’ the drip edge of your roof. … If gutters are installed below the drip edge, water can drip behind the gutter and cause damage to the wood supporting the gutter system.
Can a Neighbours gutter overhangs my property?
Legally speaking, you own the airspace above your land, thus your neighbours guttering should not overhang on your property and they are trespassing.
What is sub fascia for?
The sub-fascia (or rough-fascia) is part of the framing. It supports the roof sheathing at the eaves, and provides backing for the gutters. That said, many older houses, or those with exposed rafter tails, don’t have a rough fascia.
What is the purpose of a sub fascia?
A fascia board’s primary function is to protect your home from interior and exterior moisture-related damage by preventing water infiltration. This is why it is critical that the fascia board adequately supports the gutters and keeps them in place.
What kind of wood is used for sub fascia?
Many different types of wood are suitable for fascia boards. Spruce, pine and fir are all popular and relatively inexpensive options. However, some roofers prefer to use cedar, cypress or redwood for fascia boards. While they are more expensive, these woods better resist moisture, even when left unsealed.
How far do you overhang shingles?
Shingles should not extend more than 3/4” (19 mm) past the drip edge. If shingles overhang the edge of the roof by more than 3/4” (19 mm), then they are not supported and may crack and break off.
What is roof overhang?
The roof overhang refers to how much the edge of the roof goes beyond the house siding. Under the overhang is a structure known as the soffit. Most homes have an overhang, however, length varies greatly depending on the architectural style of the roof, with slate roofs having longer overhangs typically.
Is OSB stronger than plywood?
OSB and plywood offer similar (and sufficient) performance in terms of strength and functionality, though plywood is about 7% stronger. … Plywood will absorb moisture quicker than OSB, but consequently it will also dry quicker.
What happens if you install subfloor upside down?
Upside-down Installation: Panels may be sanded on one or both sides. … Installing some panels with the trademark side up may result in a slightly uneven surface. If bulk water is present on the subflooring panels, drill drainage holes or sweep the water off.
Is OSB board better than plywood?
Osb is stronger than plywood in shear. Shear values, through its thickness, are about 2 times greater than plywood. This is one of the reasons osb is used for webs of wooden I-joists. However, nail-holding ability controls performance in shear wall applications.
Do fascias or soffits go first?
What is a soffit? Soffit, or soffit boards, are similar to fascia, but instead of running parallel to the walls of the building, they are installed at a 90-degree angle to the walls. Soffit boards are fitted underneath the fascia boards, to fill the gap between the fascia and the wall.
Is plywood sheathing better than sanded plywood?
Sanded plywood features face and back (top and bottom) plies that are sanded in the manufacturing process. It is typically used where it will be seen such as for cabinets, shelves and paneling. … Plywood sheathing or structural plywood is designed for permanent structures.
What is the difference between sheathing and regular plywood?
The biggest difference between the two panels is how they react when exposed to large amounts of moisture over extended time periods. … When used as a roof sheathing, this tendency to hold moisture means it can degrade faster than plywood when exposed to chronic leaks.
What is the difference between sheathing and underlayment?
Basic Floor Construction Considerations Rated Sheathing or Sturd-I-Floor may be used with an underlayment for vinyl, ceramic tile or fully adhered carpet. An underlayment is optional for Rated Sheathing or Sturd-I-Floor when used with hardwood.
Is sheathing structural?
Exterior wall sheathing is either structural or non-structural. Structural exterior wall sheathing ties framing studs together, making the walls resistant to twisting and bending. However, most structural exterior wall sheathings lack insulation value.
How thick should wall sheathing be?
The U.S. Department of Energy has determined that 7/16-inch sheathing is the minimum appropriate thickness for structural wall sheathing with an exception for gable end walls, where the minimum thickness is 3/8 inch.
