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Felt underlayment/
Tar paper – Wikipedia
: Felt materials are a traditional underlayment option for cedar shingles made from a base of natural materials like wood cellulose or synthetics like fiberglass and coated with a protective asphalt coating to repel moisture and debris.
Do cedar shingles need underlay?
While cedar is one of the most versatile and durable materials you can use to build your roof, no roofing job is complete without a proper underlayment for protection. Underlayment is placed right over the roof deck beneath everything else, including insulation.
Does a cedar shake roof require underlayment?
Shakes should never have underlayment installed except where an ice barrier is required over solid sheathing. Instead, interlayment is required. Interlayment consists of an 18-inch-wide strip of 30-pound black felt installed between courses of shakes.
What is under cedar shake roof?
Under the Cedar Shakes are furring strips. Furring strips are 4” wide boards that are spaced apart several inches, to hold up cedar shakes while allowing them to breathe.
How much do you overlap cedar shingles?
Cedar shingles should lap at least 18 cm (7 in.) over each side of valley flashing.
Can house wrap be used under shingles?
Housewrap, a common type of weather-resistive barrier (WRB), is installed between the cladding layer and the sheathing, while roofing underlayments go directly under shingles or other roofing material, forming a second line of defense against the elements.
What do you put under wood siding?
Plywood is the most common type of wood used underneath the siding. Plywood is layers of wood cut on a large machine, pressed together under pressure and glued together to form a sheet of wood. Plywood is made from maple, pine, oak, cedar and poplar. Most commonly, plywood is made of pine.
Can you use felt paper under siding?
Felt paper, also commonly referred to as tar paper, is an underlayment material applied to bare walls before siding is installed. Should any water get past the siding, properly-installed felt paper will act as a barrier to keep the water from damaging the wall sheathing or framing.
What kind of wood do you put under shingles?
It’s essentially the foundation of the roof. This is typically made with OSB or oriented strand board or plywood that’s attached with nails onto the rafters. Since it’s made of wood, it will require general roof repair if there’s a leak or water intrusion coming from the shingles.
Can you use Tyvek under cedar siding?
Yes, Tyvek® DrainWrap™ can be used under cedar siding. It is recommended that the cedar siding be installed per manufacturer’s guidelines and recommendations by wood siding associations, such as the Western Red Cedar Lumber Association. This requires priming all surfaces, including the back and ends, before installing.
What is roofing underlayment?
Roofing underlayment is what lies between the shingles and the roof sheathing, or roof deck, which is typically either plywood or OSB. It’s installed directly on the roof deck and provides a secondary layer of protection from the elements, including rain, snow, and wind.
Does drip edge go under underlayment?
According to most building codes and manufacturer recommendations, the drip edge should be installed beneath the underlayment along the eaves of the roof. But over the underlayment along the rake edges of the roof. Understanding the proper way to install the drip edge will only get you so far.
What type of fastener do you use on cedar shingles?
The Cedar Shake & Shingle Bureau prefers the use of nails, however if you choose to use staples they must be stainless steel Type 316 in locations within fifteen (15) miles of salt water. For locations outside of the salt water zone – stainless steel staples Type 304 or Type 316 must be used.
What is the difference between cedar and cedar shingles?
Appearance – Cedar shingles have a smooth and uniform look that spans the entire roof surface while cedar shakes have a more rugged appearance because each piece looks a little different than the rest. Cedar shakes are split off while shingles are sawn smooth on both sides and cut tapered.
Can I use Tyvek house wrap on a roof?
No. Tyvek® breathable roof membranes are suitable for non-ventilated pitched roof applications only. In flat roofing a Tyvek® roof membrane may only be used as a protection layer over insulation or as a separation layer between metal sheeting and a supporting deck.
Can you use synthetic roof underlayment as house wrap?
A. Paul Fisette, director of Building Materials and Wood Technology at the University of Massachusetts Amherst and a JLC contributing editor, responds: Unless you are located in a cooling-dominated climate, I would steer clear of installing a synthetic roofing underlayment in the manner you describe.
Can you use roofing felt on walls?
Yes, you can have felt installed on your shed walls. The primary purpose of the felt is to provide a vapor barrier between your wall and the outside while still having some permeability( the characteristic of a material to transfer water vapor) that lets any moisture inside your shed escape.
Do you need Tyvek under siding?
There are no specific laws or building codes requiring homeowners to install house wrap behind siding. So, in a way, you can get away with not wrapping your house in a protective waterproof barrier. Some homeowners wrongly believe they can save on costs by skipping house wrap when installing vinyl siding.
Do I need OSB under siding?
It is completely okay if you were not aware that there’s no sheathing under siding until you removed it. Sheathing works as a case or cover, structural support, insulator, and more. Missing sheathing is not any structural defect. It’s possible that it was not added to the construction plan.
Do you have to use sheathing under siding?
Most new walls need sheathing to strengthen them, to act as a nailing base for siding, and/or to boost insulation. Existing walls usually do not require sheathing unless you are stripping off the old siding and applying a different type that calls for sheathing.
