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Installation Quick Links

How to calculate coverage areas

Recommended Siding Nails & Applications

Siding installations at  corners, dormers and roof junctions

Installing Bevel Siding
Installing Board Siding
Installing Shiplap Siding
Installing T&G Siding

How to finish solid wood siding



Product Quick Links

Bevel Siding
Board Siding
Log Style Siding
T&G and Novelty Siding

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Wall Construction & Design Considerations

Wall Construction Diagram

Vapor Retarders

It is necessary to design walls so that moisture vapor does not enter and condense within the exterior wall cavity. Proper design will ensure the insulation's thermal efficiency and the overall structure's performance. Design must provide continuous vapor retarding equivalent to a rating of 1 perm installed on the living space side of the insulation.

Vapor retarders are also required on the ground in all crawl spaces and under concrete slabs. Acceptable products include: 6 mil polyethylene, asphalt impregnated kraft or foil-backed insulation (tabs must be stapled to the narrow face of the studs, not to the wide face), vinyl-faced or foil-backed gypsum, sandwich-type kraft with an asphalt or polyethylene core, or equivalent. Vapor retarding paints are also available for interior walls.


Site Drainage

Slope ground away from structure for a minimum of 3 feet.


Roof Drainage

Incorporate an overhang or drainage system into the structure design to prevent water from running down sidewalls.


Ventilation

Both attics and crawl spaces require adequate ventilation. Clothes dryers must be vented outside; kitchen and bathroom fans are recommended to vent localized moisture outside.

Attics. Attic vents should provide a minimum of 1 square foot of net free vent area for every 150 square feet of attic space. Unrestricted air circulation is best achieved by a combination of soffit vents and ridge or roof vents.


Crawl Spaces

Crawl space vents should provide a minimum of 1 square foot of net free vent area for every 25 lineal feet of exterior wall. They should be placed to allow for cross-ventilation.


Siding Return at Roof (Dormers)

Use flashing, allowing at least a 2-inch clearance between siding and roof line. Cut edges of siding must be finished in accordance with finishing instructions described in this guide.

Siding Installation at Roof & Domer Junctions

Sheathing

It is recommended to apply cypress siding over standard sheathing material with maximum stud spacing of 16 inches on-center. Where building codes permit, siding may be applied over unsheathed walls. A suitable building or felt paper wind barrier is recommended and must be used where building codes require.

Foam and Foil-Faced Sheathings. Both rigid foam and foil-faced sheathings can be vapor barriers. Rigid foam sheathings, however, offer no resistance to sag caused by the weight of the siding on the nails. For application of cypress over rigid foam sheathing, use angular threaded ring shank nails long enough to penetrate at least 1 inch into framing members. For example, siding over 1-inch foam requires a 3-inch nail (10d).

click here for more information on nails & recommended applications.

Note: Wood siding applied over foam sheathing may take on a wavy appearance if the siding is compressed by nailing with too much force.

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