Sheathing Design
Essential principles of roof sheathing.
-
Load Requirements
Dead loads, live loads, and wind uplift. Consider climate conditions.
-
Panel Selection
Material grade and thickness requirements. Performance ratings.
-
Support Spacing
Rafter or truss spacing impact. Consider deflection limits.
-
Edge Support
Blocking requirements and panel orientation. Load transfer paths.
Material Properties
Panel Types
Plywood vs. OSB characteristics.
Exposure Rating
Weather resistance requirements.
Span Rating
Load capacity and support needs.
Edge Treatment
T&G vs. square edge options.
Installation Methods
-
Panel Layout
Stagger end joints and maintain proper spacing. Consider expansion.
-
Fastening Schedule
Nail size, spacing, and pattern requirements. High-wind considerations.
-
Valley Treatment
Panel cutting and support at valleys. Ensure proper drainage.
-
Ridge Details
Ventilation provisions and panel alignment. Maintain structure integrity.
Protection Measures
-
Weather Protection
Temporary covering and exposure limits. Prevent moisture damage.
-
Ventilation
Attic ventilation requirements. Control moisture buildup.
-
Fire Resistance
Code requirements and treatment options. Consider assembly ratings.
-
Quality Control
Inspection points and documentation. Verify proper installation.
Sheathing Factors
Key factors affecting roof sheathing installation.
- Panel Type Affects durability and cost.
- Thickness Impacts strength and span.
- Installation Method Affects performance.
- Weather Protection Required accessories.
Installation Tips
Spacing
Allow for expansion.
Nailing
Follow pattern specs.
Support
Use H-clips as needed.
Weather
Plan for conditions.