Deck irregularity is defined as being out of plane more than 1/8” in 10’-0” & ¼” in 20’-0”
- Longitudinally (eave to ridge)
- Latitudinally (gable to gable)
- Or Both
Other Irregularity Factors
- Underlayments
- Aged material
- Improper attachment method used
Corrective Action Techniques
- Ultimately the contractor has the responsibility to go back to the building owner with the irregularities on the particular project prior to installation of panels
- Inspect the deck for deflection and undulation
- Properly install the correct underlayment
- Utilize Above Sheathing Ventilation shim or Glass and Glazing shim where necessary
- Choose a high quality factory manufactured panel
- Use proper clip/fastener placement
- Use proper tools for attachment, don’t overdrive fasteners
Causes of Deck Irregularities: Rafters (steel & wood)
Causes of Deck Irregularities: Decking
Corrective Action Techniques: Stucco Embossed
Corrective Action Techniques: Striations
Corrective Action Techniques: Pencil Ribs
Use of backer rod or other similar shimming materials
Measuring for Irregularities