Roof Decking Installation for Pole Barns

roof decking installation

 

FIRST ROW OF PLYWOOD

♦ Use 4x8 inch plywood for base decking material.
♦ Set ladders to allow 2 workers to carry 4x8 plywood to roof.
♦ Measure from rake rafter to rafter that is 6' on center from building edge.
♦ Cut first sheet to overhang rake rafter by 3/4" stopping halfway on inside rafter
♦ Nail sheet with 8d nails every 8"
♦ Nail rest of sheets on first row. Rafters should be 8' on center so no cutting required
♦ Cut last piece on first row to overhang 3/4" on rake rafter
♦ Trim small out of square with circular saw

SUBSEQUENT ROWS OF PLYWOOD

♦ Do not overlap joints on same rafter as first row
♦ Measure and cut from 2nd rafter for second row, third rafter for third row to stagger overlap

FINAL ROW OF PLYWOOD

♦ Last row must be ripped to proper width to extend exactly to peak of roof
♦ If planning a ridge vent leave a 1" gap between ridge board

TAR PAPER / FELT

♦ Steeply pitched roof requiring cleats require installation from top to bottom. Leave bottom edge unstapled to slip next sheet underneath for weather proofing
♦ If cleats are not used then tar from bottom to top lapping rows as you go

FACIA BOARDS & DRIP EDGE

♦ Butt facia boards up under plywood decking & attach to eave rafters and the side of rake rafter with 8d galvanized nails
♦ Drip edge is nailed onto the edge of roof on top of tar paper with 1 1/4" roofing nails driven along back edge

 

Metal Roofing Systems

Planning a metal roof?

Each metal roofing manufacturer provides instructions for specific products sold. Make sure you get a copy with your panels to follow their specific recommendations for application.

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