Step 1 · Measure Angle of Stair Slope
Using a digital angle finder or a speed square, measure the angle of the underside of the handrail where the balusters will attach. This angle is critical for ensuring the balusters sit flush against the handrail and the tread or riser. Record this measurement precisely. If using a speed square, you may need to transfer the angle to a protractor for a more accurate reading. For a consistent angle across all balusters, consider using a jig or a consistent reference point.
Tools and Materials
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