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Why Factory Built Stairs versus site built stairs?
Consistency
- Every stair built same way.
Quality
- Precise, engineered computer generated rise/run calculation and cut for any site condition.
- Treads, risers, and stringers are nailed and screwed together as one unit, instead of pieced together at site.
- Treads and risers are encased by precision routed LVL stringers instead of nailed to 3 individually cut (and slightly different) 2x10 stringers underneath.
- Site stringers must be reinforced with "sistered" 2x4 to regain strength lost by deep tread and riser cuts. Frequently "oversawn", further reducing strength.
Appearance
- Factory stair stringers serve as skirt board because treads and risers are routed into it. Site stairs require costly 1x12 skirt to trim out ends -- difficult to cut precisely and gaps are common.
Cost
- Equal to or lower than site built. Can be a lot lower, depending on framing and trim carpenter's skill level.
Why RBI factory built stairs versus other factory built stairs?
- Primed LVL stringers instead of unimproved lumber.
- Solid yellow pine treads instead of particleboard or MDE.
- Smooth plywood instead of rough OSB for risers.
- Stainable oak treads are protected with hardboard tread covers.
- Oak cove mould under stainable oak treads.
- Engineered PVC wedges instead of hand cut wood wedges to insure tight, squeak proof joints.
- Glue blocks on all riser and tread joints.
- Every stair is accurately measured and custom built.
- Faster lead times.
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Examples of Shop Built Stairs
Straight Box |
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"L" Stair |
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Scissor Stair |
Stairs with no platform or turn. May have wall on both sides, one side or variation of the two. |
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Stairs with one platform or turn. May have wall on both sides, one side or a variation of the two. |
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When the lower level stairs share a common wall with the upper level stairs. |
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