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smart comfort calls
LDD-19 · Doors + Stairs
One-line intent
Consistency > uniqueness for doors; comfort + openness for stairs.
Doors
| Spec | Value |
|---|
| Height | 84" slab doors |
| Construction | Solid core |
| Style | Flat, minimal |
| Cost target | $50–$150 per door |
| Rule | Consistency > uniqueness |
Stairs
| Spec | Value |
|---|
| Risers | 21 |
| Rise height | ~6.85" |
| Tread depth | 11" |
| Width | 54" (generous) |
| Run | ~18' |
Open items / engineer review
- Total door count (likely 25–40 doors)
- Door hardware spec (matte dark? brass with patina?)
- Stair construction (wood treads + steel stringers?)
- Stair handrail + guardrail (steel + wood cap per LDD-18)
- Code compliance (6.85" + 11" formula 17.85" — usually compliant)
- ILS aging-in-place — confirm ground-floor-only
Cost drivers
Doors: 25–40 slabs $1.25–6K · hardware $0.5–3.2K · install $5–16K · specialty doors $3–8K. Total doors $10–35K. Stairs (54" wide × 21 riser × 18' run): $12–28K. Combined: $22–60K.
Air-gap concerns
- "Consistency > uniqueness" easy to break. Don't make the master door special.
- 84" doors at IMP exterior need taller rough openings + head flashing detail.
- 54" stair width may trigger dual-handrail code in some jurisdictions.
- Open stair from 21 risers up = serious fall risk for kids. Spec guardrail height per code.
- Stair acoustic — 54" wide stair conducts sound up/down. Closed risers + carpet runner help.
Cross-references
← Inputs from
LDD-18 steel + wood cap ·
LDD-08 low-level navigation
→ Outputs to
LDD-17 stair edge lighting