View source for SH7/Walls Templates SH7 Ext Wall 10 ft

# Walls_Templates_SH7 - Ext Wall - 10 ft - Build Instructions
> **OSE Seed Home | 10' x 8' Floor Module**
> Auto-generated by OSE Weaver Protocol v2.0 (Platinum Format)
> Date: January 21, 2026

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## 📋 Overview

**Dimensions**: 10' wide × 8' long × ~125" deep
**Assembly Time**: ~2-4 hours (2 people)
**Skill Level**: Intermediate (framing experience helpful)

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## 🔧 Tools Required

| Tool | Purpose |
|------|---------|
| Circular Saw | Cutting lumber to length |
| Drill/Driver | Driving screws |
| Framing Square | Ensuring 90° corners |
| Tape Measure | Measuring / layout |
| Chalk Line | Marking joist positions |
| Level (4') | Checking for level/flat |
| Speed Square | Marking cut lines |
| Hammer | Adjustments, persuasion |
| Safety Glasses | Eye protection |
| Work Gloves | Hand protection |

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## 🪵 Lumber Cut List


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## 📦 Sheet Goods

### Top Sheathing (3/4" OSB)
| Part | Qty | Size | Notes |
|------|-----|------|-------|
| OSB | 4 | 4' × 8' | Top subfloor surface |

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## 🔩 Hardware

### Screws (Recommended)
| Type | Qty | Purpose |
|------|-----|---------|
| 3" Deck Screws | ~50 | Joist-to-joist connections |
| 2" Deck Screws | ~100 | Sheathing to joists |
| 1-5/8" Subfloor Screws | ~100 | OSB to joists |

### Optional/Recommended
| Item | Qty | Purpose |
|------|-----|---------|
| Construction Adhesive | 2 tubes | Glue sheathing to joists (reduces squeaks) |
| Joist Hangers (2x8) | 0 | Code-compliant joist connections |
| Simpson Strong-Ties | 4 | Corner reinforcement |

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## 🏗️ Assembly Steps

### Phase 1: Build the Floor Frame (Ground Level)

**Step 1: Layout Rim Joists**
1. Place both 8' rim joists parallel on sawhorses or blocks
2. Measure to ensure they are exactly 10' apart (outside to outside)
3. Mark joist locations on rim joists at 16" on-center

**Step 2: Install Floor Joists**
1. Position first floor joist flush with one end
2. Drive 3 screws (or nails) through rim joist into joist end
3. Repeat for all 0 floor joists at marked locations
4. Use framing square to ensure 90° at each connection

**Step 3: Square the Frame**
1. Measure diagonals (corner to corner)
2. Adjust until diagonals are equal (±1/8")
3. Frame is now square

> ✅ **QC Checkpoint**: Frame should be square, level, and all joists secured.

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### Phase 4: Install Top Sheathing (Subfloor)

**Step 8: Install OSB Sheathing**
1. Apply construction adhesive to joist tops
2. Start at one end, flush with frame edges
3. Drive 1-5/8" subfloor screws every 6" along edges, 8" in field
4. Stagger joints (offset from plywood layer below)
5. Leave 1/8" gap between sheets for expansion

> ✅ **QC Checkpoint**: Walk entire surface. No squeaks or soft spots.

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### Phase 5: Final QC & Completion

**Final Inspection Checklist:**
- [ ] All screws/nails driven flush
- [ ] No gaps in insulation
- [ ] Subfloor is flat and level
- [ ] Edges clean and square
- [ ] Module ready for transport or installation

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## 📐 Reference Diagrams

### Joist Layout (Top View)
```
┌──────────────────────────────────────────────────────────────────────┐
│  RIM JOIST (8')                                                    │
├────┬────┬────┬────┬────┬────────────────────────────────────────┬──────┤
│    │    │    │    │    │                                        │ ○    │
│    │    │    │    │    │                                        │water │
│    │    │    │    │    │                                        │inlet │
├────┴────┴────┴────┴────┴────────────────────────────────────────┴──────┤
│  RIM JOIST (8')                                                    │
└──────────────────────────────────────────────────────────────────────┘
     ↑    ↑    ↑    ↑    ↑
   Joists @ 16" OC
```

### Cross-Section
```
        ┌────────────────────────────────────┐
        │      OSB (3/4")                    │  ← Subfloor
        ├────┬─────────────────┬─────────────┤
        │2x8 │  INSULATION     │ 2x8        │  ← Joists + Batt
        │    │  R-30 BATT      │            │
        ├────┴─────────────────┴─────────────┤
        │      PT PLYWOOD (3/4")             │  ← Moisture Barrier
        └────────────────────────────────────┘
```

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## ⏱️ Time Estimates

| Phase | Time (2 people) |
|-------|-----------------|
| 1. Frame Assembly | 1 hour |
| 2. Bottom Sheathing | 1 hour |
| 3. Insulation | 30 min |
| 4. Top Sheathing | 1 hour |
| 5. QC & Cleanup | 30 min |
| **Total** | **4 hours** |

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## 💰 Estimated Cost

| Category | Cost |
|----------|------|
| Lumber | ~$120 |
| PT Plywood | ~$200 |
| OSB | ~$100 |
| Insulation | ~$60 |
| Hardware | ~$50 |
| **Total** | **~$530** |

*Prices vary by region and market conditions.*

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## 📝 Notes

- This module is part of a multi-module floor system
- Ensure proper vapor barrier on bottom (PT plywood serves this purpose)
- Module designed to connect to other OSE modules
- See OSE Wiki for full Seed Home documentation

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> **Generated by**: OSE Weaver Protocol v2.0 (Platinum Format)
> **Source File**: Walls_Templates_SH7 - Ext Wall - 10 ft
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