Mahogany Decking 5.5" x 12'
Genuine mahogany (Swietenia or Shorea genus) decking offers a warm reddish-brown hue with excellent workability compared to other tropical hardwoods. Less dense than ipe but still significantly harder and more durable than domestic softwoods like cedar or pine.
Pros and Cons
Advantages
- Beautiful reddish-brown color
- Naturally rot and insect resistant
- Easier to work with than ipe
- Good dimensional stability
- 25+ year lifespan with maintenance
Considerations
- Expensive tropical hardwood
- Requires periodic oiling
- Sourcing sustainability varies
- Can be slippery when wet
- Color variation between boards
Cost Estimates by Deck Size
The table below shows pre-computed material costs for five standard deck sizes using Mahogany Decking 5.5" x 12'. All estimates include structural framing (joists, beams, posts), concrete footings, fasteners, hardware, railing on three sides, and one set of stairs. The board cost column shows the cost of decking boards alone, while the total includes all materials needed for a complete deck.
| Deck Size | Area | Boards | Board Cost | Total Materials |
|---|---|---|---|---|
| 10' x 12' Deck | 120 sq ft | 24 | $1,872 | $4,773 |
| 12' x 16' Deck | 192 sq ft | 38 | $2,964 | $6,387 |
| 14' x 20' Deck | 280 sq ft | 55 | $4,290 | $9,401 |
| 16' x 24' Deck | 384 sq ft | 76 | $5,928 | $11,588 |
| 20' x 20' Deck | 400 sq ft | 79 | $6,162 | $12,529 |
Material Comparison for a 12' x 16' Deck
How does Mahogany Decking 5.5" x 12' compare to other decking materials? The following table shows total material costs for a standard 12' x 16' deck (192 sq ft) across multiple decking options. This comparison includes identical framing and hardware for each option; only the surface decking boards differ.
| Decking Material | Price/LF | Board Cost | Total Materials |
|---|---|---|---|
| Mahogany Decking 5.5" x 12' | $7/lf | $2,964 | $6,387 |
| Pressure-Treated Pine 5.5" x 12' | $2/lf | $912 | $4,335 |
| Composite Decking 5.5" x 12' | $5/lf | $2,052 | $5,475 |
| Western Red Cedar 5.5" x 12' | $5/lf | $2,052 | $5,475 |
| Redwood Decking 5.5" x 12' | $8/lf | $3,648 | $7,071 |
| Ipe Hardwood 5.5" x 12' | $9/lf | $4,104 | $7,527 |
| PVC Decking 5.5" x 12' | $6/lf | $2,736 | $6,159 |
Maintenance and Lifespan
Expected lifespan: 25-40 years with proper maintenance. The actual service life depends on your climate zone, sun exposure, proximity to water, and how diligently maintenance is performed. Decks in the Pacific Northwest that receive heavy rainfall will weather differently than decks in the arid Southwest, and maintenance schedules should be adjusted accordingly.
Maintenance requirements: Annual oiling with a penetrating exterior wood oil. Mahogany is easier to maintain than ipe due to its lower density, which allows oil to penetrate more readily. Periodic cleaning with a mild detergent removes surface dirt and prepares the wood for re-oiling.
Estimated annual maintenance cost: $100-200 per year (oil and cleaning supplies). Over a 20-year period, these annual costs accumulate and should be factored into your total cost of ownership calculation. A material with a higher purchase price but lower maintenance may actually cost less over the deck's full lifespan.
Proper installation is the single most important factor in deck longevity regardless of material choice. Ensure adequate ventilation beneath the deck surface (minimum 18 inches of clearance for ground-level decks), proper drainage away from the structure, and correct fastener selection for the specific decking material. Using the wrong fastener type or spacing can void manufacturer warranties and lead to premature board failure.
Installation Tips for Mahogany
Mahogany decking benefits from pre-drilling near board ends to prevent splitting, particularly within 2 inches of any edge. Use stainless steel or coated deck screws compatible with the specific wood species. Allow boards to acclimatize to your local humidity for at least one week before installation by stacking them flat with spacers in a covered area. Apply a UV-protective penetrating sealer or oil within 30 days of installation to preserve the natural color. Leave appropriate drainage gaps between boards (typically 1/8 inch) and expansion gaps at fixed structures (1/4 inch).
Frequently Asked Questions
How much does Mahogany Decking 5.5" x 12' cost for a 12x16 deck?
Using Mahogany Decking 5.5" x 12' for a 12' x 16' deck (192 sq ft), the total material cost including framing, hardware, railing, and stairs is approximately $6,387. The decking boards alone account for $2,964 of that total. Adding professional installation at $25/sq ft would bring the complete project cost to approximately $11,187.
How long does mahogany decking last?
Mahogany decking typically lasts 25-40 years with proper maintenance. Annual oiling with a penetrating exterior wood oil. Mahogany is easier to maintain than ipe due to its lower density, which allows oil to penetrate more readily. Annual maintenance costs are estimated at $100-200 per year (oil and cleaning supplies). The actual lifespan depends on your climate, the quality of installation, and how consistently maintenance is performed.
Is mahogany a good choice for decking?
Mahogany is a premium hardwood option offering exceptional durability and beauty. Key advantages include beautiful reddish-brown color, naturally rot and insect resistant, easier to work with than ipe. The main considerations are expensive tropical hardwood and requires periodic oiling. Your decision should factor in both upfront cost and long-term maintenance requirements.