ud83dudcda Wood Deck Build Log u2014 11 of 45
u2190 Roof Material Pt.1 u00b7 Series Index u00b7 Structural Design Pt.1: Steel Pipe Concept u2192
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2026 Note from DIY Dad: Choosing Deck Materials
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Pressure-Treated Deck Lumber
Pressure-treated lumber is the baseline u2014 skip it and you’ll be rebuilding in 5 years.
The most important decision in wood deck planning is material selection. Natural wood or composite? Which species? This choice determines cost, durability, and maintenance effort.
Natural Wood vs Composite (WPC)
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Deck Stains & Waterproof Sealers
Stain every 2u20133 years. It’s the single cheapest way to double deck lifespan.
- Natural wood — pros: real wood feel and warmth, lower cost. Cons: regular painting maintenance required, risk of rot and termites
- Composite (WPC) — pros: does not rot, minimal maintenance, consistent quality. Cons: more expensive, gets very hot in summer, artificial appearance
I chose natural hardwood — for the real wood feel and better cost.
Natural Wood Types
Softwood: SPF (white wood) — inexpensive, must be painted, rots easily (not suitable for decking). Western red cedar — light and workable, less durable than hardwood. Domestic hinoki/sugi — suitable outdoors with pressure treatment, affordable.
Hardwood: Ipe — highest durability, 30+ years without paint, expensive. Ulin (ironwood) — excellent water resistance, tough, hard to work. Bangkirai — best value for hardwood, good balance of durability and price.
I chose Bangkirai — best cost-performance among hardwoods.
Structural Member Material Selection
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Deck Screws & Fasteners
Use stainless screws only u2014 standard screws rust and stain the deck within one rainy season.
Structural members (floor joist, beam, post) need at least as much durability as the decking. I used aluminum tube for the frame — natural wood warmth for the decking, aluminum durability for the structure.
Roof Material Selection
Adding a roof provides: use in rainy weather, reduced decking wear, cooler summer conditions. Options: polycarbonate panel pergola (easy DIY) or prefab terrace roof (higher cost).
Originally published: 2017-04-19. Continuing the roof material comparison — corrugated roofing types:
Polycarbonate Corrugated Roofing
Relative price: 1.4 / Lifespan: 10 years. Does not transmit UV rays — note for plant growing. Has a designated top and bottom face. Recommended for garages, terraces, balconies, greenhouses, and clear walls.
↑ Polycarbonate corrugated roofing
Color-Coated Galvanized (Totan) Corrugated Roofing
Relative price: 1.4 / Lifespan: 15–20 years. Wide color range; a classic corrugated roofing option used for decades. The galvanized coating will eventually rust with age. Suitable for sheds, residential roofing, and exterior walls.
↑ Color-coated galvanized corrugated roofing
Galvalume Steel Corrugated Roofing
Relative price: 1.8 / Lifespan: 15–20 years. Superior corrosion resistance and heat resistance. Suitable for sheds, residential roofing, and exterior walls.
↑ Galvalume steel corrugated roofing
Each option has trade-offs. I chose polycarbonate corrugated roofing based on the balance of price, lifespan, and workability.
↑ Polycarbonate corrugated roofing (selected)
ud83dudcda Wood Deck Build Log u2014 11 of 45
u2190 Roof Material Pt.1 u00b7 Series Index u00b7 Structural Design Pt.1: Steel Pipe Concept u2192
DIY Renovation Quote Review Manual
How to read, compare, and negotiate contractor quotes. This manual saved me u00a5800,000 on a single renovation project.
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15 years of landlord experience u00b7 3 apartment buildings u00b7 DIY renovations that saved millions of yen. Browse all articles at diytosan.com
