Plywood or PVC? 💨Steam box materials for bending wood
- Flexmakr
- May 5
- 3 min read
Updated: May 11
When it comes to bending wood using steam, a steam box is one of the most important pieces of equipment you’ll need. Choosing the right material for your steam box is a critical decision to make in your steam bending journey.
Plywood and PVC pipe are the two most commonly used materials used for building a steam box for bending wood, each with their own advantages and disadvantages.
But now with the introduction of the Flexmakr Modular Steam Box, woodworkers have the option of using an innovative, modular steam box solution that offers better performance and durability, while being highly versatile, compact and portable as compared to conventional steam boxes.
In this article, we will compare the different steam box options across critical factors like: Ease of construction, performance, durability, portability and ease of storage.
🛠️ Ease of construction - Based on the time, skill and tools required to build
Plywood: 2/5
Requires measuring, cutting, screwing/gluing panels
Needs sealant or weather stripping for airtightness
Requires more tools, skill and several hours to build
Also Read: How to make your own plywood steam box
PVC: 4/5
Quick to assemble relative to plywood
Only needs cutting and attaching end caps or doors
PVC pipes are easily available in various diameters
Also Read: How to make your own PVC tube steam box
Flexmakr: 5/5
Assembly takes a few minutes and only with basic tools like a screwdriver
The first off-the-shelf steam box available on market
Easily join various modules to make a steam box of any length
Also Read: Key features of the Flexmakr modular steam box
📈 Performance - Based on the thermal efficiency
Plywood: 3/5
Offers better heat retention than PVC
Available in various thicknesses for better insulation
PVC: 2/5
Low heat retention compared to plywood
Limited options for pipe wall thickness
Flexmakr: 4/5
Can be quickly adjusted to the size of the workpiece for the best efficiency
Comes with additional thermal insulation jackets for better heat retention
💪 Durability - To withstand long term use without significant deterioration
Plywood: 4/5
Certain grades of plywood can withstand heat and moisture long term
Retains structural integrity under high temperature
Resistant to UV exposure for outdoor use
PVC: 1/5
Good moisture resistance but poor temperature resistance
Can sag or deform after extended use
Degrades under long term UV exposure
Flexmakr: 4/5
Designed to withstand high temperature and moisture for extended periods
Metal frames with durable, industrial grade materials
Adequate UV resistance
🧰 Ease of storage & Portability
Plywood: 2/5
Bulky, takes up valuable shop space
Difficult to carry due to size and weight
PVC: 3/5
Lighter than plywood but not easy to store
More portable than plywood due to lower weight
Flexmakr: 5/5
Can be compressed down to a fraction of its size for easy storage
Light, compact and convenient to carry
📋 Comparison Overview
Plywood | PVC | Flexmakr | |
Ease of construction | 2 | 4 | 5 |
Performance | 3 | 2 | 4 |
Durability | 4 | 1 | 4 |
Ease of Storage | 2 | 3 | 5 |
Total Score | 11 | 10 | 18 |
🌿 Conclusion
A plywood steam box provides excellent durability and optimal performance for most use cases but is bulky and time-consuming to make.
A PVC steam box is popular for its ease of construction and affordability (if using low grade PVC) but provides sub-optimal performance and poor durability.
The Flexmakr modular steam box emerges as the overall winner and excels in every parameter due to its quick and easy assembly, ability to adapt according to the workpiece length for the best efficiency, use of long-lasting industrial materials and collapsible design that is portable and saves valuable shop space.
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