CLT vs Glulam
Natural Material · grade comparison
CLT and Glulam are both natural material grades. Glulam is the stronger of the two: tensile strength 19 MPa (2.78 ksi) against 16 MPa (2.32 ksi) for CLT, about 20% more. In exchange, CLT is the more ductile: elongation 0.9% versus 0.8% for Glulam. CLT runs hotter in service (55°C vs 50°C continuous).
CLTChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
GlulamChoose it when strength drives the design.
CLT vs Glulam: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all natural material grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all natural material grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Elongation at Break
Compressive Strength
Hardness, Mohs
Same in both: Flexural Strength 24 MPa3.5 ksi · Shear Strength 4 MPa0.51 ksi · Fracture Toughness (K_IC) 0.4 MPa·√m0.36 ksi·√in
Physical
Density and transition temperatures.
Porosity
Same in both: Density 0.47 g/cm³0.02 lb/in³
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 1,600 J/kg·K0.38 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 4.5 µm/m·K2.5 µin/in·°F · Min Service Temperature -50°C-58 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Dielectric Strength
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Polishability
Same in both: Machinability 92 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Same in both: Typical Recycled Content 2%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Same in both: Thermal Diffusivity 0.2 mm²/s · Thermal Shock Resistance Index 0
Strength versus weight
Yield strength against density for every natural material grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | CLT | Glulam |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$ Standard | $$ Standard |
| Min. machined wall | — | — |
| Best machined surface | — | — |
CLT vs Glulam — frequently asked
Is Glulam stronger than CLT?
Yes. Glulam has a typical tensile strength of 19 MPa (2.78 ksi) against 16 MPa (2.32 ksi) for CLT — about 20% more.
Which is cheaper, CLT or Glulam?
Both sit in the same relative cost tier ($$, standard); the part price will be decided by machining time, tolerance and quantity rather than by the material.
When should I choose CLT over Glulam?
Pick CLT when the part is bent, formed or impact-loaded, or when the part sees heat. Pick Glulam when strength drives the design.
Ready to make it?
Upload a CAD file and FabDigit prices the part in CLT and Glulam side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.