Modified Wood TDS Technical Datasheet: What to Look For and How to Read It

A guide to understanding technical datasheets for modified wood — key parameters, test standards, and what the numbers actually mean for your project

If you've ever received a TDS (Technical Data Sheet) for a building material and thought "what am I even looking at?" — you're not alone. Technical datasheets are packed with numbers, standards references, and jargon that can be hard to decode, especially when English isn't your first language.

For modified wood products, reading a TDS correctly is pretty important. The data in that sheet determines whether the material will work for your application, pass building inspections, and perform over time. Let's break it down.

What Is a TDS, and Why Does It Matter?

A TDS (sometimes called a Technical Datasheet or Product Specification Sheet) is the manufacturer's official document describing the physical, mechanical, and chemical properties of a product. For modified wood, it typically includes:

• Density and specific gravity
• Moisture content range and equilibrium moisture content (EMC)
• Mechanical properties (bending strength, modulus of elasticity, hardness)
• Dimensional stability data (swelling/shrinkage coefficients)
• Fire performance classification and test method
• Durability class against decay fungi and insects
• Formaldehyde emission class or VOC levels

At Chambroad, we provide a complete TDS for every product line we offer. Not a generic one-size-fits-all sheet, but specific data for each grade and profile type.

Key Parameters Explained

Let's go through the most important parameters you'll see on a modified wood TDS, one by one:

Density & Specific Gravity

Density is usually expressed in kg/m³. Modified wood typically falls in the 550–750 kg/m³ range depending on species base and modification level. Higher density generally means better hardness and surface wear resistance but also more weight per cubic meter — something to consider for structural load calculations and shipping cost estimation.

Moisture Content & EMC

The moisture content at time of shipment should typically be 8–12% for most applications. Equilibrium Moisture Content (EMC) tells you what the wood will stabilize at under standard atmospheric conditions (usually 20°C / 65% RH). A lower EMC means less dimensional movement over seasonal humidity changes — critical for facade cladding and precision-fit applications like window profiles.

Bending Strength (MOR) & Modulus of Elasticity (MOE)

These two values determine how much load the wood can carry before breaking (MOR) and how much it deflects under load (MOE). For modified wood used in decking or structural applications, look for MOR above 80–100 MPa and MOE above 10,000–12,000 MPa. Our sports wood profiles, for instance, are engineered with particularly high surface hardness and MOR for high-traffic applications like billiard tables and yoga flooring systems.

Fire Rating Classification

This is non-negotiable for commercial projects. You'll see classifications like:

Decay Resistance (Durability Class)

According to EN 350, durability classes run from 1 (very durable) to 5 (not durable). High-quality modified wood should achieve Class 1 or Class 2 against decay fungi. Our marine anti-corrosion flooring, for example, is tested for resistance to salt spray, rot, and marine borer attack — well beyond typical exterior durability requirements.

Formaldehyde Emission Class

Critical for interior and occupied-space applications. The main standards are:

• E1 / E0 (EN 717-1): ≤ 0.124 mg/m³ (E1) or ≤ 0.062 mg/m³ (E0) — Chambroad products meet both
• CARB Phase 2 (EPA TSCA Title VI): US market requirement — our products are compliant

Red Flags to Watch For in Any TDS

Not all TDS documents are created equal. Here are some warning signs:

1. No test standard cited: A number like "Bending Strength: 95 MPa" means nothing without referencing EN 310, ASTM D198, or equivalent. If there's no standard, ask for the lab report.
2. Test date older than 3 years: Manufacturing processes change. A test from 2019 may not represent current production output.
3. Generic sheet for multiple products: One TDS covering everything from thin panels to thick timber usually means approximate values, not tested ones.
4. No third-party lab name: In-house testing has its place, but independent laboratory verification carries far more weight for regulatory submissions.

How Chambroad Handles TDS Documentation

We take datasheet documentation seriously because we know our customers rely on it for engineering calculations, permit applications, and quality assurance. Here's our approach:

• Product-specific TDS — each product line (decking, wall panels, door/window profiles, etc.) has its own dedicated sheet
• Third-party test reports available — all key properties backed by accredited laboratory results
• Multi-language support — TDS available in English; Chinese versions available upon request
• Regular re-testing — core mechanical and fire properties re-verified periodically to reflect current production