Enhancement of materials - Wood enhancement — AQA A-Level Design and Technology: Product Design
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Enhancement of materials - Wood enhancement explained
Timber can be enhanced in two broad ways.
Read the full explanation
First, natural timber is combined with resins and laminated to give enhanced properties such as increased strength and stability; glulam and cross-laminated timber are examples where layers and adhesive improve structural performance and reduce movement. Second, timber products are enhanced with preservatives, finishes and coatings. Preservatives such as tanalith treatment protect against rot and insects; finishes and coatings such as varnish, paint or oil protect the surface from moisture and wear and improve appearance. For each method, name it, state the property it improves and give a product context. Distinguish structural enhancement (resin and lamination) from surface protection (preservatives, finishes, coatings).
Your focus
- Identify how combining timber with resins and lamination enhances properties such as strength and stability.
- Distinguish preservatives from finishes and coatings in enhancing timber products.
- Select the enhancement method that matches a stated timber property requirement.
Enhancement of materials - Wood enhancement exam tips
Marking Points
- Combining natural timber with resins and laminating layers gives increased strength and stability.
- Lamination with adhesive reduces movement and allows larger, more stable sections to be formed.
- Preservatives protect timber against rot, fungal decay and insect attack.
- Finishes and coatings such as varnish, paint or oil protect the surface from moisture and wear and improve appearance.
- Structural enhancement through resin and lamination is distinct from surface protection by preservatives, finishes and coatings.
- Each enhancement should be linked to the property it improves and a suitable product context.
Examiner Tips
- 💡Separate the two clauses: resin and lamination for structural enhancement, preservatives and coatings for protection.
- 💡For each option, ask whether it changes internal structure or protects the surface, then match to the question.
- 💡Link the enhancement to a named property such as strength, stability, rot resistance or moisture resistance.
- 💡Reject options that describe a property the stated method does not deliver.
Common Mistakes
- Confusing lamination with preservative treatment: correction is that lamination bonds layers with resin for strength and stability, while preservatives protect against decay and insects.
- Assuming a finish strengthens the timber structurally: correction is that finishes and coatings mainly protect the surface and improve appearance.
- Thinking lamination only changes appearance: correction is that combining timber with resin and laminating enhances strength and stability.
- Ignoring the product context: correction is to state which property is improved and where that enhancement is useful.