OSB Board Class 3

​All prices are subject to VAT

OSB Board Class 3 – 8' x 4' Sheets

Our OSB Board Class 3 is a versatile, strong, and cost-effective building material suitable for a wide range of construction and DIY projects. Manufactured from layers of compressed wood strands and adhesives, this engineered wood panel is specially designed to provide a durable and robust board for structural and non-structural applications.

Intended Use:

• Suitable for projects including flooring, wall sheathing, and roofing.

• Ideal for both DIY enthusiasts and professional builders seeking a reliable, affordable sheet material.

• Class 3 boards are moisture-resistant but not waterproof. They are more water-resistant than standard plywood but may not be suitable for applications where the board is permanently exposed to water.

Cutting Charges:

• £0.60 per cut.

• For multiple cuts of the same size, please ask for a price on application.

• For large or complex cutting requirements, contact our office.

Frequently Asked Questions

1. What’s an OSB board?
An OSB (Oriented Strand Board) is engineered wood made from layers of compressed wood strands bonded with adhesives, designed to be durable, strong, and robust.

2. Are OSB boards waterproof?
No – OSB boards are not waterproof. They are water-resistant, meaning they handle moisture better than standard plywood, but they may not be suitable for permanent water exposure.

3. Can OSB Class 3 be used outdoors?
Class 3 boards are moisture-RESISTANT and can be used in exterior applications such as roofing and wall sheathing, provided the edges are sealed and the board isn’t continuously exposed to water.

4. What sizes and thicknesses are available?
We stock 8' x 4' sheets in 11mm and 18mm thicknesses, with bulk discounts available for 20 sheets or more.

5. Can OSB be cut to size?
Yes - we offer a cutting service on most our Sheet Materials at £0.60 per cut. For multiple or complex cuts, please contact the office for a quote.

6. What projects is OSB Class 3 suitable for?

• Structural flooring and subfloors

• Roof decking and sheathing

• Wall panels

• DIY furniture or interior partitions

Why Choose J Gard & Sons OSB Board Class 3?

• Durable & Reliable: High-quality engineered wood for long-lasting performance.

• Moisture Resistant: Handles moisture better than plywood, suitable for indoor and some exterior applications.

• Versatile Use: Ideal for flooring, walls, roofing, and general construction.

• Custom Cutting Available: Quick, precise cuts to fit your project requirements.

• Competitive Pricing & Regular Stock: Ensures your project stays on budget and on schedule.

• Convenient Collection or Delivery: Available from our Chelmsford yard or delivered across Essex.