Protect your construction projects from structural damage with our range of expansion jointing. We stock high-performance Eco Fibreboard Expansion Joint Filler Strips, designed specifically to act as a compressible filler in concrete construction. Whether you are laying a new concrete slab, working on a driveway, or managing large-scale brickwork, these strips absorb natural movement to prevent cracking and heave. Available in a variety of sizes (including 100mm, 150mm, and 200mm widths), they are the ideal expansion joint material for concrete and masonry tasks.
All building materials - especially concrete, brick, and cement - expand and contract with changes in temperature and moisture. Without a dedicated gap to accommodate this movement, the built-up pressure can cause unsightly cracks, structural heave, or even failure of the masonry.
Expansion jointing acts as a buffer zone. It is a compressible strip placed within the joint that absorbs the expansion forces. While some projects use expansion joint foam, our Eco Fibreboard range offers a robust, sustainable solution that maintains its shape while allowing for necessary compression.
FAQs
What are the benefits of expansion jointing?
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Prevent Damage: Stops cracking and heave in concrete slabs and pathways.
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Eco-Friendly: Made from sustainable fibreboard materials.
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Versatile: Suitable for use as a concrete expansion joint filler or in brickwork.
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Easy Application: Can be easily cut to size and sealed with an appropriate expansion joint sealant.
What is the best material for concrete expansion joints?
For heavy-duty concrete slabs and structural work, a rigid yet compressible material like fibreboard is often preferred. It stands up well during the pouring process and provides a stable backing for sealants. While rubber expansion joints or foam rolls are common for lighter movement, fibreboard is the industry standard for general construction and flatwork.
Do I need to seal over the expansion joint?
Yes. Once the fibreboard strip is installed, it is usually set slightly below the surface level. The remaining gap should be topped with a high-quality concrete expansion joint sealant (often a mastic or flexible polyurethane). This prevents water from entering the joint, protecting the filler from rot and the concrete from freeze-thaw damage.
Where should expansion joints be placed?
Expansion joints are critical in large areas of concrete, such as driveways, patios, and warehouse floors, as well as in long stretches of brick walls. They should be placed wherever a slab meets a fixed structure (like a wall or column) and at regular intervals within large pours to isolate movement.
