EN 13963 Joint Materials for Plasterboards - Definitions, Requirements and Test Methods

The European standard "EN 13963 Joint materials for plasterboards - Definitions, requirements and test methods" describes the requirements for jointing compounds and paper tapes used to fill and finish joints created at the edges and ends of plasterboards in accordance with EN 520, secondary processing products in accordance with EN 14190, prefabricated plasterboard panels with a cellular cardboard core in accordance with EN 13915, thermal/acoustic composite panels in accordance with EN 13950, preformed plasterboard cornices in accordance with EN 14209 and fibre-reinforced plasterboards in accordance with EN 15283-1 and EN 15283-2.

This standard does not cover tapes made from materials other than paper. This standard covers properties such as fire resistance and flexural strength, which are to be measured according to relevant test methods.

At least three samples are subjected to the tests specified in this standard. When performing the test, the joint compound should be mixed with tap water at the ratio recommended by the manufacturer. Setting time should be determined using a Vicat apparatus fitted with a penetration cone in an environment maintained at 23°C (plus/minus 2°C) and 50% (plus/minus 5%) relative humidity.

The test methods described in this standard are:

• Determination of crack resistance
• Particle size distribution determination
• Determination of adhesion / cohesion
• Determination of dimensional stability of paper splicing tape
• Determination of tensile strength of paper splicing tape
• Determination of flexural strength (breaking load)
• Determination of water absorption amount

In the modern construction world, where plasterboard and gypsum-based systems dominate interior partitions and ceilings, the integrity of the joints between boards is paramount. Weak or poorly finished joints can lead to cracks, reduced fire resistance, or structural failure over time. This is where EN 13963 comes into play. This standard establishes uniform criteria for joint fillers and paper tapes used in plasterboard applications, ensuring durability, safety, and performance in a variety of applications. This standard applies to a wide range of plasterboard products, from standard plasterboards to advanced composites. This standard complies with the EU Construction Products Directive (CPR), which mandates CE marking for compliant products.

EN 13963 focuses on materials that seal and finish joints at the edges and ends of plasterboards, preventing air infiltration, improving aesthetics, and maintaining structural integrity. It covers joint compounds (air-drying or hardening types) and paper tapes, but not non-paper tapes or materials for non-plaster surfaces.

The main objectives of this standard are:

• Performance assurance: Verifying that joint systems withstand mechanical stresses, fire exposure and environmental factors without cracking or deterioration.
• Harmonisation: To ensure smooth trade within the EU and reduce variability in national practices by standardising definitions, requirements and tests.
• Safety and sustainability: Supporting environmentally friendly construction by addressing fire response, hazardous material emissions and material efficiency.

Applicable to products such as plasterboard (EN 520), thermal/acoustic panels (EN 13950) and fibre-reinforced boards (EN 15283), this standard ensures compatibility in residential, commercial and industrial buildings.

For the purposes of the EN 13963 standard, the following definitions apply:

• Joint sealant: A paste-like material for filling joints and is classified as bedding (taping), finishing (surfacing), or dual-purpose.
• Joint tape: Perforated paper strips for reinforcement.
• Solidifying paste: Hardens by chemical reaction (e.g. gypsum based), air drying is based on evaporation.
• Hydrophobized compound: These are water-repellent variants for humid environments. The compounds are divided into eight types based on their curing and application method.

The EN 13963 standard includes rigorous, reproducible test methods performed in accredited laboratories under controlled conditions (e.g., 23°C plus/minus 2°C). Sampling requires a minimum of three units per batch.

The EN 13963 standard provides the foundation for reliable drywall systems, reduces recalls by up to 30 percent with crack-resistant joints, and improves fire safety in high-rise and public buildings. It supports green building certifications by minimizing emissions and waste. Standardized materials simplify workflows for installers and ensure long-term aesthetic and energy efficiency for end users.

However, evolving needs in healthcare, such as antimicrobial additives, may drive future updates. As the use of gypsum in seismic retrofits and modular construction increases, the role of this standard in durability cannot be overlooked.

As a result, the EN 13963 standard is a cornerstone for the plaster industry, transforming grouts from an afterthought into a science-backed guarantee. By identifying, testing, and certifying these essential materials, it creates safer, more durable interiors across Europe and beyond.

Our organization, with its competent and experienced staff, understands the needs of its clients, provides the advanced testing services they require, and assists in the establishment, implementation, and improvement of management systems. Within this framework, we also provide testing services in accordance with the " EN 13963 Joint materials for drywall - Definitions, requirements and test methods" standard.