Joint Sealing Services
At GP Contracts, we provide specialist joint sealing services designed to protect buildings from water ingress, structural movement, and long-term deterioration. Proper joint sealing is essential in both new construction and refurbishment projects, ensuring durability, flexibility, and weather resistance.
From expansion joints in large commercial buildings to movement joints in residential properties, professional joint sealing plays a vital role in maintaining structural integrity and extending the lifespan of construction materials.
What Is Joint Sealing?
Joint sealing involves applying high-performance sealants into gaps or joints within a structure to prevent the penetration of water, air, dust, and debris while allowing controlled movement.
Buildings naturally expand and contract due to temperature changes, moisture levels, and structural load. Without properly sealed joints, these movements can lead to cracking, leaks, and premature material failure.
Common types of joints requiring sealing include:
- Expansion joints
- Movement joints
- Construction joints
- Control joints
- Floor joints
- Wall-to-floor junctions
- Precast concrete joints
- Brickwork and façade joints
Professional joint sealing ensures these critical areas remain flexible, watertight, and structurally sound.
Why Joint Sealing Is Essential
Prevents Water Ingress
Unsealed or deteriorated joints are one of the primary entry points for water. Over time, water infiltration can cause:
- Concrete degradation
- Steel reinforcement corrosion
- Internal damp issues
- Damage to insulation
- Surface staining
- Structural weakening
Correctly installed joint sealants provide a durable barrier against moisture penetration.
Accommodates Structural Movement
Buildings are constantly subject to movement caused by:
- Temperature fluctuations
- Wind loads
- Settlement
- Traffic vibration
- Heavy usage
Specialist joint sealants are designed to stretch and compress without cracking, ensuring the joint remains sealed while allowing necessary flexibility.
Enhances Energy Efficiency
Air leakage through unsealed joints reduces insulation performance and increases heating or cooling costs. Effective joint sealing improves airtightness and overall building performance.
Extends Building Lifespan
By preventing water and debris intrusion, joint sealing protects structural components and external finishes, reducing maintenance costs and prolonging the life of the building envelope.
Expansion Joint Sealing
Expansion joints are designed to absorb structural movement in large buildings. These joints require flexible, high-performance sealants capable of handling significant movement without losing adhesion.
Commonly found in:
- Commercial buildings
- Industrial units
- Car parks
- Shopping centres
- Large residential developments
Movement Joint Sealing
Movement joints are incorporated into brickwork, concrete, and cladding systems to prevent cracking. Professional sealing ensures these joints function as intended while maintaining weather resistance.
Construction Joint Sealing
Construction joints occur where separate concrete pours or building elements meet. Proper sealing prevents water penetration and maintains structural integrity.
Floor Joint Sealing
Floor joints in warehouses, retail units, and industrial spaces are exposed to heavy footfall, machinery, and vehicle traffic. Specialist sealants are used to withstand abrasion and load while remaining flexible.
Façade and Cladding Joint Sealing
External façades require weather-resistant sealing solutions to protect against wind-driven rain and environmental exposure.
Signs Your Joints Require Resealing
Joint sealant deteriorates over time due to UV exposure, movement stress, and environmental conditions. You may require professional resealing if you notice:
- Cracked or split sealant
- Gaps forming between materials
- Sealant pulling away from joint edges
- Visible water ingress
- Damp patches near joints
- Surface staining or mould
Addressing these issues promptly prevents further structural damage.
Our Professional Joint Sealing Process
At GP Contracts, we follow a structured and precise process to ensure long-lasting results.
Site Assessment
We evaluate joint type, width, movement requirements, and environmental exposure to determine the most suitable sealing solution.
Removal of Existing Sealant
Old or failed sealant is carefully removed. Complete removal is critical for ensuring proper adhesion of the new material.
Joint Preparation
We clean and prepare joint surfaces thoroughly. Where required, backing rods are installed to control sealant depth and ensure optimal performance.
Application of Specialist Sealant
We apply high-performance polyurethane, silicone, or hybrid sealants depending on the project requirements. Sealant is tooled to achieve proper bonding and a neat finish.
Quality Inspection
All joints are inspected to ensure consistent coverage, flexibility, and durability.
Domestic Joint Sealing Services
In residential properties, joint sealing may be required for:
- Brickwork movement joints
- Garage floors
- Driveways
- Patio joints
- Internal wall-to-floor junctions
- Around structural extensions
Proper sealing protects homes from damp penetration and structural cracking.
Commercial & Industrial Joint Sealing
Commercial and industrial environments demand durable, high-performance joint sealing solutions. We provide services for:
- Office developments
- Retail centres
- Schools
- Hospitals
- Warehouses
- Car parks
- Apartment blocks
Our team works efficiently to meet project deadlines while maintaining high safety and quality standards.
The Risks of Poor Joint Sealing
Improper or neglected joint sealing can lead to:
- Structural cracking
- Water damage
- Mould growth
- Increased maintenance costs
- Reduced energy efficiency
- Compromised building performance
Professional installation ensures correct joint depth, material compatibility, and long-term reliability.
Choosing the Right Joint Sealant
Different joint types require specific sealant properties. Key considerations include:
- Movement capability
- Adhesion to substrate materials
- UV and weather resistance
- Chemical resistance (for industrial settings)
- Traffic load tolerance (for floors)
Selecting the appropriate product is essential for achieving durable, high-performance results.
How Long Does Joint Sealant Last?
High-quality joint sealants can last between 10 and 25 years depending on environmental exposure, building movement, and usage levels. Regular inspections are recommended to identify early signs of wear and prevent major repairs.
Joint Sealing as Part of Construction & Refurbishment
Joint sealing is a critical stage in both new-build and refurbishment projects. It integrates with:
- Concrete works
- Bricklaying
- Cladding installation
- Flooring systems
- External façade works
- Waterproofing systems
Attention to detail at this stage ensures the building envelope performs effectively over the long term.
Why Choose GP Contracts for Joint Sealing?
At GP Contracts, we combine industry knowledge with precision workmanship to deliver reliable joint sealing solutions. Clients choose us because we provide:
- Expert assessment and product selection
- Skilled and experienced operatives
- High-performance materials
- Clean and professional finishes
- Long-term durability
Whether you require minor resealing or large-scale expansion joint installation, we tailor our services to suit your project requirements.
Protect Your Building with Professional Joint Sealing
Joint sealing is a fundamental component of building protection. Properly sealed joints safeguard against water ingress, structural movement, and environmental damage while improving energy efficiency and overall performance.
If you are planning a construction project, managing a commercial property, or addressing signs of sealant failure, professional joint sealing ensures your building remains protected and structurally sound for years to come.
Contact GP Contracts today to discuss your joint sealing requirements and ensure your property benefits from durable, high-quality protection.
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