--- title: How to Make the Most of GRP Trench Drain Grate Covers description: Enhance safety, reduce maintenance, and improve performance with GRP trench grate covers. image: https://blog.fibergrate.com/hubfs/Imported_Blog_Media/utility%20Trench%20Covers.jpg --- [![Fibergrate](https://blog.fibergrate.com/hubfs/fibergrate-theme-2024/images/blog/fibergrate-homepage-logo-30x20.svg)](https://fibergrate.uk/) - E-mail: [uk.info@fibergrate.com](mailto:uk.info@fibergrate.com) - Phone Number: +44 (0) 191 4021920 - [![blogicon](https://blog.fibergrate.com/hs-fs/hubfs/fibergrate-theme-2024/images/blog/blogicon.png?width=20&height=18&name=blogicon.png) VISIT OUR BLOG](https://blog.fibergrate.com/en-gb/blog) - [![phoneicon](https://blog.fibergrate.com/hs-fs/hubfs/fibergrate-theme-2024/images/blog/phoneicon.png?width=14&height=18&name=phoneicon.png) CONTACT US](https://fibergrate.uk/contact-us/) - [Products](https://fibergrate.uk/products/) - [Molded Gratings](https://fibergrate.uk/products/moulded-gratings/) - 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[FAQ](https://fibergrate.uk/resource-centre/faq/) - [Glossary](https://fibergrate.uk/resource-centre/glossary/) - [Design Resources](https://fibergrate.uk/resource-centre/design-resources/) - [Stamp of Authenticity](https://fibergrate.uk/stamp-of-authenticity/) - [About Us](https://fibergrate.uk/about-us/) ![](https://blog.fibergrate.com/hubfs/fibergrate-theme-2024/images/blog/searchgrey.png) [Fibergrate Marketing UK](https://blog.fibergrate.com/en-gb/blog/author/swati-rathore) on May 8, 2025 # How to Make the Most of GRP Trench Drain Grate Covers Trench drain grate covers are used in a wide range of industries to help manage water drainage, protect underground utilities, and ensure pedestrian and vehicle safety. However, traditional materials like steel and cast iron, often used for trench drain covers, can pose significant challenges.  ## GRP vs. Steel Trench Drain Grate Covers One of the most significant drawbacks of traditional metal trench drain covers is their susceptibility to corrosion. When exposed to moisture, salts, or other corrosive elements, steel and cast iron can deteriorate rapidly. This corrosion weakens the structural integrity of the covers, leading to potential safety hazards like collapsing grates or uneven surfaces. Additionally, repairs or replacements due to corrosion create unnecessary project delays and increased costs. The sheer weight of traditional metal trench drain grate covers, among other factors, can raise costs considerably in the best of times. However, *since the Suez canal crisis in 2021,* [*steel transportation costs are 150% higher than they were before*](https://eurometal.net/steel-transport-costs-still-150-higher-due-to-suez-crisis-italian-steel-body/), according to Eurometal. Additionally, labour costs associated with moving and handling heavy covers can be substantial, and projects can be delayed due to the physical demands of installation. Furthermore, the weight of these covers can restrict their use in certain applications, such as areas with limited weight capacities.  In contrast, [GRP trench grate covers](https://www.fibergrate.uk/products/pultruded-grating/safe-t-span%C2%AE-pultruded-gratings/) offer a significant advantage due to their lightweight design. Composed of fibreglass fibres embedded in a durable resin matrix, GRP boasts remarkable strength while being significantly lighter than steel or cast iron. This translates to numerous benefits: - **Reduced Labour Costs:** The lighter weight of GRP trench grate covers simplifies transportation, installation, and on-site cutting. Crews can handle and install GRP covers efficiently, reducing labour costs and project timelines. - **Improved Efficiency:** Faster installation minimises project downtime, saving time and resources during construction or maintenance projects. - **Versatility:** The lighter weight of GRP makes these trench grate covers suitable for a wider range of applications. This includes areas with weight restrictions or limited access, where traditional metal covers may not be feasible. There is also the issue of cost. While traditional metal trench grate covers may come with a lower initial cost for some use cases, they require regular maintenance to maintain their integrity and appearance. GRP trench grate covers are virtually maintenance-free in the long term. Their corrosive resistant properties minimise cleaning needs, and their durable construction eliminates the need for frequent repainting. This translates to significant cost savings over the lifespan of the trench drain system. ## More Ways to Extend the Lifespan of a Trench with GRP GRP can be used for trench gratings, covers, and embeds. The right combination of products matters. For example, with a standard GRP grating, replacing a steel embed with a one made of GRP is a good way to extend the lifespan of the trench. If the embed is made of steel, this can cause issues over time. Once it corrodes, the concrete in the trench will often crack. Then, it’s a big mess and costly to repair. So using GRP embed, which is what the grating rests on, prevents corrosion and prevents cracking of the concrete, which lengthens the life of the trench itself. If the trench grating cover itself is going to receive heavy vehicle traffic, then choosing a [high load pultruded grating](https://fibergrate.uk/products/pultruded-grating/high-load-pultruded-grating/) is often a better option than traditional moulded grating. This high-load grating that is corrosive resistant and it can withstand the load of an 18-wheeler.  ## Factors Influencing the Choice Between Open and Covered Grating ![TJ Looper](https://blog.fibergrate.com/hs-fs/hubfs/.Blog%20Images/TJ%20Looper.png?width=270&height=446&name=TJ%20Looper.png)There are two main factors that affect the decision for having a grating with a cover vs leaving it open. One reason is to improve the load bearing capacity of the grating if it will be exposed to heavy vehicle traffic. The other reason is to protect materials that may be laid in the trench. Sometimes, cabling, electrical wiring, or pipes are run through the trench. While access will be needed occasionally for maintenance, it is often best to ensure that rainwater, debris, and other materials don't run through the grating to contaminate, disrupt, or damage the trench contents. Fortunately, GRP trench covers are lightweight and can typically be manually removed (without the use of heavy equipment) for maintenance. Also, if the goal is to reduce the amount of debris getting into a trench, another option is to use grating with bars that are closer together. With galvanised steel, using that much metal rapidly increases both the weight and the cost of the grating. GRP turns out to be significantly cheaper, especially in the long run.   ##### Also read: [The Benefits of GRP Trench Drain Covers](https://blog.fibergrate.com/en-gb/blog/the-benefits-of-grp-trench-drain-covers?hsLang=en-gb) ## Fibergrate Success Stories ### GRP Trench Drain Covers at a Car Wash Tunnel [This car wash tunnel in Boston further exemplifies the advantages of GRP](https://fibergrate.uk/case-studies/architectural-commercial-case-studies/carwash-tunnel-with-fiberplate-and-moulded-grating/) in harsh environments. The traditional metal trench drain covers they were using were prone to corrosion due to constant exposure to water, chemicals, and harsh weather conditions. This led to frequent repairs and replacements, increasing maintenance costs. By replacing the metal covers with GRP trench drain covers, the facility was able to significantly reduce maintenance expenses. The GRP covers' corrosion resistance ensured long-term durability, while their slip-resistant surface improved safety for workers and customers. Additionally, the lightweight nature of GRP made installation and maintenance easier and more efficient.   This real-world example demonstrates the significant cost savings and improved safety that can be achieved by choosing GRP trench drain covers over traditional metal options. ### GRP Trench Covers at a Water Treatment Plant The client was facing challenges with the weight and maintenance requirements of traditional cast iron covers at a water treatment plant. These heavy, cumbersome covers required specialised equipment and labour for installation and maintenance, significantly increasing costs and posing safety risks to workers. Additionally, the cast iron covers were susceptible to corrosion, leading to premature failure and the need for frequent replacements. [Fibergrate provided a customised GRP solution for utility trench covers.](https://fibergrate.uk/case-studies/water-wastewater-case-studies/utility-trench-covers-for-wastewater-treatment-plant/) By switching to GRP, they were able to reduce installation costs, improve worker safety, and enhance the overall efficiency of their operations. The GRP covers' lightweight design allowed for easier handling and installation, while their corrosion resistance ensured long-term durability. Additionally, the slip-resistant surface of the GRP covers provided a safer working environment.   ## Ready to Learn More about Covering Your Trench Drain Grates with GRP? Fibergrate is a leading manufacturer of GRP trench grate covers, offering a wide range of products to meet your specific needs. Our in-house engineering team can provide expert guidance and support to ensure the optimal selection and installation of GRP trench grate covers. ![Trench Drain Grate Covers Exeltech](https://blog.fibergrate.com/hs-fs/hubfs/Imported_Blog_Media/Trench%20Cover%20Exeltech-Architectural%20and%20Commercial-High%20Load%20Pultruded%20Grating%20(4).jpg?width=2000&height=1500&name=Trench%20Cover%20Exeltech-Architectural%20and%20Commercial-High%20Load%20Pultruded%20Grating%20(4).jpg) Fibergrate's GRP trench grate used in hangar   [Contact Fibergrate today](https://fibergrate.uk/contact-us/) to learn more about how our products can benefit your project. [![Fully Fabricated FRP](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/344648/44b3b2f2-3599-4080-bf11-15960512badc.png)](https://hubspot-cta-redirect-na2-prod.s3.amazonaws.com/cta/redirect/344648/44b3b2f2-3599-4080-bf11-15960512badc)   Topics: [Safety](https://blog.fibergrate.com/en-gb/blog/tag/safety), [Glass Reinforced Plastic](https://blog.fibergrate.com/en-gb/blog/tag/glass-reinforced-plastic), [GRP, Moulded Grating](https://blog.fibergrate.com/en-gb/blog/tag/grp-moulded-grating), [Moulded Grating](https://blog.fibergrate.com/en-gb/blog/tag/moulded-grating), [Fibreglass grating](https://blog.fibergrate.com/en-gb/blog/tag/fibreglass-grating), [Trench Covers](https://blog.fibergrate.com/en-gb/blog/tag/trench-covers) ### Recent Posts ### Posts by tag - [GRP (120)](https://blog.fibergrate.com/en-gb/blog/tag/grp) - [Glass Reinforced Plastic (70)](https://blog.fibergrate.com/en-gb/blog/tag/glass-reinforced-plastic) - [Fibreglass grating (46)](https://blog.fibergrate.com/en-gb/blog/tag/fibreglass-grating) - [Corrosion Resistant (44)](https://blog.fibergrate.com/en-gb/blog/tag/corrosion-resistant) - [Safety (35)](https://blog.fibergrate.com/en-gb/blog/tag/safety) - [Moulded Grating (28)](https://blog.fibergrate.com/en-gb/blog/tag/moulded-grating) - [Benefits (21)](https://blog.fibergrate.com/en-gb/blog/tag/benefits) - [Slip Resistant (21)](https://blog.fibergrate.com/en-gb/blog/tag/slip-resistant) - [Pultruded Grating (20)](https://blog.fibergrate.com/en-gb/blog/tag/pultruded-grating) - [Low Maintenance (14)](https://blog.fibergrate.com/en-gb/blog/tag/low-maintenance) - [Construction (13)](https://blog.fibergrate.com/en-gb/blog/tag/construction) - [Architecture (12)](https://blog.fibergrate.com/en-gb/blog/tag/architecture) - [Employee Safety (9)](https://blog.fibergrate.com/en-gb/blog/tag/employee-safety) - [GRP, Moulded Grating (9)](https://blog.fibergrate.com/en-gb/blog/tag/grp-moulded-grating) - [Light Weight (9)](https://blog.fibergrate.com/en-gb/blog/tag/light-weight) - [architectural (9)](https://blog.fibergrate.com/en-gb/blog/tag/architectural) - [GRP UV Resistance (8)](https://blog.fibergrate.com/en-gb/blog/tag/grp-uv-resistance) - [Guardrail (8)](https://blog.fibergrate.com/en-gb/blog/tag/guardrail) - [Impact Resistant (7)](https://blog.fibergrate.com/en-gb/blog/tag/impact-resistant) - [Non-Conductive (7)](https://blog.fibergrate.com/en-gb/blog/tag/non-conductive) - [Railing (7)](https://blog.fibergrate.com/en-gb/blog/tag/railing) - [Data Centres (6)](https://blog.fibergrate.com/en-gb/blog/tag/data-centres) - [Long Service Life (6)](https://blog.fibergrate.com/en-gb/blog/tag/long-service-life) - [Metals & Mining (6)](https://blog.fibergrate.com/en-gb/blog/tag/metals-mining) - [Decking (5)](https://blog.fibergrate.com/en-gb/blog/tag/decking) - [Antimicrobial (4)](https://blog.fibergrate.com/en-gb/blog/tag/antimicrobial) - [Data Centre (4)](https://blog.fibergrate.com/en-gb/blog/tag/data-centre) - [Electrical Equipment Fencing (4)](https://blog.fibergrate.com/en-gb/blog/tag/electrical-equipment-fencing) - [Hazard Prevention (4)](https://blog.fibergrate.com/en-gb/blog/tag/hazard-prevention) - [Non-Magnetic (4)](https://blog.fibergrate.com/en-gb/blog/tag/non-magnetic) - [Stair Treads (4)](https://blog.fibergrate.com/en-gb/blog/tag/stair-treads) - [outdoor (4)](https://blog.fibergrate.com/en-gb/blog/tag/outdoor) - [Custom Railing (3)](https://blog.fibergrate.com/en-gb/blog/tag/custom-railing) - [Dynarail (3)](https://blog.fibergrate.com/en-gb/blog/tag/dynarail) - [Electrically Non-Conductive Fencing (3)](https://blog.fibergrate.com/en-gb/blog/tag/electrically-non-conductive-fencing) - [Fencing (3)](https://blog.fibergrate.com/en-gb/blog/tag/fencing) - [Food and Beverage (3)](https://blog.fibergrate.com/en-gb/blog/tag/food-and-beverage) - [Low Installation Cost (3)](https://blog.fibergrate.com/en-gb/blog/tag/low-installation-cost) - [Pedestals (3)](https://blog.fibergrate.com/en-gb/blog/tag/pedestals) - [Protective Barriers (3)](https://blog.fibergrate.com/en-gb/blog/tag/protective-barriers) - [Raised Flooring System (3)](https://blog.fibergrate.com/en-gb/blog/tag/raised-flooring-system) - [Rapid Installation (3)](https://blog.fibergrate.com/en-gb/blog/tag/rapid-installation) - [Rooftop Deck (3)](https://blog.fibergrate.com/en-gb/blog/tag/rooftop-deck) - [Stairs (3)](https://blog.fibergrate.com/en-gb/blog/tag/stairs) - [UV Resistant (3)](https://blog.fibergrate.com/en-gb/blog/tag/uv-resistant) - [Wastewater (3)](https://blog.fibergrate.com/en-gb/blog/tag/wastewater) - [Water (3)](https://blog.fibergrate.com/en-gb/blog/tag/water) - [Air Duct Screens (2)](https://blog.fibergrate.com/en-gb/blog/tag/air-duct-screens) - [Cost Effective (2)](https://blog.fibergrate.com/en-gb/blog/tag/cost-effective) - [Docks (2)](https://blog.fibergrate.com/en-gb/blog/tag/docks) - [ENC (2)](https://blog.fibergrate.com/en-gb/blog/tag/enc) - [FGI-AM (2)](https://blog.fibergrate.com/en-gb/blog/tag/fgi-am) - [Fiberglass Reinforced Plastic (2)](https://blog.fibergrate.com/en-gb/blog/tag/fiberglass-reinforced-plastic) - [Hazard Control (2)](https://blog.fibergrate.com/en-gb/blog/tag/hazard-control) - [MRI (2)](https://blog.fibergrate.com/en-gb/blog/tag/mri) - [Metals and Mining (2)](https://blog.fibergrate.com/en-gb/blog/tag/metals-and-mining) - [Stair Tread Covers (2)](https://blog.fibergrate.com/en-gb/blog/tag/stair-tread-covers) - [Steel (2)](https://blog.fibergrate.com/en-gb/blog/tag/steel) - [Structural Shapes (2)](https://blog.fibergrate.com/en-gb/blog/tag/structural-shapes) - [Trench Covers (2)](https://blog.fibergrate.com/en-gb/blog/tag/trench-covers) - [WWTP (2)](https://blog.fibergrate.com/en-gb/blog/tag/wwtp) - [Winery (2)](https://blog.fibergrate.com/en-gb/blog/tag/winery) - [Aqua Grate (1)](https://blog.fibergrate.com/en-gb/blog/tag/aqua-grate) - [Corrosion (1)](https://blog.fibergrate.com/en-gb/blog/tag/corrosion) - [Engineering Services (1)](https://blog.fibergrate.com/en-gb/blog/tag/engineering-services) - [Equipment Guard (1)](https://blog.fibergrate.com/en-gb/blog/tag/equipment-guard) - [Ergonomics (1)](https://blog.fibergrate.com/en-gb/blog/tag/ergonomics) - [FRP (1)](https://blog.fibergrate.com/en-gb/blog/tag/frp) - [FRP Decking (1)](https://blog.fibergrate.com/en-gb/blog/tag/frp-decking) - [FRP Fence (1)](https://blog.fibergrate.com/en-gb/blog/tag/frp-fence) - [Fibreglass Flooring (1)](https://blog.fibergrate.com/en-gb/blog/tag/fibreglass-flooring) - [Full Service (1)](https://blog.fibergrate.com/en-gb/blog/tag/full-service) - [Gas (1)](https://blog.fibergrate.com/en-gb/blog/tag/gas) - [Life Cycle Cost (1)](https://blog.fibergrate.com/en-gb/blog/tag/life-cycle-cost) - [Machinery Guard (1)](https://blog.fibergrate.com/en-gb/blog/tag/machinery-guard) - [Marine (1)](https://blog.fibergrate.com/en-gb/blog/tag/marine) - [Material Costs (1)](https://blog.fibergrate.com/en-gb/blog/tag/material-costs) - [Molded Grating (1)](https://blog.fibergrate.com/en-gb/blog/tag/molded-grating) - [Oil (1)](https://blog.fibergrate.com/en-gb/blog/tag/oil) - [Reliability (1)](https://blog.fibergrate.com/en-gb/blog/tag/reliability) - [Substation (1)](https://blog.fibergrate.com/en-gb/blog/tag/substation) - [Substation Enclosures (1)](https://blog.fibergrate.com/en-gb/blog/tag/substation-enclosures) - [Substation Expansion (1)](https://blog.fibergrate.com/en-gb/blog/tag/substation-expansion) - [Telecom (1)](https://blog.fibergrate.com/en-gb/blog/tag/telecom) - [Transformer Cages (1)](https://blog.fibergrate.com/en-gb/blog/tag/transformer-cages) - [Wall Fan Screens (1)](https://blog.fibergrate.com/en-gb/blog/tag/wall-fan-screens) - [Wastewater Treatment Works (1)](https://blog.fibergrate.com/en-gb/blog/tag/wastewater-treatment-works) - [awning (1)](https://blog.fibergrate.com/en-gb/blog/tag/awning) - [handrails (1)](https://blog.fibergrate.com/en-gb/blog/tag/handrails) - [manufacturing (1)](https://blog.fibergrate.com/en-gb/blog/tag/manufacturing) - [moulded grating vs pultruded grating (1)](https://blog.fibergrate.com/en-gb/blog/tag/moulded-grating-vs-pultruded-grating) - [oil and gas (1)](https://blog.fibergrate.com/en-gb/blog/tag/oil-and-gas) - [parks and playgrounds (1)](https://blog.fibergrate.com/en-gb/blog/tag/parks-and-playgrounds) - [phenolic grating (1)](https://blog.fibergrate.com/en-gb/blog/tag/phenolic-grating) - [recreation (1)](https://blog.fibergrate.com/en-gb/blog/tag/recreation) - [shade structure (1)](https://blog.fibergrate.com/en-gb/blog/tag/shade-structure) - [sound barrier walls (1)](https://blog.fibergrate.com/en-gb/blog/tag/sound-barrier-walls) - [sunscreen (1)](https://blog.fibergrate.com/en-gb/blog/tag/sunscreen) - [work platforms (1)](https://blog.fibergrate.com/en-gb/blog/tag/work-platforms) See all #### Related Articles [Safety](https://blog.fibergrate.com/en-gb/blog/tag/safety), [Glass Reinforced Plastic](https://blog.fibergrate.com/en-gb/blog/tag/glass-reinforced-plastic), [GRP](https://blog.fibergrate.com/en-gb/blog/tag/grp), [Fibreglass grating](https://blog.fibergrate.com/en-gb/blog/tag/fibreglass-grating) ##### [The Benefits of GRP Trench Drain Covers](https://blog.fibergrate.com/en-gb/blog/the-benefits-of-grp-trench-drain-covers?hsLang=en-gb) Trench drain grate covers are used in a wide range of industries to help manage water drainage,... [Read more](https://blog.fibergrate.com/en-gb/blog/the-benefits-of-grp-trench-drain-covers?hsLang=en-gb) [Safety](https://blog.fibergrate.com/en-gb/blog/tag/safety), [Aqua Grate](https://blog.fibergrate.com/en-gb/blog/tag/aqua-grate), [GRP](https://blog.fibergrate.com/en-gb/blog/tag/grp) ##### [GRP Catwalk Grating: Material Selection Guide](https://blog.fibergrate.com/en-gb/blog/grp-catwalk-grating-material-selection-guide?hsLang=en-gb) Trench drain grate covers are used in a wide range of industries to help manage water drainage,... [Read more](https://blog.fibergrate.com/en-gb/blog/grp-catwalk-grating-material-selection-guide?hsLang=en-gb) [Safety](https://blog.fibergrate.com/en-gb/blog/tag/safety), [Glass Reinforced Plastic](https://blog.fibergrate.com/en-gb/blog/tag/glass-reinforced-plastic), [GRP](https://blog.fibergrate.com/en-gb/blog/tag/grp), [Moulded Grating](https://blog.fibergrate.com/en-gb/blog/tag/moulded-grating), [Fibreglass grating](https://blog.fibergrate.com/en-gb/blog/tag/fibreglass-grating) ##### [Know Your GRP Applications: Open Grating, Grating Cover, and GRP Plate](https://blog.fibergrate.com/en-gb/blog/know-your-grp-applications-open-grating-grating-cover-and-grp-plate?hsLang=en-gb) Trench drain grate covers are used in a wide range of industries to help manage water drainage,... 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