Coastal Hardware
Suited Marine Grade Ironmongery
Specifying solid 316 stainless steel hardware ensures long-term protection against harsh weather, seaside air, and natural timber acids. Explore the full suited range below.
Coastal Specialist Ironmongery
Founded in 2003, Coastal Group is a Cornwall-based, family-owned manufacturer of top-tier architectural ironmongery. They specialize in external door and window hardware designed to elevate style, performance, and durability.
Through meticulous engineering and materials selection, Coastal delivers hardware that joiners, architects, and homeowners trust. Their suited hardware ranges ensure a seamless aesthetic match across all door and window elements.
Marine Grade
Solid 316 stainless steel for maximum corrosion resistance.
Performance
Backed by the industry-leading Performance for Life guarantee.
Suited Hardware
Matching design details across handles, letter plates, and escutcheons.
Suited Finishing Finishes
Coastal hardware is available in multiple premium suited finishes to customize your door:
- Satin Stainless Steel (SSS)
- Polished Stainless Steel (PSS)
- PVD Satin Brass
- PVD Polished Brass
- PVD Matt Black
BLU® 316 Marine Grade Stainless Steel
Standard external door hardware is often made of brass or low-grade steel, which tarnishes and corrodes quickly when exposed to weather, coastal air, or acid-heavy woods like Oak or Accoya.
Coastal's flagship **BLU®** range is manufactured from solid 316 Marine Grade Stainless Steel. It is engineered to withstand extreme salinity and environmental exposure, ensuring your door handles look pristine and perform smoothly for decades.
Marine Grade Steel
Significantly higher nickel and molybdenum content to resist pitting corrosion.
Physical Vapor Deposition Finish
Micro-thin hard layer protects brass and black colors against scratching and weathering.
Performance for Life™ Guarantee
Because BLU® is built to an uncompromising standard, Coastal provides an industry-leading lifetime guarantee. If your Marine Grade 316 hardware fails to perform, it will be replaced—providing complete confidence.
Download Lifetime Guarantee PDFInteractive Document & Media Library
Search and view our complete embedded library of catalogues, bifold posters, lock specifications, and material maintenance guides.
Door and Window Hardware Manual
Complete comprehensive specification manual for professional architects and joiners.
BLU - 316 Marine Grade Stainless Steel Hardware Range
The flagship range of Solid 316 Stainless Steel suited hardware for doors and windows.
DURATIQUE - Stainless Steel Antique Hardware Range
The world's first stainless steel black antique hardware collection with a lifetime guarantee.
BLU - Premium Quality Pull Handles
Premium pull handles, offset pull handles, and suite sets for modern entrance doors.
BLU - Five Stunning Finishes suited Door and Window Hardware
Showcase of five premium suited finishes: Satin, Polished, PVD Brass, and Matt Black.
Classic Suited Hardware for Front Entrance Doors
Suited hardware collections matching hinges, letter plates, handles, and lock escutcheons.
BLU - Sliding Door Hardware - Aluminium Doors
Architectural ironmongery designed specifically for modern aluminium sliding door systems.
Hardware Guide for Accoya
Essential hardware specification guidelines for doors and windows crafted from Accoya wood.
Care & Maintenance Guide
Although marine-grade stainless steel is incredibly durable, regular maintenance ensures it remains pristine and functions smoothly. As the name suggests, it is "stain-less", not "stain-free".
What is Tea Staining?
Tea staining is a cosmetic surface discolouration caused by salt or air contaminants sitting on the surface. It is **not rust** and does not affect the structural integrity or lifetime of the metal. It can be easily cleaned.
Step-by-Step Maintenance
Cleaning Frequency
Clean your door hardware immediately after fitting, and at least every **6 months** under normal conditions. For properties located in coastal or highly industrial environments, clean **bi-monthly** to prevent salt buildup.
Coastal Group DR121 Renovation Kit
We recommend Coastal's **DR121 Kit**. Use the **DR121-CL Cleaner** to lift tarnish, contamination, and surface dirt, then apply **DR121-CO Conditioner** to seal and protect the finish.
What to Avoid (Warning)
Do **NOT** use bleach, abrasive powder cleaners, caustic/acid-based liquids, or detergents containing chlorides. Avoid scouring pads, steel wool, or metal objects that can scratch the finish.
Watch Coastal Hardware In Action
See how Coastal Group manufactures high-quality architectural ironmongery and test its weather resistance.
Winkhaus EAV4+ Smart Lock
Discover keyless access and motorized security with the Winkhaus EAV4+ automatic multi-point locking system.
Care & Maintenance Guide
A step-by-step cleaning demonstration showing how to remove tea staining and protect solid stainless steel hardware using the DR121 Kit.
Upgrade to Marine Grade
Specify Coastal hardware for your new composite door installation. Contact our team in Yorkshire for styling advice and a free survey quote.