Island Sirius Boat Cover Guide: Sizes, Materials & Prices

Introduction: Why Your Island Sirius Deserves a Bespoke Cover

Welcome, Island Sirius owners! If you're navigating the picturesque Trent & Mersey, Caldon, or Macclesfield Canals, you understand the importance of protecting your beloved 21ft vessel with its generous 7ft 8in beam. A bespoke boat cover from UK Boat Covers isn't just an accessory; it's an essential shield against the UK's unpredictable weather, canal-side grime, and relentless UV rays. This comprehensive guide, brought to you by Ryan's family-run business in Carterton, Oxfordshire, will walk you through everything you need to know about securing the perfect fit and superior protection for your Island Sirius. Protect your investment and enhance its longevity with a custom-crafted solution. For your Island Sirius, covers start from £979 for PVC and £1,089 for Acrylic.

Why Choose a Bespoke Cover for the Island Sirius?

The Island Sirius, with its distinct 21ft length and specific 7ft 8in beam, presents unique challenges that off-the-shelf, universal covers simply cannot meet. Its particular hull shape, cockpit configuration, and deck layout demand a cover tailored precisely to its contours. Universal options often result in poor fit, leaving gaps for water ingress, flapping in the wind, and providing inadequate UV protection, ultimately shortening the cover's lifespan and leaving your boat exposed. Our bespoke service ensures every curve and fixture of your Island Sirius is accounted for, providing a taut, secure, and aesthetically pleasing fit. Our renowned postal copy service means we can replicate your old cover's exact dimensions, guaranteeing a perfect custom fit without ever needing to see your boat.

See our Island Sirius model page for full specifications and cover options.

Cover Types Available for the Island Sirius

For your Island Sirius cruising the Trent & Mersey, Caldon, or Macclesfield Canals, several cover types offer distinct benefits. A bespoke tonneau cover provides excellent overall protection for the cockpit area when moored, keeping rain and debris out. For those who enjoy overnight stays or extended trips, a full canopy cover offers headroom and shelter, transforming your cockpit into a functional living space, ideal for unpredictable canal weather. Alternatively, a cockpit cover focuses on securing the primary seating area. During the off-season, a robust winter cover is paramount for long-term storage, shielding your boat from the harsh elements, ensuring it remains in pristine condition ready for the next canal adventure.

• Full Boat Canopy - Complete weather protection
• Tonneau Cover - Cockpit and deck coverage
• Cockpit Cover - Targeted cockpit protection
• Spray Hood - Windscreen and helm shield
• - Seasonal protection

Best Materials for Island Sirius Covers

Choosing the right material for your Island Sirius cover is crucial, particularly for its use on inland waterways. Our two primary options are heavy-duty PVC marine fabric and premium Acrylic canvas. PVC, known for its exceptional waterproofing and durability, is an excellent choice for winter storage or applications where maximum water exclusion is paramount. It offers robust protection against rain, frost, and debris encountered on canals. Acrylic, on the other hand, is highly breathable, superior in UV resistance, and retains its colour brilliantly. It prevents condensation buildup, making it ideal for regular use and prolonged periods of mooring where breathability is a priority. Both materials offer long lifespans, but Acrylic provides a more premium feel and better breathability.

Compare materials in detail: Our fabrics page | Material comparison guide

Measuring Your Island Sirius for a New Cover

Accurate measurements are paramount for a truly bespoke Island Sirius cover. While our postal copy service offers a foolproof method, if you're providing measurements, focus on precision. Begin with the overall length from the furthest point of the bow to the stern (21ft), ensuring to account for any overhangs or bowsprits. Next, measure the widest point of the boat, its 7ft 8in beam, ensuring your tape follows the curve of the hull. Essential additional measurements include height from the gunwale to the top of any windscreen, grab rails, or central console, and around the perimeter of your cockpit. Detailed photos of specific features will also assist our team in crafting a perfect, snug fit, eliminating errors often associated with generic patterns.

Need help? See our size guide or use our postal copy service to skip measuring entirely.

Island Sirius Cover Prices

Investing in a bespoke cover for your Island Sirius is a smart decision, and at UK Boat Covers, we ensure exceptional value. Our PVC covers start from a competitive £979, while our premium Acrylic options begin at £1,089. The final price is influenced by the cover's complexity, specific design features, and chosen material. What truly sets us apart is our commitment to transparency and savings: as a family-run business, we operate without VAT, meaning you save a significant 20% compared to many competitors. This makes our high-quality, custom-fit covers remarkably affordable, offering superior protection and longevity compared to ill-fitting universal alternatives. You get unparalleled bespoke quality without the added tax burden.

View full price list | Request a personalised quote

How to Fit a Cover on Your Island Sirius

Fitting your new bespoke Island Sirius cover from UK Boat Covers is straightforward thanks to its precision tailoring. Start by identifying the bow and stern, carefully draping the cover over the boat. Pay close attention to unique features like your windscreen position and any grab rails; your custom cover will have specific allowances for these. Begin securing attachment points evenly, working from bow to stern, ensuring the cover is taut but not overly stretched. The goal is a drum-tight fit to prevent water pooling, which can cause sag and mildew. Utilize the provided tie-down points to secure the cover firmly, especially around the 7ft 8in beam, to withstand wind and rain while promoting good ventilation and protecting your cherished Island Sirius.

Caring for Your Island Sirius Cover

Maintaining your Island Sirius boat cover is crucial for maximising its lifespan, especially with the unique conditions of the Trent & Mersey Canal. Regular cleaning with mild soap and water, avoiding harsh chemicals, will prevent mildew, algae, and grime buildup. For general dirt from canal environments, a soft brush and gentle rinse are usually sufficient. Periodically check for any tears or frayed stitching and address them promptly to prevent larger issues. During winter storage, ensure the cover is completely dry before folding and storing to prevent mildew. Proper care, coupled with the quality marine-grade fabrics we use, ensures your cover protects your Island Sirius for many years of happy cruising.

More tips: Cleaning guide |

Our Postal Copy Service for Island Sirius Owners

Our unique postal copy service is designed for Island Sirius owners seeking a perfect custom fit without the hassle of bringing their boat to us. The process is simple and incredibly efficient: you send us your existing, old boat cover – regardless of its condition. Our skilled craftsmen then use your original cover as a precise template, replicating every stitch and seam in new, high-quality marine-grade fabric. This guarantees an exact, bespoke fit for your 21ft Island Sirius. Once crafted, your brand-new, perfect-fit cover is dispatched back to you, often within a remarkable 6 working days. It's the ultimate convenience for obtaining a tailor-made cover with unmatched accuracy.

1. Post your old cover to UK Boat Covers, Carterton, Oxfordshire
2. We create a perfect copy using your old cover as a template
3. Choose PVC or Acrylic marine-grade fabric
4. Receive within 6 days via tracked UK delivery

Learn more about our postal service