🛁 Premium Hot Tub Cover 236 x 236 cm (R35) – Weathershield Protection

Superior insulation for your extra-large spa with highly rounded corner design.

📋 Product Overview

This Premium Hot Tub Cover delivers exceptional thermal performance and robust weather protection for your extra-large square hot tub. Constructed with advanced Weathershield fabric and featuring an aluminium-wrapped foam core, this cover is purpose-built to handle the demands of British weather while keeping your spa water warm and ready.

Designed for 236 cm x 236 cm square spas with 35 cm corner radius, this cover utilises a tapered foam construction (12 cm centre to 8 cm edge) that ensures efficient rainwater runoff. The galvanised steel C-channel reinforcement delivers dependable structural support throughout the cover’s lifespan.

The 35 cm corner radius makes this cover ideal for spas with very rounded, almost circular corners. Combined with the generous 236 cm dimension, this is one of the largest covers in the premium range, suitable for party-sized hot tubs. Certified to ASTM F 1346-91 safety standards.

✨ Key Features

• ✅ Weathershield Fabric – High-performance exterior resistant to sun and rain damage
• ✅ Aluminium-Wrapped Core – Superior heat retention technology
• ✅ Tapered Design (12 cm to 8 cm) – Efficient rainwater drainage
• ✅ 25 kg/m³ Foam Density – Premium insulating foam core
• ✅ Galvanised Steel C-Channel – Robust structural reinforcement
• ✅ ASTM F 1346-91 Certified – Recognised safety certification
• ✅ 15 cm Skirt Length – Secure fit around spa edges
• ✅ Square Shape with Highly Rounded Corners – 35 cm radius for circular-style corners
• ✅ Black Colour – Timeless finish for any installation

🔧 Technical Specifications

Specification	Value
SKU	COV-12741
Shape	Square (Rounded corners)
Length	236 cm
Width	236 cm
Corner Radius	35 cm
Thickness (Centre)	12 cm
Thickness (Edge)	8 cm
Taper	12 cm to 8 cm
Skirt Length	15 cm
Cover Material	Weathershield Fabric
Colour	Black
Foam Density	25 kg/m³
Core Construction	Aluminium Wrapped
Structural Reinforcement	Galvanised Steel C-Channel
Certifications	ASTM F 1346-91

📐 Size Guide & Measuring Instructions

How to Measure Your Spa

Measurement	How to Measure
Length	Measure longest side, outer edge to outer edge
Width	Measure shortest side, outer edge to outer edge
Corner Radius	Measure from corner to where curve begins
Skirt Drop	Measure from lip to desired cover edge

This Cover Fits

Dimension	Specification
Spa Size	236 x 236 cm
Corner Radius	35 cm
Shape	Square with highly rounded corners

⚠️ Important: Measure your spa carefully. An ill-fitting cover reduces insulation efficiency and may not seal properly.

💡 Tip: This cover features a 35 cm corner radius, designed for spas with very rounded, almost circular corners. The 236 cm dimension is one of the largest available for extra-large party spas.

🌡️ Insulation & Energy Efficiency

Insulation Performance

Metric	Value
Centre Thickness	12 cm
Edge Thickness	8 cm
Foam Density	25 kg/m³
Core Enhancement	Aluminium Wrapped

Design Benefits

The tapered foam construction delivers multiple advantages:

• ✅ Water Runoff – The slope from 12 cm centre to 8 cm edge allows rainwater and debris to drain naturally
• ✅ Structural Support – Thicker centre section provides robust support under load
• ✅ Heat Retention – Aluminium wrapping reflects heat back into the spa water

🔬 Materials & Construction

Exterior Cover

Component	Specification
Material	Weathershield Fabric
Colour	Black
Protection	Sun and rain damage resistance

Foam Core

Component	Specification
Density	25 kg/m³
Enhancement	Aluminium Wrapped
Taper	12 cm to 8 cm

Structural Elements

Component	Specification
Reinforcement	Galvanised Steel C-Channel
Certification	ASTM F 1346-91

🛡️ Weatherproofing & Durability

Weather Resistance

Condition	Protection
☀️ Sun Exposure	Weathershield fabric guards against UV damage
🌧️ Rain/Water	Weathershield protection + tapered design for drainage
❄️ Cold Weather	Aluminium-wrapped core for heat retention

UK Weather Suitability

• ✅ Weathershield fabric engineered to withstand British weather conditions
• ✅ Tapered design promotes efficient water runoff during rain
• ✅ Galvanised steel reinforcement resists corrosion in damp climates

⚙️ Installation Guide

Positioning Your Cover

1. Position the cover – Place the cover on your spa with the hinge centred
2. Check the fit – Ensure the skirt hangs evenly on all sides (15 cm skirt length)
3. Verify seating – The cover should sit flat on the spa acrylic lip
4. Secure with straps – Use straps to secure the cover in place

Installation Tips

⚠️ Ensure cover sits flat on spa acrylic lip

⚠️ Hinge should be centred across the spa

⚠️ Skirt should hang evenly on all sides

💡 Note: Due to the larger size, consider having a second person assist with positioning.

🔄 Care & Maintenance

Regular Maintenance

Task	Frequency	Method
Clean surface	As needed	Mild soap and water
Condition fabric	Periodically	UV protectant spray
Check straps/clips	Regularly	Tighten or replace if worn
Inspect seams	Periodically	Look for cracks or separation
Clear debris	As needed	Soft brush or cloth

Cleaning Tips

✅ Use pH-neutral cleaners only

✅ Rinse thoroughly after cleaning

❌ Never use abrasive cleaners

❌ Never use bleach or harsh chemicals

❌ Never pressure wash

Signs Replacement May Be Needed

• Waterlogged foam (cover feels heavy)
• Cracked or peeling exterior
• Broken or deteriorated hinge
• Visible mould inside foam
• Poor heat retention

📍 Ideal Applications

Application	Suitability	Notes
🏠 Home hot tub	✅ Excellent	Designed for domestic 236 x 236 cm spas
🏠 Garden spa	✅ Excellent	Weathershield fabric ideal for outdoor use
🏢 Holiday let	✅ Excellent	Durable construction for frequent use
🏢 Extra-large party spa	✅ Excellent	Suitable for 7-8+ person hot tubs

💬 Frequently Asked Questions

Q: What size spa does this cover fit?

A: This cover is designed for square spas measuring 236 x 236 cm with 35 cm corner radius.

Q: What is the skirt length?

A: The skirt length is 15 cm, providing secure coverage around your spa edges.

Q: What thickness is the foam?

A: The cover features a tapered design with 12 cm thickness at the centre tapering to 8 cm at the edges.

Q: Does this cover meet safety standards?

A: Yes, this cover is ASTM F 1346-91 certified.

Q: What colour is this cover?

A: This cover is available in black with Weathershield fabric exterior.

Q: How do I know when to replace my cover?

A: General signs include waterlogged foam (cover feels heavy), cracked or peeling exterior, damaged hinge, or noticeably reduced heat retention.

Q: How do I measure corner radius?

A: Measure from the corner point to where the curve begins. A 35 cm radius means the curve starts 35 cm from the corner on both sides, creating very rounded, almost circular corners.

Q: Is 236 cm a large hot tub size?

A: Yes, 236 cm x 236 cm is one of the largest standard sizes available, typically accommodating 7-8+ people comfortably.

Q: Will I need help lifting this cover?

A: Due to its larger size, using a cover lifter or having a second person assist is recommended for ease of use.

✅ Why Choose This Premium Hot Tub Cover

• ✅ Weathershield Fabric – Advanced protection against sun and rain damage
• ✅ Aluminium-Wrapped Core – Superior heat retention technology
• ✅ 25 kg/m³ Foam Density – Quality insulating material
• ✅ Galvanised Steel Reinforcement – Long-lasting structural support
• ✅ ASTM F 1346-91 Certified – Meets recognised safety standards
• ✅ Tapered Design – Efficient water drainage and robust support

🤝 Why Buy from Parts4Tubs

• ✅ UK-based company with local support
• ✅ Fast UK delivery
• ✅ Expert advice from spa specialists
• ✅ Competitive pricing
• ✅ Full warranty support
• ✅ Easy returns within 30 days
• ✅ Compatible accessories available
• ✅ Custom sizing assistance

⭐ Summary

This Premium Hot Tub Cover (236 x 236 cm, R35) features Weathershield fabric exterior with an aluminium-wrapped foam core at 25 kg/m³ density. The tapered design (12 cm to 8 cm) promotes efficient drainage while the galvanised steel C-channel provides structural integrity. ASTM F 1346-91 certified for safety. Complete with 15 cm skirt for secure coverage. One of the largest sizes in the range with highly rounded 35 cm corner radius, ideal for extra-large party spas.