Insulation Fixings and Washers Types: Ultimate Guide 2025
Insulation Fixings and Washers Types: Comprehensive Guide
Insulation fixings and washers are critical components for external wall insulation (EWI) systems, ensuring structural integrity while maintaining thermal performance. Simple Solutions 4 U provides premium solutions for insulation projects, combining expertise with top-tier products from leading manufacturers.
Understanding Insulation Fixings and Washers Types
Insulation fixings secure insulation boards to substrates, while washers distribute load and prevent compression damage. Proper selection ensures long-term system performance and compliance with building codes.
Common Types of Insulation Fixings
- Mechanical Fixings: Plastic or metal pins hammered into substrates (e.g., Rawlplug ISOFAST for concrete)
- Screw Fixings: Threaded pins (e.g., EJOT ejotherm STR U Timber Fix Screw with Washer)
- Fire-Rated Fixings: Zinc-plated steel with 90-minute fire resistance (e.g., Rawlplug Fire Rated Insulation Facade Fixings)
Washer Variants
| Type | Material | Application |
|---|---|---|
| Plastic Washers | HDPE | Soft insulation boards (EPS/XPS) – ideal for EPS board applications |
| Metal Washers | Stainless Steel | Rigid boards (mineral wool/rockwool) – commonly used with glass fibre mesh |
| Fender Washers | Galvanized Steel | High-load scenarios – paired with heavy-duty adhesives |
Material Selection Criteria
- Thermal Performance: Plastic washers minimize thermal bridging – explore thermal bridging solutions
- Load Capacity: Metal washers handle heavy insulation boards – suitable for mosaic render applications
- Fire Resistance: Zinc-plated fixings meet fire safety standards – essential for fire-rated systems
Installation Best Practices
- Drill pilot holes aligned with insulation board centers
- Insert washer into insulation surface using professional foam guns
- Drive screw into substrate (minimum 40mm clearance beyond insulation thickness) – ensure proper curing conditions
Case Studies
Residential EWI Retrofit
A 3-bed semi-detached home in Manchester used EJOT IT/S 5/60 insulation washers with Rawlplug Fire Rated Fixings, achieving improved U-values and compliance with PAS 2035 standards.
Commercial Insulation Upgrade
An office complex utilized SPAX® Plast-Grip® ci prong washers for rigid foam board attachment, reducing thermal bridging by 40% compared to traditional methods.
Why Choose Simple Solutions 4 U?
15 Years of Expertise
Specializing in EWI systems and through-coloured renders, our team ensures optimal fixing selection for every substrate type – from solid brick to lightweight concrete. Discover our company expertise.
Top-Tier Product Range
- Fire-rated fixings from Rawlplug and EJOT
- Plastic washers for soft insulation boards – ideal for EPS applications
- Thermal-bridging solutions from SPAX®
Competitive Pricing & Trade Discounts
Receive bulk pricing on insulation fixings and washers, including exclusive trade discounts for contractors and developers. Explore our product range or visit our shopping cart for quick purchases.
Contact Us
For tailored solutions, call 07877 329 472 or email info@simplesolution4ushop.co.uk. Visit our website to explore our full product range. Stay updated with industry insights from our blog.
