Can you plaster over these?

I used these washers to fix insulation panels to the underside of the roof joists in our loft - so no plastering involved. They were excellent for what I needed. The most common use for these washers is to fix insulation panels to the outside of a building, which would then be rendered over. The rendering would normally be at least 15mm thick, so would cover the washers. If you are using the washers to fix panels internally they would probably be ok, but it is important to ensure they are tightly screwed to prevent movement, and the plaster thickness is also sufficient to cover the washers/screws - say 12mm. Ensure the correct screws are used, e.g. proprietary plasterboard screws, which will not discolour the plaster over time. Hope this helps. J

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Load Spreading 60mm Polypropylene washers for Fixing and Supporting All Types of Soft to Medium Insulation Panels and Sheets – 100PCS

Load Spreading 60mm Polypropylene washers for Fixing and Supporting All Types of Soft to Medium Insulation Panels and Sheets – 100PCS

Product ID: 68597454

Details

Exterior finish
Natural
Fastener size
4 5 or 6mm
Material
Polypropylene
Outside diameter
60 Millimetres
Washer type
Flat

📏60mm diameter for max load spread

♻️100% recyclable virgin polypropylene

⚙️4.2mm low profile for sleek fixing

€ 45.67

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Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Elevate your insulation game with precision and style!

ECO CONSCIOUS MATERIAL - Made from tough, chemical-resistant virgin polypropylene that's fully recyclable—build smarter and greener.
SLEEK LOW PROFILE DESIGN - Only 4.2mm thickness when fixed keeps installations flush and professional-looking without bulk.
OPTIMIZED LOAD DISTRIBUTION - 60mm diameter ensures superior support for soft to medium insulation panels, preventing damage and enhancing durability.
VERSATILE SCREW COMPATIBILITY - Perfectly fits 4, 5, or 6mm screws (5mm recommended) for seamless integration with your existing fixings.
PRECISION ENGINEERED UK QUALITY - Crafted with cutting-edge tech by Hawksworth Engineering for consistent, reliable performance every time.

These 60mm polypropylene load spreading washers, manufactured in the UK by Hawksworth Engineering, provide a low-profile, durable solution for fixing and supporting all types of soft to medium insulation panels. Designed for compatibility with 4-6mm screws and made from 100% recyclable virgin polypropylene, they ensure reliable load distribution and chemical resistance, making them an essential upgrade for professional-grade insulation installations.

Specifications

ASIN	B07B1RL4WY
Best Sellers Rank	51,147 in DIY & Tools ( See Top 100 in DIY & Tools ) 339 in Washers
Brand Name	hawkeng
Colour	Natural
Compatible Groove Diameter	6E+1 Millimeters
Country Of Origin	United Kingdom
Customer Reviews	4.6 4.6 out of 5 stars (725)
Exterior Finish	Natural
Fastener Size	4, 5, or 6mm
Fastener Type	Flat Washer
Finish Types	Natural
Grade Rating	standard
Item Diameter	60 Millimetres
Item Thickness	5.2 Millimetres
Item Weight	4.3 Grams
Manufacturer	Hawksworth Engineering
Manufacturer Part Number	INS60PPNAT100
Material Type	Polypropylene
Number Of Items	100
Number of Pieces	100
Outside Diameter	60 Millimetres
Screw Head Style	Round
Set Name	100
Size	60mm x 5.2mm
Thread Size	5 mm
Unit Count	100.0 count
Washer Application	construction
Washer Compatibility	screws
Washer Type	Flat

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