Dowty Roof Washers - Black
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Unifix Black Dowty Roof Washers - M6 - 9Dowwash/015 - Roofing Fasteners - Box Of 100 - BlackFree delivery in 1–3 days£8.06Visit shop →
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B&Q - Black Dowty Roof WashersM69Dowwash/015Roofing FastenersBox Of 100Free delivery in 1–3 days£9.17Visit shop →
Product Information
Full details
The Unifix Dowty Roof Washers in black are an essential hardware solution for DIY enthusiasts and roofing professionals who require a weather-resistant, secure seal for outdoor fastening projects. These washers are engineered to provide reliable performance and prevent leaks in roofing applications, though users should ensure they are using the correct size compatibility for their specific fasteners to achieve the best results.
All features
| Colour | Black |
|---|---|
| Model Part Number | 9Dowwash/020 |
| Brand | Unifix |
Extended Product Information
FAQs
Are these washers UV resistant?
Yes, they are designed for outdoor use and are resistant to standard environmental factors including UV radiation.
Can I use these on any roofing material?
They are ideal for most standard roofing sheets, but ensure the washer size is appropriate for the screw gauge being used.
Do I need special tools to install them?
No special tools are required beyond the standard drill or driver used for your roofing screws.
What is the primary material of the seal?
The washers are built for industrial-grade weather sealing, utilizing materials chosen for long-term compression recovery.
Are these washers reusable?
It is not recommended to reuse roof washers, as the sealing material is designed to compress once and may not provide a reliable seal upon removal and re-installation.
Troubleshooting
Water leaking around the screw
Check if the fastener is tightened correctly or if the hole was drilled too large for the washer.
Washer appears cracked or brittle
Replace the washer immediately, as this indicates the material has reached the end of its service life or was exposed to extreme heat/chemicals.
Washer is spinning while tightening
Ensure the screw is perpendicular to the roof surface and not over-tightened, which can cause the washer to lose its grip.
Pros and Cons
Pros
- Excellent weather resistance for outdoor durability
- Provides a leak-proof seal for roofing fasteners
- Simple and intuitive installation process
- High-quality construction from Unifix
- Discreet black color blends with modern roofing
Cons
- Must be matched carefully with fastener diameter
- Not intended for structural load-bearing applications
- Limited to specific roofing hardware use cases
Setup, Compatibility & Care
To install, ensure that the roof surface is clean and debris-free around the fastening point. Slide the washer onto the fastener until it rests against the head. Drive the fastener through the roofing material until the washer begins to compress against the surface; avoid over-tightening, as this can degrade the seal material. These washers are generally compatible with standard roofing screws. For care, inspect the washers every 12 to 24 months during routine roof maintenance to check for signs of weathering or degradation. If any seal shows signs of cracking or hardening due to extreme environmental conditions, it is recommended to replace the washer to maintain the integrity of the roofing system.