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NWH-MUSHROOM-KEEP-NV
Retrofit Night Vent Keep For Roller/Mushroom Espag
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Retrofit Night Vent Keep For Roller/Mushroom Espag
In stock
Delivery Information
| Delivery Time Frame | Delivery Information |
| Next Working Day By 1PM | When an order is placed by 3pm for next working day on certain items |
| Standard Delivery | Usually delivered in 2 to 4 working days |
| Delivery Charges | |
| UK Mainland | Prices start at £3.95 for very small items, £6.50 for small, £9.50 for medium and £20 for large/long items |
| Scottish Highlands & Islands, Northern Ireland & Ireland | Prices from £30, please see our delivery page for more info. |
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£5.40
Incl. VAT
£4.50
Excl. VAT
Incl. VAT
Excl. VAT
Incl. VAT
Excl. VAT
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Description
Window Hardware Components
Universal Retrofit Night Vent Keep for Roller or Mushroom Espag Systems
Finding a suitable replacement component for older window locking systems often presents a significant challenge for maintenance teams and homeowners alike because many original hardware designs have long since been discontinued. This versatile retrofit keep bridges that gap by providing a universal solution that accommodates both roller and mushroom cam espag bolts, which means you can streamline your inventory without needing to stock multiple specialized parts for different window installations.
Crafted to offer long-term reliability in demanding domestic environments, this component prioritises functional durability above everything else. It is finished to withstand the daily mechanical stresses associated with opening and closing heavy window sashes frequently, so it remains a dependable choice for residential repairs or window refurbishment projects where maintaining the original integrity of the locking mechanism is the primary goal.
52mm
TOTAL COMPONENT LENGTH
37mm
TOTAL COMPONENT WIDTH
6mm
OVERALL COMPONENT DEPTH
Universal
ROLLER MUSHROOM SUITABILITY
Why Choose the Retrofit Night Vent Keep For Roller or Mushroom Espag
This component provides a practical fix for window ventilation issues while remaining compatible with a wide array of existing espag locking hardware configurations.
Dual Functionality Hardware
The unique design allows this single keep to accept both mushroom cams and roller cams without requiring adjustments or complex modifications to the window frame. It simplifies the repair process for maintenance professionals because you no longer need to identify specific cam profiles before arriving at the job site to perform a quick window repair.
Improved Ventilation Control
Securing a window in the night vent position is essential for maintaining air quality in bedrooms or living areas during warmer periods. This keep provides a firm locking position that holds the sash slightly open, which helps fresh air circulate throughout your home while keeping the window locked firmly against casual entry attempts.
Simplified Retrofit Installation
Designed specifically for older windows that may have lost their original keep efficiency, the compact 52mm profile fits many common PVC or timber window frames with ease. The dimensions allow it to replace worn or damaged parts effectively because it occupies a similar footprint to older, less versatile hardware that is no longer available.
Engineering Quality and Daily Performance
Every element of this keep is engineered to provide a stable contact point for your espag mechanism so that your window closure remains secure and weather-tight.
Mechanical Load Distribution
The geometry of the keep is carefully calculated to manage the force exerted by the locking cam during the engagement cycle of the window handle. By distributing this pressure evenly across the frame interface, the part reduces wear on the internal gearbox of your espag, which helps extend the overall lifespan of the entire window locking system significantly.
Because the material selection focuses on strength, the keep resists deformation under repeated use scenarios. This reliability is especially important in high-traffic rooms where windows are opened or adjusted for ventilation every single day, so you can trust that your security remains consistent even after thousands of operational cycles have been completed on the window frame.
Weather Resistance and Long Term Finish
Exposure to moisture or temperature fluctuations can often lead to the corrosion of window hardware, which impacts both the operation and the visual appearance of the frames. This keep is finished to resist standard atmospheric conditions, which helps prevent the surface degradation that often plagues cheaper, non-specialised alternatives when installed in exposed coastal or damp suburban environments.
By maintaining its structural integrity over time, the component keeps your window gaskets properly compressed against the frame. This compression is fundamental for stopping drafts and preventing water ingress during heavy rainfall, which helps keep your interior spaces dry and energy-efficient throughout the various seasons of the year while the windows are fully locked and in the closed position.
Installation and Operational Workflow
Fitting this replacement component is a straightforward process that requires minimal tools when you follow a logical approach to aligning the hardware correctly.
1
Preparation and Alignment
Remove the existing damaged keep from the window frame while taking care to note the exact position of the screw holes. Place the new keep over the original mounting points to ensure the orientation matches the sweep of your existing roller or mushroom cam, which provides the correct latching action when the window is closed.
2
Securing the Component
Drive the mounting screws into the frame while ensuring the keep remains perfectly square to the espag bolt travel path. Use a manual screwdriver rather than a high-torque power tool because this avoids stripping the plastic or timber substrate where the screw threads need to bite firmly for long-term hold.
3
Testing the Engagement
Operate the window handle through its full range of motion to ensure the mushroom or roller cam sits deeply within the keep recess. If the handle feels stiff, adjust the positioning of the keep slightly until the locking action feels smooth and consistent throughout the entire closing stroke of the window sash mechanism.
Expert Installation and Care Tip
Check the compression level after fitting by closing the window against a strip of paper to see if it catches firmly at the keep location. Clean any residual debris from the frame track before installation to ensure the keep sits flush against the surface, which prevents unnecessary stress on the mounting screws.
Technical Specifications
| Feature | Rating / Standard | Practical Details |
|---|---|---|
| Total Length | 52mm | Fits within standard routing channels on most window profiles. |
| Total Width | 37mm | Provides a stable base for secure mounting to the frame. |
| Total Depth | 6mm | Standardised thickness suitable for most modern window rebates. |
| Compatibility | Universal | Suits both mushroom and roller type espag locking bolts. |
Longevity and Trade Reliability
This hardware provides a cost-effective solution for long-term window maintenance because it is manufactured to meet the rigorous demands of professional window repair. Its ability to serve two different hardware types reduces logistical complexity for tradespeople and ensures you have a reliable part on hand for urgent repair calls.
Compatibility and Fitting Notes
Verify that your current espag locking mechanism is in good working order before installing a new keep to ensure the system functions correctly.
Check the depth of your existing frame profile to ensure the 6mm component depth provides the required engagement for your specific mushroom or roller cam.
Contact our friendly support team if you require assistance identifying your specific window profile or if you are uncertain about compatibility with your current locking hardware.
Specification
| Finish | Zinc |
|---|