Friction Stays

Friction stays are essential uPVC window parts that allow casement windows to open to a specific angle while providing controlled resistance. These replacement window parts function as hinges with an adjustable mechanism to hold the sash in place. If your window struggles to stay open or feels loose, faulty friction stays could be the culprit.

What It Is

Friction stays, also known as casement window friction stays, are hinged arms fitted to the side of uPVC casement windows. They slide along a track and use friction – adjusted via a screw – to control how far and steadily the window opens. This design ensures safety and prevents the sash from swinging wildly in the wind.

Unlike basic hinges, friction stays limit the opening angle, often to 90 degrees or less. They are common in modern uPVC windows and vital for homes with children or overlooking busy areas.

How To Identify It

Spotting friction stays is straightforward if you know what to look for. Open your casement window and examine the side edge of the sash: you’ll see a long metal arm attached with a screw mechanism, sliding into a track on the frame.

Key identifiers include:

• An adjustable grub screw on the arm for tension.
• Handed design (left or right-facing).
• Markings like stack height or track width stamped on the metal.

If it’s not a simple butt hinge but has a sliding track, it’s likely a friction stay. Take a photo and contact us for confirmation.

Compatibility Factors

Not all friction stays fit every window, so compatibility hinges on several factors. Primarily, they must match the handedness: left-hand for windows opening from the left side when viewed from inside, and right-hand vice versa.

Other considerations include:

• Window type: Designed for outward-opening casement uPVC windows only – not sash, sliding, tilt-and-turn, or inward-opening.
• Frame material: Suited to uPVC; wooden frames may require different fittings.
• Manufacturer variations: Slight differences between brands like Maco, Roto, or AVS.

Always cross-check with your sash dimensions before ordering replacement window parts.

Measurements That Matter

Precise measurements prevent costly mismatches when sourcing friction stays. The two critical dimensions are stack height and track width.

• Stack height: Vertical distance from the top of the track to the bottom of the sash edge (common sizes: 350mm, 410mm, 450mm).
• Track width: Horizontal length of the sliding track (typically 300-450mm).
• Sash width: Overall window sash width influences stay length.

Measure with the window closed using a tape: note the position (top, middle, or bottom stack). Restricted friction stays for child safety or egress hinges for fire escape may have unique specs.

Common Naming Confusion

Friction stays often get mixed up with similar window parts. People sometimes call them “friction hinges,” but true hinges lack the sliding track and adjustable friction.

Beware of:

• Egress hinges: Similar but designed for full 180-degree escape openings in emergencies.
• Restricted friction stays: Shorter-opening versions for safety, not standard replacements.
• Standard hinges: Fixed pivot points without friction control.

This confusion leads to wrong orders – always verify the sliding arm feature.

Symptoms It Can Cause

Worn friction stays manifest in clear ways, signalling the need for window hinge / friction stay replacement. Common issues include the window sagging or slamming shut unexpectedly.

Watch for these symptoms:

• Window won’t stay open at the desired angle; it drifts closed.
• Rattling or creaking when open, especially in wind.
• Excessive play or wobbling in the sash – check our window won’t close guide for related issues.
• Difficulty adjusting the opening tension.

Early detection prevents further damage to the frame or seals. With 10+ years’ experience, our public liability insured and DBS-checked technicians handle these reliably.

Related Repairs

Faulty friction stays tie into broader uPVC window repairs, particularly hinge replacement. We specialise in friction stay swaps, including alignment and draught proofing adjustments.

Linked services include:

• Window handle replacement.
• Locking mechanism repairs.
• Toe and heel adjustments for smooth operation.

For non-standard windows like sash or tilt-and-turn, we don’t cover those – focus stays on casement uPVC. Book via /repairs/window-hinge-friction-stay-replacement or contact for a quote.

FAQs

What are friction stays used for?

Friction stays control the opening angle of casement windows, providing friction to hold the sash steady. They enhance safety and usability in uPVC frames.

How do I know if my friction stays are left or right handed?

View from inside: if the arm attaches to the left side of the sash for a left-opening window, it’s left-handed. Right-handed is the opposite.

Can I replace friction stays myself?

DIY is possible for handy homeowners with matching measurements, but professional fitting ensures alignment. Our local Sutton team offers precise uPVC window repairs.

What’s the difference between standard and restricted friction stays?

Restricted versions limit opening to around 90mm for child safety; standard ones allow fuller openings. Check stack height and track width for both.

Do friction stays fit wooden windows?

No, they’re tailored for uPVC casement windows. Wooden frames need compatible alternatives – we focus on uPVC services.

How long do friction stays last?

Typically 10-15 years with regular lubrication, but weather exposure accelerates wear. Adjust the screw periodically to extend life.

For tailored advice on replacement window parts, reach out at 020 8138 0796 or info@window-repairs-sutton.co.uk. We’re Sutton’s trusted choice for reliable, insured repairs.