A white metal sash jammer lock for uPVC windows and doors, including mounting screws.
Size chart and components for Home Secure sash jammer
Application instructions for Home Secure window/door sash jammer
Fitting instructions for the Home Secure window or door sash jammer
Home Secure promotional image highlighting features of a sash jammer product. Key points include: high quality construction, smooth operation, and screws supplied. The image shows two views of the white lock fitted on a uPVC door, along with a branded packet of screws
Examples of Home Secure sash jammers on doors. Left side shows a set of white uPVC patio doors with sash jammer locations highlighted at the top and bottom, labeled 'Door Fitting'. Right side shows a front door with decorative glass panels, highlighting the letterbox and sash jammer installation area, labeled 'Letterbox Lock'. Yellow circles indicate fitting points
Window fitting example for Home Secure sash jammers. Image shows a white uPVC window with the frame seal installed. Two yellow circles highlight the areas where the sash jammer is fitted around the window locking points
A white metal sash jammer lock for uPVC windows and doors, including mounting screws.
Size chart and components for Home Secure sash jammer
Application instructions for Home Secure window/door sash jammer
Fitting instructions for the Home Secure window or door sash jammer
Home Secure promotional image highlighting features of a sash jammer product. Key points include: high quality construction, smooth operation, and screws supplied. The image shows two views of the white lock fitted on a uPVC door, along with a branded packet of screws
Examples of Home Secure sash jammers on doors. Left side shows a set of white uPVC patio doors with sash jammer locations highlighted at the top and bottom, labeled 'Door Fitting'. Right side shows a front door with decorative glass panels, highlighting the letterbox and sash jammer installation area, labeled 'Letterbox Lock'. Yellow circles indicate fitting points
Window fitting example for Home Secure sash jammers. Image shows a white uPVC window with the frame seal installed. Two yellow circles highlight the areas where the sash jammer is fitted around the window locking points
Home Secure

Sash Jammers | Home Secure™ Extra Security Locks for uPVC Doors & WindowsSash Jammers

5.0 (5 reviews)
£4.99 £3.99 Sale SKU: HS4285
£4.99 £3.99
Order by 2pm for same-day dispatch
Eye visibility icon in black, representing monitoring, visibility, or visual deterrence, displayed on a transparent background.

Same-day dispatch on orders before 2pm

Fully tracked 2 working-day courier

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Frequently Asked Questions

A sash jammeris a small lever-operated device that clamps the window or door sash against its frame. When engaged, it prevents forced entry even if the main handle or lock is compromised.

Yes — thesesash jammersare designed for uPVC frames but can also be used on composite and timber doors. They’re especially effective for French doors, patio doors, and ground-floor windows.

For single doors or small windows, one at the handle side is usually enough. For larger doors (like double French doors), fit one at the top and one at the bottom for maximum protection.

Yes! They’re designed for simple DIY installation. Just screw into the frame, align the arm with the sash, and tighten — all fixings are included.

Absolutely — they act as a visible deterrent and a physical barrier. Even if a burglar bypasses your main lock, the engaged sash jammer stops the door or window from opening.
White Home Secure sash jammer fitted to a uPVC window frame. Extra security locks that reinforce uPVC windows and doors against forced entry. Extra window and door security, anti-intruder physical jammer, uPVC compatible. Also shown: Four features of the sash jammer: resists forced entry, visible deterrent, fits windows and doors, strong construction.White Home Secure sash jammer fitted to a uPVC window frame. Extra security locks that reinforce uPVC windows and doors against forced entry. Extra window and door security, anti-intruder physical jammer, uPVC compatible.
Four features of the sash jammer: resists forced entry, visible deterrent, fits windows and doors, strong construction.
Sash jammer in the locked position on a uPVC frame. Extra security locks, for uPVC windows and doors, quality construction.Sash jammer in the locked position on a uPVC frame. Extra security locks, for uPVC windows and doors, quality construction.
Simple, practical DIY security upgrade: step one mark the fixing holes, step two drill and screw the sash jammer to the frame.Simple, practical DIY security upgrade: step one mark the fixing holes, step two drill and screw the sash jammer to the frame.
Home Secure sash jammer fitted to a uPVC door.Home Secure sash jammer fitted to a uPVC door.
Home Secure sash jammer pack contents.Home Secure sash jammer pack contents.
Home Secure, The Security Specialists. Trusted by thousands of UK customers for practical, dependable security solutions designed for everyday use.Home Secure, The Security Specialists. Trusted by thousands of UK customers for practical, dependable security solutions designed for everyday use.
Product overview

Home Secure sash jammers add an extra locking point to inward-opening uPVC doors and windows. Turn the arm across the frame and the door or window can't be forced open, even if the main lock is attacked. Fit two on the inside of the letterbox flap and they make a letterbox lock.

Please note: sash jammers only work on doors and windows that open inwards. They are not for outward-opening doors or windows.

How many do I need?

  • 1: small window
  • 2: large window or single door (top and bottom)
  • 2: letterbox lock (on the inside of the letterbox flap)
  • 4: French doors (2 on each door, top and bottom)

We sold 680 sash jammers online in the last 12 months, about 4 per order.

What's in the pack

  • Sash jammer in white, made from metal with a powder-coated finish
  • 3 different sized button spacers and packers, for a neat fit on different profiles
  • uPVC screws for reinforced frames

Fitting

Ideal for

  • Ground-floor windows and back doors that open inwards
  • Letterbox security (as a letterbox lock)
  • Rental properties and ground-floor flats
  • Designed for uPVC frames, and also compatible with timber and composite

See more in our window and door security range, including the FlapGUARD for letterboxes.
Delivery & Returns

How much is delivery?

UK Mainland Delivery is £2.99 on all items no matter how many you order!

Northern Ireland, Scottish Highlands, Channel Islands £6.00.

We do not offer International Delivery (Ireland, France, Spain etc).

When will my order be dispatched?

Orders before 2pm (Monday to Friday) are usually dispatched same day but may take up to 24 hours.

When will I receive my item?

We ship on 2 working day courier. Fully Tracked. Tracking will be emailed on dispatch.

Special order items such as keyed alike locks will take longer to dispatch. Please refer to product description for lead times.

I haven't received my item?

Please email us your name, order number and date of purchase.

We prefer email as it allows us time to research and respond.

Returns Information

We operate a 30 day refunds and return policy.

If you change your mind you must return the product back to us within 30 days of delivery

Please include a copy of your invoice and a note stating reason for return.

Additional keys, locks keyed alike or built to code are non refundable as they are personalised made to order goods.

Any refund, which is due to a fault or other defect, will include a refund of the applicable delivery charges otherwise not.

It is the buyers responsibility to arrange the return of goods to us. We do not offer a collection service for returning items.

Items must be returned including original product packaging and accessories.

We reserve the right to refuse any returns that do not comply with this policy.

Please post returns to the following address:

Home Secure (Online)

Unit 5, Brookfield Drive

Liverpool, L9 7AJ

United Kingdom