Fixed security grilles for windows and doors in London & Herts
Strong, high quality, metal bars permanently fixed to windows and doors are highly effective at deterring intruders and preventing break ins. As experienced specialists in security grilles in London we install high quality, made to measure fixed security grilles for windows and doors to secure residential and commercial properties.
Well designed, high quality permanent security grilles remain one of the most effective forms of physical window and door protection because they provide a physical barrier which not only deter but also prevent intrusion. This makes fixed security grilles for windows and doors, commercial security grilles and security grilles for house windows a popular choice for properties that need long-term protection.
Why choose fixed security grilles?
Some of the many reasons to choose fixed window security grilles installation for your property are that they;
- Provide permanent protection
- Act a a strong visual deterrent
- Require minimal maintenance
- Provide high security for vulnerable windows and doors
- Have a long service life
- Are available in bespoke designs that complement different property styles
- Can be installed internally or externally, depending on the property
- Can be designed for homes, shops, offices, schools and commercial buildings
Fixed security grilles are often the preferred solution for basement windows, side access windows, ground-floor windows, storage rooms and other vulnerable openings where permanent protection is more important than regular access.
Installer’s recommendation
Fixed security grilles vs retractable security grilles
When choosing between fixed security grilles and retractable security grilles installation it is advisable to seek professional advice because there are several factors to consider.
| Feature | Fixed security grilles | Retractable security grilles |
| Security | Excellent permanent protection | Excellent when locked |
| Visibility | Permanent, although designs can be discreet | Can be folded away when not in use |
| Maintenance | Very low | Low |
| Everyday access | Permanent barrier | Opens when required |
| Best suited to | Ground-floor windows, basement windows, vulnerable openings and areas that do not need regular access | Frequently used doors and windows, patio doors and commercial entrances |
| Cost | Often lower | Usually higher due to moving parts |
A security grilles specialist can advise what will work best for your particular property. The righ option will depend on the window or door type, which way it opens, available fixing points, access needs and personal preference. For example, the type of windows, which way they open, and space for fixing are important factors in addition to convenience and personal preference.
In general, retractable security grilles are often best suited to patio doors and frequently used access points, whereas fixed security grilles are often suited to Georgian-style windows, basement windows, vulnerable side windows and areas that need permanent protection. However, each property varies, so there is no set rule. Sometimes a combination of fixed grilles and retractable grilles is ideal (as shown in the image above).
Contact IKS Locksmiths to arrange a bespoke security grilles survey with an experienced specialist.
Where fixed security grilles work best
Fixed security grilles are suitable in a wide range of residential and commercial situations. They are particularly useful where a window or door is vulnerable, hidden from view or does not need to be opened as an access point.
House windows
Fixed window security bars are commonly used for basement windows, ground-floor house windows and other vulnerable openings.
External fixed security grilles are often suitable for inward-opening windows. Outward-opening windows can also be accommodated with bespoke fixed security grilles, such as belly bars, depending on the window style.
A security survey is recommended when planning security grilles for house windows because the right solution depends on the property, the window type, the opening direction and the preferred appearance.
Sash windows
Fixed security grilles for sash windows are commonly used on ground-floor windows where high security is required and the window is not a primary fire escape.
They can be suitable for empty properties, store rooms, basement rooms and other vulnerable areas where permanent protection is useful.
Patio doors
Fixed security grilles for patio doors are only suitable where regular access is not required, the doors are not an escape route and permanent protection is the priority.
Where patio doors are used regularly, retractable security grilles are usually a more practical solution because they can be opened and closed when needed.
Commercial premises and Offices
Fixed security grilles for commercial buildings are a strong option where high levels of security are required. They are often used to secure the rear of a property, storage rooms, high-level windows, side access windows and small vulnerable openings.
For commercial premises, it is worth consulting commercial security grilles specialists to compare fixed grilles, retractable grilles and other physical security options.
Shops
Shop fixed security grilles are suited to rear and side shop windows, storage rooms, empty rooms and other areas where visibility and permanent protection are useful.
For shopfronts or customer entrances, retractable grilles may be more practical if the opening is used throughout the day.
Schools
Fixed security grilles are recommended for vulnerable doors and windows in schools, especially in areas with high-value items such as technology, equipment or sensitive records.
They are also suitable for areas that are usually vacant or not used as regular access points.
Basement windows
Fixed grilles are a common choice for vulnerable basement level windows that are hidden from view and not used as a fire escape.
Basement windows are often targeted because they are less visible from the street, so permanent security grilles can provide valuable protection.
Choosing the right fixed security grille
Always seek advice from a security grilles specialist when choosing the best fixed security grilles for your property. There are several factors to consider when choosing the most appropriate grille design and installation.
There are different types of security grilles including;
- Fixed burglar bars
- Georgian security bars
- Decorative fixed grilles
- Fixed bar grilles
- Invisible-style window security bars
- Internal fixed security grilles
- External fixed security grilles
External or internal fixed security grilles installation
Should security bars be installed inside or outside? A specialist is best placed to advise on internal or external fixed security grilles installation based on factors such as:
- Property type
- Window style
- Window opening direction
- Surrounding walls
- Internal space
- External obstructions
- Floor level and access
- Intended use
- Desired appearance
- Emergency escape routes
- Planning and property restrictions
Internal fixed security grilles are often preferred where the exterior appearance of the property needs to be preserved. External fixed security grilles can provide a strong visible deterrent and may be more suitable where internal fitting is not practical.
Reveal fixed security grilles v face fixed grilles
Reveal fixed security grilles are installed within the window or door opening. Face fixed security grilles are fitted in front of the reveal, onto the wall face or surrounding structure.
The right fixing position depends on the property configuration. Choosing the most appropriate option can improve security, appearance and usability.
Decorative options
If you prefer decorative fixed security grilles, it is important to seek professional advice to ensure that the security level are not compromised by the look of the design.
An experienced specialist can help balance and protection of the fixed security grilles. Some clients prefer decorative security grilles, while others ask for invisible window security bars or discreet Georgian security grilles.
At IKS Locksmiths, we are experienced in balancing what works best for security with what the customer prefers aesthetically.
Colour matching
Choose from standard colours such as (listed in order of popularity);
- White
- Black
- Anthracite grey
- Cream
- Brown
Bespoke colour matching is also available. We have colour matched fixed grilles to a range of finishes, including obsidian blue, antique gold and bottle green.
Powder-coated finishes
External grilles require a powder-coated finish to protect against weather and environmental exposure. A powder-coated finish helps reduce dirt build-up and rust, while giving the grille a neat appearance.
Fixed bar spacing, thickness and shape
Fixed bars are normally spaced 100mm apart or less, unless they are Georgian security grilles, which use both vertical and horizontal bars.
Bar thickness varies depending on where the grilles are fitted and the level of security required. Typically, internal fixed bars are 12mm thick, whilst external fixed bars are 16mm or 20mm thick.
Bars can be square or round. Round bars being slightly more expensive and are often popular for externally fitted grilles because the shape makes them more resistant to being gripped and broken with tools.
The ideal combination of choices gives the property the right balance of security, usability, appearance and value for money.
Made to measure fixed security grilles
Bespoke made-to-measure fixed security grilles are custom designed and manufactured to fit the specific window or door opening.
Off the shelf security grilles are less common because many windows or door are not a standard size or configuration. A made-to-measure fixed grille can be designed around the opening direction, fixing points, frame, handles and the appearance of the property.
Choosing made-to-measure fixed security grilles helps achieve:
- A secure and tidy installation
- A better fit around the window or door
- A stronger final result
- A more discreet or decorative appearance
- Better usability, especially where windows still need to open
- A design suited to the property rather than a generic product
As mentioned in the section ‘Choosing the right fixed security grille’ above, there are many factors to consider before manufacturing and installing fixed grilles. This is why there is strong value in choosing bespoke fixed security grilles measured and fitted by an experienced installer.
What we assess during a professional survey
An IKS Locksmiths security grilles survey provides a full assessment of the factors needed to design and install suitable anti-theft window or door grilles for your property.
Areas we assess are:
- Property type and style
- Window or door style
- Window opening direction
- Fixing points
- Surrounding brickwork – for a strong fixing
- Fire escape considerations
- Desired appearance
- Customer preferences
A holistic approach to the security grilles planning process makes a significant difference to the final result.
Frequently asked questions
Are fixed security grilles more secure than retractable grilles?
Fixed grilles are not more secure than retractable grilles when locked. However, retractable grilles are not secure when they are unlocked, and fixed grilles are always in the secured position. Therefore, fixed grilles are more secure than unlocked retractable grilles.
Fixed grilles are usually recommended where permanent protection is required. Retractable grilles are usually recommended where regular access is needed.
Can fixed security grilles be installed inside or outside?
Yes, fixed grilles can be installed inside or outside. The best option depends on the property, window style, opening direction, fixing points, access and desired appearance. It is advisable to seek professional advice on which is the best option for your particular property.
Can windows still be opened?
Yes, windows can absolutely still be opened when the fixed security grilles are well designed to suit the window type and opening direction.
This is a key consideration when designing made-to-measure fixed security grilles. Options such as belly bars or cut-outs may be used depending on the window design.
Are fixed security grilles suitable for sash windows?
Yes, fixed security grilles are suitable for sash windows. The windows can still open for ventilation when the grilles are designed and installed correctly.
Georgian-style fixed grilles can be a discreet option for sash windows and period-style properties.
What is the difference between reveal fixed and face fixed security grilles?
Reveal fixed security grilles are installed within the window or door opening. Face fixed security grilles are fitted in front of the opening, on the surrounding wall face.
The best choice depends on the available fixing points, the window or door design and the appearance you want.
Can fixed security grilles be colour matched?
Yes, bespoke fixed security grilles can be colour matched. Standard colours are available, and bespoke finishes can be discussed during the design stage.
Do fixed security grilles require maintenance?
Fixed security grilles require minimal maintenance because they do not have moving parts. Internal fixed grilles are especially low maintenance because they are not exposed to weather.
External fixed grilles should have a suitable powder-coated finish to protect against outdoor conditions.
Are fixed security grilles suitable for commercial buildings?
Yes, fixed grilles are suitable for commercial buildings. They are often used for offices, shops, schools, storage areas, rear access windows and other vulnerable openings.
They can be a cost-effective physical security option compared with roller shutters or retractable gates, depending on the property.
Can fixed security grilles be fitted to patio doors?
Fixed grilles can be fitted to patio doors, but they will block access. For patio doors used regularly, retractable security grilles are usually more suitable because they can be opened and closed as needed.
Fixed grilles may only be suitable for patio doors where regular access is not required and the doors are not an escape route.
Request a free quotation
Wondering how much do security grilles cost? Contact IKS Locksmiths to arrange a security grilles quotation. We will advise on the most suitable design and installation option, assess the property and take precise measurements.
IKS Lockmsiths are a mobile MLA-approved locksmith in Barnet specialising in locks, security grilles and safes installation. We cover Greater London, Hertfordshire and the surrounding areas.
For advice on fixed security grilles London installation, fixed security grilles for windows, fixed security grilles for doors or bespoke security grilles for commercial buildings, contact IKS Locksmiths today.
- phone or WhatsApp on 0203 284 1045 or 07947426981
- email info@ikslocksmiths.co.uk

How can we help you?
For professional security advice and information call to speak directly to Martin, our Master Locksmith and security specialist.
















