Internal aluminium Security Shutters provide a physical barrier for sash and bay windows while preserving a clean, shuttered appearance from the street. From inside, the panels lock with a patented Italian double‑key mechanism into aluminium frames.
Installed by skilled carpenters and built from architectural‑grade aluminium, they offer light control, privacy and secure night ventilation, with a 10‑year guarantee and local support across London and the South‑East.
Internal aluminium shutters sit inside the reveal, so the street view reads as a neat shutter finish rather than a commercial grille. Rigid aluminium frames, discreet hardware and patented double‑key locks deliver real resistance while preserving kerb appeal. You get privacy and daylight control, and the elevation looks cleaner than with external bars or rollers.
Get started: Book an appointment for a free home survey, or learn more about our range.
Security Shutters give period sash and modern bays real protection without bars or exterior grilles. Panels sit inside the reveal, so the street view stays clean. Aluminium frames, patented double‑key locks and solid fixings create a rigid barrier that works day to day. You can control light and maintain privacy, with secure night ventilation.
Sash openings need accurate templating and the right frame choice. We survey each reveal, check the sill, and plan fixings into solid substrates for a rigid install. You get the crisp, classic shutter look inside, and the street view stays tidy outside. We’ll guide you on louvre sizes and stile/rail proportions so the shutters complement original joinery.
On older box frames we offset the hinge slightly to clear the parting bead and keep the swing smooth.
Angles, out‑of‑square corners and varying sill depths can make bays tricky. We handle that with templates, precise mitres and correct panel sequencing so the shutters fold and lock cleanly. The result is a bay that keeps its view, lets you control light, and adds a serious security layer without bulky exterior hardware. We template angles first so mitres meet tight and stay quiet when you open and close panels.
See style options for bays: Bay window shutters.
A short home survey answers layout, fixings and finish choices for your sash or bay, and then we quote accurately. Book an appointment.
A patented Italian double‑key lock engages the frame. Heavy‑duty hinges support larger spans. Solid fixings anchor the frame into suitable substrates. We specify placement and count for each opening so it resists force and moves smoothly. The result is a rigid, quiet barrier you can rely on.
Patented Italian locks. These shutters use a double‑key turn mechanism for positive engagement into the frame. The lock body and keeps are engineered for strength, and we position them for both resistance and everyday convenience.
Reinforced hinges. Heavy‑duty hinges resist prying and support the mass of aluminium panels in larger spans. We specify hinge count and placement by opening size to keep motion smooth.
Anchored frames. We install through solid substrates wherever possible and use appropriate fixings for lintels and sills. Correct anchoring is what makes a shutter feel solid and stay quiet. We tighten fixings into brick or block where possible to minimise movement over time. The lock and the fixings do the work; the paint simply helps it disappear.
With the window open and shutters locked, you maintain airflow behind a protective barrier. This supports night‑cooling strategies common under Part O while avoiding the visual impact of exterior grilles. We’ll confirm the right configuration, so you keep comfort, security and the look you want.
Internal installs typically don’t need planning consent; external grilles or rollers often do. Every property differs and listed and conservation homes need extra care. We’ll check your local authority context first, so you stay compliant without compromising on security or look.
Choose colours that blend with architraves for a discreet look, or contrast to frame the window. We colour‑match the hardware, so the installation looks like one piece. Narrow louvres favour privacy and period detail; wider louvres open views on rear elevations. We match profiles and finishes across rooms so everything ties together.
See material and colour options in Our Ranges and room‑by‑room ideas in Rooms.
Consistency across rooms. If you already have shutters elsewhere, we’ll match profiles and finishes so the new installation integrates with the rest of the home.
Surveyors measure reveals, identify fixings and plan lock/hinge positions. Carpenters scribe, set and test for quiet, smooth operation. You get a tidy result with a 10‑year guarantee and local aftercare, plus clear guidance on use and simple upkeep.
Ready to take the next step? Book an appointment and we’ll talk you through options for your sash or bay.
Internal aluminium shutters are priced by window size, configuration (sash or bay), finish and hardware. A quick home survey confirms the layout and fixings, then we quote accurately with no guesswork. Book an appointment to get a tailored plan and price for your home.
Every installation is bespoke. These factors guide pricing:
A short home survey gives an accurate quote and a solid plan for installation.
External grilles add visible deterrence but can change the elevation and may need consent. Internal shutters keep the protection inside the frame, so kerb appeal and day‑to‑day use stay intact. We recommend the best approach for each elevation and door set so you balance aesthetics, compliance and security.
One of our surveyors with a carpentry background visits, measures and talks through lock placement, hinge count and finishes. We’ll agree the plan together, then set a clear installation date.
Book an appointment for your survey. Prefer to browse styles first? See bay window shutters or explore our Security Shutters.
