Inside vs Outside Mount Shutters: Pros and Cons
Last Updated: October 25, 2026
Quick Summary
Inside vs outside mount shutters each solve different problems: inside mounts require at least 100-150mm of window recess depth and create a clean, built-in look, while outside mounts work for shallow openings and can hide frame imperfections but extend further into the room.
Inside mounts need a minimum of 100-150mm recess depth to fit properly without protruding into the room.
Outside mounts work on any recess depth and conceal older, warped, or imperfect window frames.
Window handles and controls can interfere with inside mounts if they project 40-50mm from the frame.
Inside mounts demand precise measurements with tight tolerances, while outside mounts are more forgiving with 5-10mm variations.
Inside mounts create a tailored, architectural look integrated with the window frame, while outside mounts make a bolder visual statement.
Table of Contents
Inside vs Outside Mount Shutters: Quick Comparison
Window Recess Depth for Shutters: Which Mount Works Best
Shutter Clearance for Window Handles and Controls
How to Measure Windows for Shutters Accurately
Shutters for Shallow Window Recesses: Inside or Outside
Aesthetic and Functional Differences Between Mount Types
Getting Your Made-to-Measure Shutters Fitted
Frequently Asked Questions
Inside vs Outside Mount Shutters: Quick Comparison
The choice between inside and outside mount shutters comes down to your window depth, frame condition, and the look you want. At Caledonia Shutters, we've fitted thousands of windows across Scotland, and we've learned that inside vs outside mount shutters each solve different problems. Inside mounts give a built-in, seamless appearance when your window recess is deep enough. Outside mounts work for shallow openings and can hide frame imperfections. Here's what you need to know to choose the right one for your home.
Mounting Type | Best For | Key Advantage | Main Limitation |
Inside Mount | Deep recesses, modern windows | Clean, built-in look | Requires sufficient depth and sound frame |
Outside Mount | Shallow openings, older frames | Works with most windows, hides flaws | More visible on wall, takes up space |
Window Recess Depth for Shutters: Which Mount Works Best
Your window recess depth is the single most important factor. Inside mounts sit within the window opening, so they need at least 100-150mm of depth to fit properly without protruding into the room. If your recess is shallower than this, an outside mount becomes your practical choice.
Outside mounts attach to the wall or trim around the window, so depth doesn't matter. They work equally well on Victorian terraces in Glasgow with shallow recesses as they do on modern properties. The trade-off is visibility: an outside mount extends further into the room and is more noticeable on your wall.
The frame condition also matters. If your window frame is square and structurally sound, inside mounting looks crisp. Older properties sometimes have frames that aren't perfectly square or have warped trim, outside mounting conceals these imperfections and gives you a cleaner final result.
Shutter Clearance for Window Handles and Controls
Window handles, locks, and controls create a practical constraint you can't ignore. Inside mounts need clearance around these mechanisms, or your shutters won't open fully. If your window handle sticks out 40-50mm from the frame, an inside mount might interfere with louvres or frames when you operate the window.
Outside mounts sidestep this problem entirely. Since they sit outside the recess, there's no conflict with internal handles or mechanisms. You can open and close your windows freely without any obstruction.
This becomes especially relevant in older Scottish properties where handles are often larger or positioned differently than modern windows. When you're measuring for shutters, note exactly where your handle sits and how far it projects. This detail often determines whether inside mounting is viable for your specific window.
How to Measure Windows for Shutters Accurately
Measuring correctly prevents costly mistakes. For detailed guidance on the full measurement process, see our guide on how to measure windows for shutters accurately, which walks through every dimension you'll need. For inside mounts, you measure the width and height of the opening itself, the actual recess dimensions. This measurement must be precise because the shutters need to fit snugly within that space.
[INTERNAL_LINK_PLACEHOLDER: For detailed guidance on the full measurement process, see our guide on how to measure windows for shutters accurately, which walks through every dimension you'll need.]
Outside mounts are more forgiving. You measure the wall area where the shutters will sit, so slight measurement variations don't cause the same problems. If you're off by 5-10mm on an outside mount, it's rarely noticeable. Inside mounts demand tighter tolerances.
Many homeowners worry about getting measurements wrong. The good news is that professional fitters like Caledonia Shutters handle the final verification on-site. We take our own measurements during the fitting appointment, so any small discrepancies you make at home don't derail the project. That said, accurate initial measurements speed up the process and give you confidence before we arrive.
Shutters for Shallow Window Recesses: Inside or Outside
If your recess is genuinely shallow, under 100mm, inside mounting isn't practical. If you have awkward window shapes or shallow recesses, our guide on measuring awkward window shapes covers specific strategies for these tricky situations. Outside mounting becomes your only sensible option. This is especially common in Glasgow's older tenement properties, where windows were often set nearly flush with the external wall.
[INTERNAL_LINK_PLACEHOLDER: If you have awkward window shapes or shallow recesses, our guide on measuring awkward window shapes covers specific strategies for these tricky situations.]
Shallow recesses don't mean you can't have beautiful shutters. Outside mounts look professional and elegant when fitted properly. They also give you more control over light and privacy because they cover the full external wall area around the window, not just the recess itself.
The only real downside to outside mounting in shallow recesses is that they project further into your room. In small spaces or rooms with limited wall space, this can feel intrusive. But functionally, they perform just as well as inside mounts.
Aesthetic and Functional Differences Between Mount Types
Inside mounts create a tailored, architectural look. They sit neatly within the window frame, almost like the shutters are built into your home. This aesthetic suits period properties and modern minimalist interiors equally well. The shutters become part of the window itself rather than a separate fixture on the wall.
Outside mounts create a bolder statement. They frame the window more dramatically and can actually enhance the proportions of a room. In properties with high ceilings or large windows, outside mounts add visual interest and weight to the wall.
Functionally, both control light and privacy equally well. The real difference is how much of your wall they occupy and how they integrate with your window frame. Inside mounts are tidy and space-efficient. Outside mounts are more visible but more versatile for different window types and depths.
In terms of maintenance and operation, there's minimal difference. Both styles use the same louvre mechanisms and hardware. Cleaning is equally straightforward with either mount type.
Getting Your Made-to-Measure Shutters Fitted
Once you've decided on your mount type, the fitting process is straightforward. Caledonia Shutters handles everything in-house, from design to installation. We measure your windows accurately on-site, manufacture your shutters to exact specifications, and install them with our expert fitting teams.
Our fastest lead times in Scotland mean your shutters are ready and installed quickly, not weeks away like other companies quote. We work across all of Scotland, from Glasgow city centre to the remote Highlands and Islands, so location doesn't slow us down.
[INTERNAL_LINK_PLACEHOLDER: Browse our Premium Plantation Shutters range and explore options tailored to your home.]
[INTERNAL_LINK_PLACEHOLDER: Ready to move forward? Request a quote or book a fitting service with our team.]
The decision between inside and outside mount shutters isn't complicated once you measure your recess and check your window handles. Most homes suit one option more naturally than the other. If you're unsure, our team can advise during a free consultation, we'll look at your specific windows and recommend the mount type that gives you the best result. Request a quote or book a fitting service to get started with our team. Get started with Caledonia Shutters and transform your windows into beautiful, functional focal points that work perfectly for your home.
Many Scottish homeowners delay upgrading their windows because they assume it's complicated or expensive. Made-to-measure shutters solve both problems. Caledonia Shutters delivers beautiful, precision-fitted shutters with fair transparent pricing, efficient installation, and expert in-house teams who know every property type across Scotland. [INTERNAL_LINK_PLACEHOLDER: Request a quote from Caledonia Shutters] and see how quickly we can transform your home with shutters designed exactly for your windows.
Frequently Asked Questions
What is the difference between inside-mount and outside-mount shutters?
Inside-mount shutters fit within the window recess, sitting flush with the wall and creating a built-in appearance. Outside-mount shutters attach to the wall or trim around the window frame, sitting proud of the opening. Inside mounts suit deep, square recesses; outside mounts work for shallow openings or when you want to hide frame imperfections. Caledonia Shutters measures your windows precisely to determine which mount delivers the best fit and aesthetic for your home.
Can shutters be fitted inside a shallow window recess?
Shallow recesses typically require outside mounting because inside-mounted shutters need sufficient depth to operate smoothly and sit properly within the frame. Most windows need at least 100-150mm of depth for comfortable inside mounting. If your recess is shallower, outside mounting is the practical choice, it sits on the wall or trim and avoids clearance problems. Caledonia Shutters assesses your recess depth during the design phase to recommend the right solution for your space.
How much clearance do shutters need around window handles?
Inside-mounted shutters must clear existing handles, locks, and controls by at least 20-30mm to open and close freely without obstruction. If your window has protruding handles, inside mounting may not be viable unless handles can be repositioned. Outside mounting avoids this issue entirely because the shutters sit outside the recess. During measurement, Caledonia Shutters checks handle placement and advises whether inside mounting works or if outside mounting is the better choice.
How do I know which mount will actually fit my windows?
The key factors are recess depth, window shape, handle clearance, and frame condition. Inside mounting suits square, deep recesses with no obstructions; outside mounting works for shallow openings, irregular shapes, or damaged frames. Accurate measurement is essential, measure the recess width, height, and depth, and note handle positions. Caledonia Shutters provides a free design consultation where our team assesses your windows and recommends the mount that delivers the best appearance and function for your home.
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