Inside vs Outside Mount Blinds: How to Decide

Before you order blinds, you need to decide where they will sit: inside the window recess, or outside it on the wall above. This decides the size you order, so it is worth getting right.

Quick answer: Inside mount blinds sit within the window recess for a neat built-in look but need enough depth and leave small side gaps. Outside mount blinds are fixed above the window and overlap the frame, blocking more light, so they suit bedrooms.

Inside mount

The blind sits inside the window opening, with brackets fixed to the top of the recess.

• Clean, built-in look
• Shows off the window frame
• Takes up no wall space

You need enough depth. Most roller blinds need at least 50 mm of flat depth, and wooden blinds need more. Window handles that stick out can block the blind. Inside mount also leaves small light gaps at each side.

Outside mount

The blind is fixed to the wall or ceiling above the window and overlaps the opening.

• Blocks more light, which is better for bedrooms
• Makes small windows look bigger
• Works when the recess is shallow or uneven
• Clears handles and frames

Add 50 to 100 mm on each side of the opening so the blind covers the frame fully.

How to measure for each

• Inside: measure the width at top, middle and bottom, and use the smallest. The blind is made slightly narrower to fit.
• Outside: measure the opening and add the overlap. Measure the drop from where the bracket will sit to just below the sill.

Which is better for Dubai?

For bedrooms facing the afternoon sun, outside mount blackout blinds give the darkest result. For kitchens, bathrooms and offices, inside mount looks neater. If you want inside mount and full darkness, add side channels.

Not sure which blind type? See roller vs zebra vs wooden blinds or the best blinds for Dubai heat.

Frequently asked questions

How deep does a recess need to be for inside mount?

Most roller blinds need at least 50 mm of flat depth. Wooden and Venetian blinds need more.

How much overlap for outside mount blinds?

Add 50 to 100 mm on each side of the window opening, and fix the brackets 50 to 100 mm above it.

Can I add side channels to stop light gaps?

Yes. Side channels on inside mount blackout blinds close the gaps and give near total darkness.

Related guides

• Roller vs Zebra vs Wooden Blinds: Which Suits Your Dubai Home?
• The Best Blinds for Dubai Heat and Strong Sun