What is the minimum depth for inside mount blinds?

Minimum depth varies by product: Mini blinds need 1.5", cellular shades need 1.75", wood blinds need 2.5", and roman shades need 3". Check specific product pages for exact requirements.

Which mount is better for bedrooms?

Outside mount is generally better for bedrooms because it provides superior light blocking by covering the entire window opening and eliminating light gaps on the sides. This is especially important for blackout needs.

Do I need to add overlap for outside mount?

Yes, for optimal light blocking and privacy, add 3-4 inches to each side of the window opening and 3-4 inches above. Measure to where you want the bottom to fall (windowsill or below).

Can I install inside mount blinds in a shallow window?

If your window frame depth is less than the product's minimum requirement, you have two options: choose outside mount instead, or select a different product type with shallower depth requirements like mini blinds or certain roller shades.

Which mount option costs less?

Inside mount typically costs less because it requires smaller blinds that fit within your window frame. Outside mount blinds need to be larger to overlap the window opening, using more material.

Inside Mount vs Outside Mount

Learn the differences between inside and outside mounting to choose the best option for your windows and style preferences.

Written by Mike Chen, Lead Window Consultant|Last updated: January 2024|5 min read

Inside Mount

Inside mount places the blinds or shades within the window frame opening, creating a clean, built-in appearance.

Advantages

• Clean, streamlined appearance
• Shows off decorative window trim
• Doesn't protrude into the room
• Less material needed (lower cost)
• Professional, built-in look

Considerations

• Requires minimum depth (varies by product)
• Small light gaps on sides
• Window frame must be square
• May conflict with window handles/cranks

Outside Mount

Outside mount attaches the blinds or shades to the wall or window trim above and around the window opening.

Advantages

• Better light blocking (covers gaps)
• Makes windows appear larger
• Works with any window depth
• Hides unattractive window frames
• Works around obstructions

Considerations

• Protrudes from wall/window
• May cover window trim
• More material needed (higher cost)
• Requires wall anchors for heavy blinds

When to Choose Each Option

Scenario	Recommendation
You have beautiful window trim to showcase	Inside Mount
Maximum light blocking is needed (bedrooms)	Outside Mount
Window frame depth is less than 2 inches	Outside Mount
You want a clean, modern look	Inside Mount
Window has cranks, handles, or locks in the way	Outside Mount
You want to make small windows look larger	Outside Mount
Window frame is perfectly square and flat	Inside Mount
Wall space above window is limited	Inside Mount

Minimum Depth for Inside Mount

If you're considering inside mount, make sure your window frame has sufficient depth. Here are typical requirements:

1.5"

Mini Blinds

2.5"

Wood Blinds

1.75"

Cellular Shades

Roman Shades

* These are typical requirements. Check specific product pages for exact depth requirements.

Measuring Tips by Mount Type

Inside Mount Measuring

1. Measure width at top, middle, and bottom - use smallest
2. Measure height at left, center, and right - use smallest
3. Measure depth to ensure product fits
4. Do NOT make any deductions - we handle that

Outside Mount Measuring

1. Add 3-4" to each side for light block
2. Add 3-4" above the window opening
3. Measure to windowsill or below for full coverage
4. Provide exact size you want - we make it to order

Need Help Deciding?

Our experts can help you determine the best mounting option for your windows and guide you through the measuring process.

View Measuring Guide Free Consultation