Inside Mount vs. Outside Mount Guide

Understand which mounting style fits your window and situation before you buy.

Inside mount and outside mount can sound confusing at first. The main idea is simple: inside mount fits within the opening; outside mount covers around it.

What inside mount means

✓The blind or shade mounts inside the window frame opening.
✓It creates a cleaner, built-in look — hardware is mostly hidden.
✓The window frame must have enough depth for the product to fit.
✓Products typically require 1.5 to 3 inches of depth — check product specs.
✓Measurement tolerance matters more — exact sizing is critical for inside mount.
✓Handles, cranks, or locks inside the frame may block clearance.

What outside mount means

→The blind or shade mounts on the wall above and/or around the window frame.
→Hardware is visible on the wall surface outside the frame.
→Can cover light gaps that would show with inside mount.
→Useful when window depth is too shallow for inside mount.
→Often makes a window look larger by extending beyond the frame.
→Gives flexibility to add extra coverage width and height.

Which one fits your situation?

Situation	Better choice	Why
Want a clean built-in look	Inside mount	Sits within the frame, hides hardware
Need more light blocking	Outside mount	Overlaps frame edges to reduce gaps
Window depth is shallow (<1.5")	Outside mount	Inside mount needs minimum depth
Window frame is uneven or damaged	Outside mount	Covers imperfections
Want curtains layered over blinds	Outside mount	Curtain rod installs separately above
Renting / prefer fewer holes	Outside mount (one spot)	One set of brackets above frame vs. inside frame
Want to show off decorative frame	Inside mount	Frame stays visible around the treatment
Wide valance or decorative header wanted	Outside mount	More surface area for decorative hardware

Common mistakes to avoid

✗Measuring only once — windows are often not perfectly square.
✗Forgetting to check the depth — inside mount requires enough space.
✗Not accounting for handles, cranks, or locks inside the frame.
✗Assuming all blinds and shades measure the same way — they do not.
✗Not reading the product's specific measuring instructions.
✗Forgetting to plan for child cord safety.

Simple decision reminder

•If you are unsure, take measurements and photos before shopping.
•Bring printed or written measurements to the store.
•Ask the product seller how they want measurements submitted — inside and outside mount use different measuring methods.
•Measure twice. Order once.

Inside / Outside Mount Decision Checklist

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Measured window frame depth before deciding inside vs. outside mount

Confirmed product requires at least the available depth for inside mount

Checked that window frame is level, intact, and undamaged

Noted whether window has handles, cranks, or locks that need clearance

Decided mount type: inside (within frame) or outside (above and around frame)

Read product instructions for required measurements for chosen mount type

Confirmed wall material and hardware type needed for chosen mount

Considered child cord safety for chosen product style

Confirmed plan for curtain layering if adding curtains over blinds

Brought or written down measurements before shopping

Asked the product seller how they want measurements submitted

Confirmed safe installation help for high, heavy, or uncertain installations

This guide is general planning only. Product instructions vary. Verify mounting hardware, wall and frame condition, child cord safety, and ladder safety before installing.

Need to record your window measurements?

Open Window Measurement Helper →