How to Block Side Light on Blackout Curtains
Why Side Light Leaks Happen
Blackout fabric can still underperform if the curtain setup is too narrow or sits too far from the wall.
- • Narrow panels leave exposed glass at the edges.
- • A rod with too little return keeps the fabric away from the wall.
- • Mounting too close to the frame creates visible side gaps.
- • Lightweight fabrics can drift open more easily in active rooms.
Build a Better Blackout Setup
The best side-light control comes from the right combination of width, drape weight, and hardware.
- Choose fuller panels that extend beyond the window width.
- Use a French return-style rod or track setup to bring fabric closer to the wall.
- Mount higher and wider for better edge coverage.
- Pick a heavier blackout fabric for a more stable drape.
- Use the hooks to attach the return part of the curtains to the wall.
Best Curtarra Options for Reducing Side Light
Max Bespoke French Return Curtain Pole
- ✓ Return-style coverage
- ✓ Cleaner side closure
- ✓ Pairs with blackout drapery
From $178.00
Gary Linen Look 100% Blackout Roman Blinds
- ✓ Double-Sided Linen Texture
- ✓ Custom Sizing Available
- ✓ Motorized & Cordless Options
- ✓ Safe for Kids & Pets
- ✓ 11 Sophisticated Colors
From $79.20
Gary Linen Look 100% Blackout Curtains
- ✓ 100% Blackout Performance
- ✓ Double-Sided Linen Texture
- ✓ Custom Sizing for Large Windows
- ✓ Premium 270 GSM Fabric
- ✓ No Fuss Folds
From $75.14
Gary Linen Look 100% Blackout No Drill Roman Blinds
- ✓ No Drill Installation
- ✓ Double-Sided Linen Texture
- ✓ Custom Sizing Available
- ✓ Easy Operation & Maintenance
- ✓ 10 Sophisticated Colors
From $120.96
4 Steps to Reduce Side Light
Quick Side-Light Checklist
-
Close to the ceiling
Place the rod as close to the ceiling as possible to reduce the amount of light coming through the gap at the top; or install a blackout valance to cover it.
-
Check panel coverage
Make sure your curtains extend beyond both sides 6-10 inches beyond the frame instead of ending at the glass edge.
-
Review your hardware
A return-style rod or a track setup can help bring fabric closer to the wall.
-
Improve fullness
Wider custom panels usually create a fuller, more stable drape that helps reduce visible edge gaps.
Real Rooms, Better Darkness
Why Curtarra Works Better for Light Control Problems
Custom Width That Fits the Window
Better Hardware Pairing
Frequently Asked Questions
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