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Window coverings for wide windows and sliders

By Szeto Handyman · Updated · 4 min read

Quick answer

Wide windows need rods with center supports and brackets fastened into the header. Measure carefully for inside or outside mounts, and use heavier brackets for long spans.

Bedroom with horizontal blinds on a wide window

Mid-century homes in Monterey Park often have wide picture windows and glass sliders, which let in views and also heat.

Inside or outside mount

Inside mounts fit within the window frame. Outside mounts go above and beside the frame and block more light.

Long rods

Long rods need center supports so they do not sag.

Long curtains hung from a rod across a bedroom window

Fastening

Brackets should go into the header above the window, not just drywall.

Sliders

Vertical blinds or curtain panels that slide clear of the door work well.

Heat and glare

West-facing glass walls in Monterey Park hillside homes take strong afternoon sun. Cellular shades, solar shades and lined drapes cut heat and glare while keeping some view.

Living room with wide windows and sheer curtains

Motorized options

Wide or high windows are good candidates for motorized shades. They need power or rechargeable batteries.

Track systems

Ceiling-mounted tracks let drapes glide across very wide openings without center brackets in the way.

Child safety

Cordless blinds and cord cleats keep cords out of reach of children.

Hardware finishes

Black, brass and brushed nickel rods suit mid-century rooms.

Measuring for blinds

Inside-mounted blinds fit within the window frame. Measure the width at the top, middle and bottom, and use the narrowest. Measure height at the left, middle and right.

Outside-mounted blinds hang on the wall or trim, and should extend a few inches past the window on each side to block light. Wide mid-century windows may need two or three blinds side by side.

Wide windows

Long blinds sag in the middle and are heavy to lift. Splitting a wide window into two or three blinds on one headrail or separate headrails keeps them easier to use. Cordless and motorized blinds are safer around children and pets.

Curtain rods

A wide window needs a strong rod with center supports. Mount the rod above the window and extend it past the frame so curtains clear the glass when open. Mounting it higher makes ceilings look taller. On very wide openings, a ceiling-mount track is often cleaner and avoids sag.

Anchoring

Curtain rods and blinds pull on their brackets. Fastening into studs or the header above the window is best. Plaster and older drywall need anchors rated for the load. We find the framing before drilling.

Our steps:

  • Measure and mark bracket locations level
  • Locate framing or choose the right anchors
  • Drill and mount brackets
  • Install the rod or headrail and center supports
  • Hang and test the blinds or curtains

Light and heat control

West- and south-facing windows get strong afternoon sun. Cellular shades, solar shades, and lined curtains help keep rooms cooler. For screens on the same windows, see window screen repair and replacement.

Motorized options

Motorized blinds and shades are worth considering on very wide or hard-to-reach windows. Battery-powered motors are the easiest to install, with rechargeable wands or batteries hidden in the headrail. Hardwired motors need a power source near the window and are best planned when walls are open.

Many work with remote controls, wall switches, and smart home schedules, so shades lower on their own when afternoon sun hits.

Sliding glass doors

Sliding glass doors need window treatments that clear the door path. Vertical blinds are traditional and work on wide openings. Panel track shades, draperies on a long rod, and sliding panels are alternatives with a cleaner look.

Mount the rod or track high and wide so the curtains stack beside the glass, not in front of it.

Safety

Corded blinds pose a strangulation risk to young children. Cordless and motorized options are safest. If you keep corded blinds, use cord cleats mounted high, out of reach. Anchor curtain rods securely, since children sometimes pull on curtains.

Choosing fabrics

Blackout liners help bedrooms and media rooms. Sheer fabrics soften light while keeping views, which suits living rooms. Linen and cotton blends look relaxed.

Lined curtains also help insulate, keeping rooms cooler in summer and warmer on winter nights.

Bay and corner windows

Bay and corner windows need rods that turn corners. Bay window rods with adjustable elbows or flexible tracks follow the angles. Blinds can be installed separately on each window section. Measure each section and the angles before ordering.

Taking down old hardware

Old brackets leave holes. Removing old anchors and patching holes before hanging new hardware gives a clean finish. Plaster may need patching compound and a touch-up of paint.

When to call

Long, heavy rods, motorized shades, high windows and ceiling tracks are good jobs for us. We locate framing, mount solidly and level everything.

Curtain rings and gliders

On long rods, curtains drag if rings are too tight. Larger rings and gliders on tracks slide more easily. A wand attached to the lead ring keeps hands off the fabric.

Planning ahead

Picking treatments before painting means brackets and patches can be done once. If you are also replacing window screens or fixing sliders, plan those visits together.

Valances and cornices

A valance or cornice board across the top of a wide window hides headrails and brackets. It can be fabric, wood, or painted to match the wall.

What our install involves

We measure, mount brackets into framing, hang and adjust blinds and rods. See blind, shade and curtain rod installation.

After hanging blinds near Garfield Avenue, lunch is a bánh mì from Bánh Mì Hòa Phát.

Want us to handle it?

Call or text (626) 684-3505, Mon–Sat, 8:30 AM–7 PM. Send a photo and we will give you an upfront quote.

Call or text (626) 684-3505