How to Install Inside Mount Blinds on Vinyl Windows

How to Install Inside Mount Blinds on Vinyl Windows

Vinyl windows are one of the most popular and affordable window options, but they do present some limitation when it comes to hanging blinds. Here’s what you need to know about the pros and cons of vinyl windows and how to install inside mount blinds on vinyl windows.

The Pros and Cons of Vinyl Windows

There are three main types of window frames: vinyl, aluminum, and wood. Vinyl is, by far, the cheapest of the three options—a major contributing factor to their popularity. Vinyl window frames also provide an excellent seal and stand up well to the elements over time, which is why getting vinyl windows is one of the energy-efficient ways to cut costs this summer

You can also further improve the thermal performance of vinyl-framed windows with extra insulation. Because of this durability, vinyl window frames are very low-maintenance and resist extreme heat, moisture, or freezing temperatures.

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However, vinyl window frames do have some drawbacks. For one, they are often a bit clunkier than the frames made of wood or aluminum. They also can’t be painted over, so you’re stuck with the initial color. Finally, vinyl window frames can make it tricky to install inside mount blinds because the vinyl isn’t strong enough to directly support the weight of the blind. 

If you are considering a window replacement and want to inside mount the blinds afterward, it’s important to take careful measurements to ensure everything will fit with the new vinyl windows. (If you’re not sure how, check out our guide that explains how to measure for blinds.)

windows film installation process

Deciding if You Can Inside Mount Blinds on Your Vinyl Windows

First you need to assess your window and how deep it is. If your window is rather deep, you might be able to inside mount the blinds to the existing drywall without having to worry about the window frame or trim. This approach works well with lighter blinds made of materials such as aluminum and vinyl; heavier wooden blinds need to be anchored to a stud or solid wood trim.

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If you don’t have a ledge of drywall that can support your blinds, then it’s time to look at the frame of the window itself. If your house is older and the windows were replaced at some point, the original wood frame might have been left, leaving the new vinyl window simply nesting in the old frame. If the original wood window frame is still in place, you might be able to affix the brackets directly to the wood for an inside mount if you’re tight on space.

You should not screw directly into the frame of the vinyl window. This can compromise the functionality of the window and also void the warranty—not to mention, the vinyl frame isn’t strong enough to hold the weight of the blinds. Instead, you should attach the brackets to the top and sides of the inside opening; make sure the bottom of the blinds won’t bang into the vinyl finger-hold at the bottom of the window when fully extended.

Sunlight coming through venetian blinds

How to Install Inside Mount Blinds on Vinyl Windows

If you have determined you have enough room to inside mount blinds on your vinyl windows, follow these steps to hang them up.

  • Unpack the blinds and get the mounting brackets. Position them so they are flush and level with the window frame, and then mark the screw holes using a pencil. If your blinds include a valance, be sure to make an allowance for that, as well, before marking the screw holes.

  • Attach first one bracket and then the other to the wall using a drill or screwdriver. If using a screwdriver, create pilot holes first by tapping a nail with a hammer and then removing the nail. Make sure the brackets are aligned, and then tighten the screws.

  • If the window needs additional support brackets, determine their placement using a tape measure and a leveler, mark the screw holes with a pencil, and mount them using the same steps outlined above. Keep in mind, “center” support brackets will actually need to be placed off to the side to avoid interfering with the mechanisms at the top.

  • Attach the valance clips to the front of the budget blinds before mounting them. Make sure the clips do not interfere with any mechanisms at the top.

  • Set the headrail into the brackets. Close the end brackets and make sure they have snapped securely in place.

  • Finish assembling the valance by attached the small side pieces to the main front piece. Snap the valance into the clips; first the top, then the bottom.

  • Test your new blinds to make sure they work, and enjoy!

If you’re in the market for new blinds to go with your new vinyl windows, be sure to check out our collections of cordless shades.

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