Window Insert Measuring Made Easy

Indow window inserts are custom-made and solve all kinds of issues from condensation to noise penetration. Want to know more? Read our answers to frequently asked questions. If you don’t recognize a word, check out our glossary of window insert terms.

 
 

Why Buy Indow Inserts?

Q: Why use Indow inserts over purchasing new windows?

With Indow, no construction is needed to increase insulation and efficiency. Original windows match a home’s character and original design. Original windows often have old-growth wood. This rare, dense wood helps with insulation. Original windows are difficult to replicate without spending a lot of money.

Q: I have old, drafty single pane windows, can Indow inserts help or do I have to buy new windows?

Indow window inserts can help! Adding Indow inserts will boost your current window performance to the equivalence of standard double pane window performance at about 15-20% of the cost.

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Design and Function

Q: How do Indow inserts stay in place?

Indow window inserts are held in place with our patented Compression Tube which expands into the space between the custom cut acrylic panel and the window frame.

Q: How do I remove and re-install Indow inserts? Is this difficult?

Indow inserts remove and install easily. Remove by pulling the D-ring and unhooking the safety chain (if present). Re-install by lining up each corner with the window frame and pressing insert into place. Tip: Put the bottom corners in first to align the Indow, then the top corners. Once corners are in place, gently push the sides in. If the corners of your inserts aren’t sitting flush with the window frame, watch our video on easy corner adjustments.

Q: What colors do Indow inserts come in?

The insert edging (tube) currently comes in white, brown and black. The brown is comparable to Benjamin Moore’s French Press.  For large commercial jobs, custom colors are available in any of the Pantone colors.

Q: Why do you use acrylic over film or glass?

Acrylic is strong, light weight, and insulates very well. Acrylic has superior noise muting properties over film and is a better insulator than glass. Most films appear cloudy and are easily pierced by sharp objects. Glass is heavy and can shatter or chip easily. Indow inserts, made from acrylic sheets, are far easier to handle and store than glass.

Q: Acrylic glazing? I’m concerned with how acrylic will look in my window frame.

Acrylic is highly transparent and allows more light transmission than glass. When Indow inserts are installed, they are almost unnoticeable.

Q: How noticeable are Indow inserts?

Unlike cloudy film glazes and bulky framed interior storm windows, Indow inserts are frameless, composed of highly transparent acrylic glazing and practically disappear from sight when installed into a window frame. This is part of why we use our laser measurement system – because it’s so precise, our compression tubing can have an extremely low profile.

Q: What are the Safety Chains used for?

Safety chains are used in the event of high wind pressure from the outside of leaky exterior windows. Indow inserts create such a tight fit that air pressure can build up and work to push the insert out. They are low-profile ball chains that are hidden in the air pocket between your Indow insert and primary window. During high wind events, some of your Indow inserts might vent air pressure in the corner or along a side. This is normal and you can simply push the corner or side back into place. The safety chains are designed to prevent the Indow from falling completely out of the window frame, which is unlikely to happen.

Q:  What if I want to open any of my windows while Indow inserts are installed?

You can easily remove Indow inserts to open your window and re-install it just as easily. You, depending on what type of window you have, can also use safety chains to have your insert lean part way out and open your window with the insert still installed.

Q: Will the inserts trap condensation?

Thermal window inserts should greatly reduce or entirely eliminate condensation on existing single or double pane windows. The Compression Tube effectively stops warm moist air from reaching the glass. Most people find they can see outside their kitchens for the first time during dinner in winter. There will be times when the acrylic will start to fog up but not nearly as severe as the glass would. If condensation is repeatedly appearing inside the glass or fogging up the acrylic, then there is most likely an existing condition in the wall that should be addressed and remedied.

Q: How do I tell which Indow insert goes into which frame?

We use a small label to mark the backside of the bottom left corner of each Indow insert to denote which window frame the Indow corresponds to. Our numbering system starts on the left immediately entering the house at #1, proceeding from left to right. Each room is also individually denoted.

Q: Is there a piece missing from the corner of my frame?

The backside of our inserts have cut out corners on purpose. The corners are compressed from two sides at once and these cutouts allow the corner to roll back into the frame properly. The exposed side should always face the original window so your insert fits the way it was measured for your window frame.

Q: Can you mount them on the outside?

Indow inserts are made for the interior of your home. You will not receive any benefit from mounting the inserts, nor will they fit, on the outside of your house.

Q:  Do you make Indow inserts for screen doors?

Indow does not currently manufacture inserts for screen doors.

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Benefits and Performance

Q: What type of benefits/savings do Indow inserts provide?

Indow window inserts provide the following benefits:

  • Energy savings equal to a standard double pane windows at 15%-20% of the cost
  • Almost disappear when installed, allowing your home’s own beauty to shine through
  • Preserve existing windows, which match home’s design
  • Window noise reduction of 50 to 70% when placed over single-pane windows
  • Window noise reduction of 33 to 50% when placed over double-pane windows*
  • Easy installation and removal for cleaning or storage
  • Initial installation for most spaces can be done in less than two hours, without construction
  • Saves 20% on energy bills
  • Enhances your home’s resale value, preserving the initial investment
Q: I live in a noisy urban area; will Indow inserts help reduce any of the noise?

Standard Grade Indow inserts will reduce noise coming through single-pane windows by up to 50%, Acoustic Grade inserts dampen sound by up to 70% when placed over single-pane windows. Acoustic Grade inserts reduce noise coming through double-pane windows by 50%.  This is one of the most important benefits for many of our customers! Demonstration

Q: Will Indow inserts add any benefits to double pane windows?

Indow inserts added to your double-pane windows will give you triple-pane performance by boosting efficiency, blocking drafts, and significantly reducing noise. Our Acoustic Grade inserts will reduce the amount of noise coming through double-pane windows by 50%.

Q: Where would you recommend Museum Grade (UV filtering) & Commercial Grade (scratch resistant)?

Many clients order Museum Grade for areas where direct sunlight is a concern to protect furniture, art, carpets or kids from the damaging effects of the sun’s UV rays. Commercial Grade is generally ordered for areas near the kitchen sink where it will be washed or wiped off more often or removed frequently. A pet or child with a sharp object will still be able to damage Commercial Grade Indow inserts.

Q: Will Indow inserts add to my mold problems?

Window mold is generally caused by window condensation. Condensation happens when moist air comes into contact with a colder surface, such as a window. Indow inserts help prevent window condensation through insulating the warm home air from the cold outer windowpane.

Q: Will the inserts trap condensation?

Indow window inserts should greatly reduce or entirely eliminate condensation on existing single or double pane windows. The Compression Tube effectively stops warm moist air from reaching the glass. Most clients find that they can see outside their kitchens for the first time during dinner in the wintertime. There will be times when the acrylic will start to fog up but not nearly as severe as the glass would. If condensation is repeatedly appearing inside the glass or fogging up the acrylic, then there is most likely an existing condition in the wall that should be addressed and remedied.

Q: I’ve had exterior storm windows in the past and wasn’t satisfied with their performance.  Will Indow inserts be able to outperform storm windows?

Exterior storm windows are designed to protect against rain and, sometimes, against strong winds. Indow inserts are designed to insulate windows from cold and heat, reduce sound transmission and provide better thermal and acoustical insulation than traditional storm windows. If you’ve used exterior storm windows in the past, you’ll easily be able to feel/see the difference with Indow inserts.

Q: What is “R Value”?

R-value measures the thermal resistance of walls, windows, and other parts of a building. An Indow insert combined with a single pane window provides 94% of the thermal insulation of a standard double pane window. Look closer

*We want to ensure our inserts help solve your noise problem. Overall noise reduction depends on the amount of noise coming through your walls, ceilings, floors, doors, and existing windows. Noise reduction will be less when placed over double-pane windows. Read our full Noise Reduction Sheet to learn more.

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Durability

Q: How long do Indow inserts last?

Indow inserts have no moving parts, the acrylic will remain transparent, and the silicone tubing is extremely resilient, allowing Indow to offer a limited lifetime warranty. Check out the Indow residential warranty or Indow commercial warranty for more detailed information.

Q: Doesn’t acrylic turn yellow over time?

The acrylic we use to make our inserts does not yellow, crack or discolor from exposure to UV radiation or simple aging.

Q: Doesn’t acrylic scratch very easily?

If not cared for properly, especially with storage and cleaning, acrylic can scratch. Many scratches can be buffed out with an acrylic repair kit. If scratching is a concern, we offer a Commercial Grade Indow that has a durable, scratch resistant coating. In practice, we have had very, very few customers ever express any issues with scratching.

Q: How durable is the edging and will it fade?

The edging is similar to the material used to make silicone oven mitts and cooking spatulas. It was chosen for its durability and it will not fade from exposure to UV or be affected by heat or cold.

Q: Will the acrylic crack?

The acrylic glazing has a high strength to weight ratio and will not crack if handled properly.

Q: Will the inserts warp or bow under high temperatures?

The acrylic is fine up to a normal operating temperature of 160 degrees F. Even under exposure to hot water in environments such as home showers (where temperature goes to 120 F), the inserts will continue to perform without issue.

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Where They Work and Where They Do Not Work

Q: Which types of windows/frames will Indow inserts work with?

Indow inserts can fit in square, rectangular, and other polygonal windows. Even if the window is not perfectly square, our laser measuring allows us to create the exact shape of your window for a precise fit. Custom shapes such as arched windows are also available. Your window frame must have an unobstructed flat edge with a depth of at least 5/8” that runs the entire perimeter of the window.

Q: In what types of windows will Indow inserts NOT work?

Our inserts always mount inside existing windows, so are not appropriate as the primary windows (in screen porches, for example). We also do not install our inserts inside sliding glass doors. We do not recommend Indow inserts for Recreational Vehicles. Due to the flexing of the vehicles when they go over bumps, etc, the inserts might fall out.

Q: What’s the largest window size Indow inserts will work in?

Size restrictions have many variables according to width, height, window function and air leakage. If you have windows larger than the sizes we currently offer (6×8 for Standard, Acoustic, Commercial, & Museum; 4×8 for Privacy & Sleep Panel) please contact us for a free consultation. We may be able to meet your needs by introducing mullions into your large windows.

Q: My windows are not standard size; can I still use Indow inserts?

Yes, each Indow insert is custom made to fit each window. This means our window inserts work for out of square windows and odd-shaped windows.

Q: Will Indow inserts work with curved windows?

Indow inserts can accommodate all sort of special shapes on a flat plane, such as circles, arches, polygons, and more. Indow is not made for curved windows on a radius, such as in a circular tower that need to be installed on a curved plane. If there is room in the sill to install the insert flat, we may still be able to assist. If you are unsure about your situation please contact us for a free consultation.

Q: My windows are out of square.  Will Indow inserts still work?

Indow inserts work very well with out of square windows without any modification to the windows themselves.

Q: Can Indow inserts be installed on doors?

French doors, sliding doors, and other doors are are not appropriate applications for Indow. The frames for the door are usually not ideal for Indow. Also, because of the size and weight, window inserts placed into door openings would not be easily removed for egress. If you have a door opening that is not being used, and have a door frame that provides at least ⅝” of flat surface perpendicular to the door all the way around the perimeter of the door, contact us for a consultation about your space. Some special circumstances may work with the use of mullions.

Q: Will Indow inserts work with my blinds and curtains?

Indow inserts will work with various window treatments if the curtains or blinds are mounted to the face of the window frame rather than to the inside.

Q: Is there any construction required for installing Indow inserts?

Aside from the safety chains, which install with one screw, there are no additional nails, adhesives, or screws involved in the installation and no construction required to the window frame itself.

If you’re still not sure if your window will work with Indow window inserts, the best thing to do is contact one of our Fit Specialists. You submit rough measurements and they can talk through any concerns you have.

 

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Purchasing / How to Order

Q: We love the product! What is the next step?

Ready to order? Next step is to get rough measurements of the window(s) you want inserts for. Provide those a Fit Specialist or dealer (if there’s one in your area) for a free, non-binding estimate. If the estimate looks good, we can help you get started with the process of precisely laser measuring your windows to ensure a custom fit. Our how to order page goes through the whole process.

You can also call us 503-284-2260 or email us at [email protected].

Q: How much do Indow inserts cost?

Cost of your insert depends on the size and shape of your window and the grade type you choose. Pricing for Indow inserts ranges from $27/sf to $36/sf. Some of our premium grades cost $41/sf. If you live near a dealer, they will cover all costs in your estimate, which normally includes a measure and installation fee as well as your local sales tax.

For more information on cost, or to get a free estimate, visit our pricing page.

Q: How long will the whole process take?

Typically it takes 2-4 weeks to install your Indow inserts after we receive your Purchase Agreement. This is not a guarantee and is subject to fluctuation based on current demand.

 

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Upkeep and Care

Q: I see fog or moisture collecting on the inside of Indow inserts, what do I do?

Indow inserts almost always dramatically reduce condensation on the original single (or double) pane windows.   If condensation does occur, it often indicates a problem with moisture build up in the walls.

Q: How do I clean my Indow inserts?

Indow inserts can be easily cleaned with a microfiber cloth with or without a mild soap mixture. See our Care Guide.

Q: Can I repair scratches?

In some cases, it may be possible to lessen the appearance of scratches by using a plastic polish such as Novus 2 or 3 which can be found at most major hardware stores. Be careful to follow the manufacturer’s directions as the incorrect use may damage your Indow insert.

Q: How do I store my Indow inserts?

Many Indow inserts can be left in place year round. If an Indow insert is removed for an extended period, proper storage is essential. We make high quality custom-fitted, clear storage sleeves made from a 5mm nylon-poly blend. If you choose to make your own sleeves be sure to consider the abrasiveness of the material to avoid scratching. The best option is to store them flat on the floor with the largest on the bottom, no more than 3 high to prevent bowing or warping.

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Odors

Q: My new Indow window inserts have a smell? What should I do?

Sometimes Indow window inserts have a “new car smell” that will dissipate. If you find the smell bothersome, you can temporarily store your inserts in a large, well-ventilated room until the odor is gone.

Q: Will Indow hold my inserts for a few weeks so any “new car smell” can dissipate at the factory?

Yes. Indow is happy to hold inserts for several weeks before shipping them. Just make this preference clear during the purchase process.

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Tax Credit Information

Q: Why use Indow inserts over purchasing new windows?

Original windows match the home’s character and are difficult to replace without losing the aesthetic – at least not without considerable expense. Our product provides thermal insulation and increases your homes efficiency without construction.

Q: I have old, drafty single pane windows, can Indow inserts help or do I have to buy new windows?

Indow window inserts can help! Adding Indow inserts will boost your current window performance to the equivalence of standard double pane window performance at about 15-20% of the cost.

 
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bedroom with window with indow inserts installed for soundproofing in san francisco