Indow Acoustic Grade Window Inserts review

For street noise, the window is usually the weakest part of an apartment, and Indow's inserts are the most complete fix a renter can install. Each insert is cut to your window from laser measurements and edged with Snug Fit compression tubing, so it presses into the existing frame and forms a near airtight seal without screws or changes to the window. Indow states noise reduction of up to 70% and also sells the inserts as a draft and energy fix, citing average energy savings of 20%. Inserts are handcrafted in Portland, Oregon, and covered by a Lifetime Warranty. The catch is price and lead time. The acoustic insert lists at $44 per square foot MSRP, so a 3 by 5 foot window works out to about $660 before any discounts, and you must measure and wait for a custom build. If one bedroom window is the main problem, it is the product most likely to make a real difference.

Who it is for

Apartment dwellers whose bedroom or living room faces a busy street and who cannot replace the windows.

Price

Acoustic inserts listed at $44 per square foot MSRP; get an estimate for your windows.

INDOW ACOUSTIC INSERT: $44/sf MSRP
Quoted from the vendor pricing page on November 8, 2026.

Key features

• Custom made from laser measurements of each window
• Snug Fit compression tubing seals the insert inside the existing frame
• Indow states noise reduction of up to 70%
• No tools or frame modifications needed to install or remove
• Handcrafted in Portland, Oregon, with a Lifetime Warranty and Snug Fit Guarantee

Strengths and weaknesses

• Strength: Strongest documented noise reduction for windows on this list
• Strength: Presses in and comes out, so it suits renters who may move
• Strength: Also cuts drafts, with Indow citing average energy savings of 20%
• Weakness: Priced by area, so a large window costs hundreds of dollars
• Weakness: Requires measuring and a custom order before delivery
• Weakness: Treats windows only, not walls or doors

Key facts

• Price: $44 per sq ft MSRP
• Noise reduction: Up to 70% (Indow claim)
• Install: Press-fit, no tools
• Warranty: Lifetime Warranty

Where it ranks

Indow Acoustic Grade Window Inserts is No. 2 in our Best Soundproofing Products verdict.