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Noise Reduction

Interior windows by Maine Glass block noise from passing train.

Interior windows by Maine Glass block noise from passing train.

Maine Glass has solved a wide variety of noise problems at buildings across the country. Our interior insulating windows are custom designed for each application to maximize noise reduction. Test results have consistently shown Maine Glass to reduce noise levels by 11 – 15dB-eliminating well over half of the exterior noise penetration!

We have a track record of working closely with building staff during the installation. Maine Glass is able to quiet your building without costly downtime or taking rooms ‘out of service’ during the installation process.


Custom Noise Solutions

Interior Insulating Windows by Maine Glass are often specified as a barrier against external noise infiltration. These custom made interior windows have a slim profile designed to blend into the existing window frames. Maine Glass is proud to work with our customers to deliver customized solutions to meet the needs of individual projects.

Insulating Airspace
Generally,a larger airspace will deliver greater noise attenuation. Maine Glass windows are independently installed inside the existing window frame. This design is able to maximize insulation characteristics with greater airspace and dual frame protection.

Perimeter Seal
An airtight perimeter seal that eliminates gaps and leaks is crucial to achieve sound transmission loss. Independent laboratory tests have shown Maine Glass fixed windows to have no air infiltration at window speeds up to 25 mph.

Rigid materials allow noise to vibrate through. All members of the Maine Glass window framework are insulated and cushioned with a double-faced foam tape to dampen vibrations.

Asymmetrical Glazing Thickness
Typical dual pane glass units have two panes with the same glass thickness—these units exhibit a resonant frequency as both panes vibrate together and transmit noise through the window. Whenever possible,Maine Glass alters the glazing thickness to achieve maximum noise reduction.

Laminated Glass
Changing from insulating to laminated insulating glass typically adds 4dB to the noise attenuation of a window system. Laminated glass is offered as an option by Maine Glass for projects that need to maximize noise abatement.

JW Marriott-Chicago,IL

marriot chicago

JW Marriott-Chicago, IL

The J.W. Marriott is one of three architecturally significant buildings on LaSalle Street; the other two are the nearby Federal Reserve Bank and the Chicago Board of Trade building.

“Their architecture is very similar, that group of buildings is very important to preserve. We did a search into the type of glass material and insulation we needed, we had a technical team that investigated the properties of different materials,and the glass we selected was, in our opinion, the one that would do the job best in terms of aesthetics and insulation. We were very pleased with the interior insulating windows.”

Lucien Lagrange – HKS/Lucien Lagrange Studio, Chicago.

Holiday Inn

Holiday Inn Austin: "No More Noise Complaints!"

Holiday Inn Austin: “No More Noise Complaints!”

The Holiday Inn of Austin, Texas was having a difficult time keeping their guestrooms quiet due to the loud noise from the neighboring expressway. Maine Glass was consulted, and eventually supplied 250 Series 2000 Interior Insulating Windows.

The hotel has been very happy with their window installation. According to Larry Bailey, Chief Engineer, “We used to get 20 to 30 noise complaints a week. Now we get none.”

Palomar Hotel

Palomar Hotel: Active neighborhood, quiet guestrooms.

Palomar Hotel: Active neighborhood, quiet guestrooms.

The Hotel Palomar is located in the bustling Union Square neighborhood of San Francisco and needed a way to ensure that their guests would be provided with quiet and comfortable hotel rooms. Maine Glass helped the Hotel Palomar find a solution to the problem of noise by retrofitting 198 rooms with Maine Glass interior insulating windows.

Window solutions provided by Maine Glass have been proven to decrease a hotel’s NC rating from NC40 to NC25. This equates to over a 50% reduction in noise infiltration allowing hotels to provide guests with a quiet nights rest.

Hotel Monaco


Hotel Monaco: Quiet in the heart of New Orleans

When the Kimpton Hotel and Restaurant Group decided to purchase the historic 75-year old Masonic Temple in the New Orleans Business District and renovate it into a classic 250 room Hotel Monaco they knew they had to address many issues. One key issue was the problem of noise infiltration. Comfort and quiet are of primary concern when designing a hotel room. Kimpton also needed a window application that would not compromise the historic appearance of the building.

Maine Glass was awarded the subcontract to retrofit over 250 rooms and suites involving over 550 windows with nearly 30 different room layouts. The Masonic Temple’s original, historic windows were left in place, and The Maine Glass interior insulating windows were installed inside, creating a dual-pane double frame barrier against the elements. Each window was measured and made specific to each opening.

Brice Building Company was the general contractor on this award-winning project. The renovation won the Louisiana Contractor Magazine “Best of the Best, 2001” award, and won a National Merit Award at the ABC “Excellence in Construction Awards”. For the hotel to achieve its four star rating there were several requirements, including construction meeting minimum Sound Transmission Classification (STC) rating. The Maine Glass windows were an integral part in achieving the desired STC rating. Previous testing has shown Maine Glass retrofit windows to successfully reduce a room’s Noise Criterion (NC) rating from NC-40 to NC-25. This is equivalent to over a 50 percent reduction of sound levels.

The Maine Glass interior window solution meets high performance standards, yet typically costs less than half of window replacement. Maine Glass and Maine Glass windows were proud to play an integral part of the final outcome of the New Orleans Hotel Monaco.

The patented Maine Glass window design lends itself to an easy installation and a trouble-free product. As a result, the final product that provides both an aesthetically pleasing structure that retains its historic appeal, while also providing the modern benefits of reduced noise infiltration, superior insulation, reduced heating and cooling costs, and increased comfort.

Maine Glass offers a free “energy evaluation” that will determine the anticipated energy savings after the windows have been installed. For more information on Maine Glass windows, contact Maine Glass at (888)-825-6975.

Hotel Metro

Historic Windows, Insulated against modern noise

Historic Windows, Insulated against modern noise

MILWAUKEE — The Hotel Metro emerged from a $7 million renovation in 1998 as a stunning, upscale boutique hotel in downtown Milwaukee. Located in the heart of the city’s entertainment, cultural, and financial districts, the renovation included upscale amenities, luxurious custom furnishings, and a magnificent lobby and restaurant. Originally built in 1936, the six-story art deco building is a significant structure in Milwaukee. The adaptive re-use of this historic building earned Hotel Metro many awards, including a membership in Historic Hotels of America.

The building’s original handsome hardwood windows were preserved during the renovation. While the windows added to the historic character of the hotel, they also allowed modern noise problems to infiltrate the guestrooms.

Even though they provided complimentary earplugs in the guestrooms, hotel staff routinely received noise complaints from guests. Hotel Metro is in a vibrant neighborhood and the noise from patrons and music at area clubs and bars was waking up hotel guests. In the early morning hours, the loud rattling of dumpsters and garbage trucks on the quaint cobblestone roads was the source of more noise

After reading about a successful noise abatement project completed by Maine Glass at a New Orleans hotel, the owner of Hotel Metro contacted Maine Glass in the fall of 2003. Maine Glass visited the hotel and performed a test installation in two of the Hotel Metro guestrooms. For the test installation Maine Glass used interior sliding windows that were specifically designed to retain operability of the existing windows while creating a dramatic reduction in noise infiltration. After thorough evaluation, Hotel Metro was very pleased with the noise reduction and awarded Maine Glass a contract to supply and install interior insulating windows in all of the street-side guestrooms.

The building’s original historic windows were left in place and Maine Glass interior insulating windows were installed inside, creating an insulating dead air space and a dual pane, double frame barrier. The project delivered numerous benefits including noise reduction, increased energy efficiency, and preservation of the historic windows.

Hotel Metro guests are still treated to a great location in a vibrant neighborhood but now the guests also enjoy a peaceful night’s sleep.

For more information on Interior Insulating Windows and other cost saving windows and window treatments including “Between the Glass” blinds, contact Maine Glass at 888-825-6975.

Hotel Allegro

Interior windows by Maine Glass block noise from passing train.

Interior windows by Maine Glass block noise from passing train.

Built in 1926 in the heart of Chicago’s Loop, the historic Bismark Hotel had been surrounded for over 70 years by the many sounds of the Windy City, the most predominant of which was the elevated train that passed on the building’s West side. When the Bismark was sold and slated for a massive renovation before reopening as the Hotel Allegro in March of 1998, the new hotel operators knew that the issue of noise infiltration had to be addressed.

According to Hotel Allegro general manager, Jan McCormick, replacement double pane windows were considered for the project, but the cost was prohibitive. In addition, all of the windows, even those in rooms located in relatively quiet parts of the hotel, would had to have been replaced to keep a uniform appearance to the exterior of the building.

Instead, Maine Glass interior insulating windows, designed as a cost-effective option to full window replacement, were selected. Maine Glass windows feature double strength glass and a tight seal construction, which reduce noise infiltration by over 55 percent. Custom manufactured and easily installed inside the building’s existing windows, Maine Glass windows also have a low profile, which allowed The Hotel Allegro to keep from altering the historic appearance of the building.

“With the Maine Glass system, we were able to significantly reduce noise infiltration and increase guest comfort without the high price and extensive installation process associated with window replacement,” said McCormick.

Immediately after the Maine Glass windows were installed, they were promptly put to the test, as an important airline client, familiar with the Bismark’s noise problems, wanted assurance that the rooms would be comfortable for its employees. The Hotel Allegro commissioned a test by Acoustic Associates, Ltd. to determine what effect the Maine Glass windows had.

Acoustic Associates sampled the noise level in three rooms on the hotel’s West side (near the train tracks) with a sophisticated sound level meter and digital audio tape recorder. The first room had only the original windows; the second room had been fitted with Maine Glass windows inside the original windows; and the third room had been fitted with Maine Glass windows inside the original windows and had curtains.

The three rooms were rated by the NC rating system, which is used by the American Society of Heating, Refrigeration, and Air-conditioning Engineers (ASHRAE). The recommended rating for rooms within hotels is NC-30 to 35. The lower rating is better, and usually applies to new construction whereas the higher rating is intended for existing buildings. The first room, without a Maine Glass window, had a rating of NC-40. The two rooms with the Maine Glass windows fitted inside the original windows had ratings of NC-25. The curtain appeared to have no substantial effect on the noise rating.

An architect and a regular guest at the Bismark, Lauren McCracken, was so amazed at how quiet the rooms were at the new Hotel Allegro he asked the hotel what was done to reduce the noise. “It was such a simple solution, but it made a world of difference in my stay,” said McCracken.

The Maine Glass window system was indeed a simple solution, according to Ron Sheldon, project manager for the Hotel Allegro renovation. “The Maine Glass windows were installed with virtually no inconvenience or disruption,” said Sheldon. “And because they were installed from the interior without any special equipment or materials, we did not have to be concerned with downtime and cleanup brought on by a window project or the weather.”

Although bids for replacement windows at the Hotel Allegro renovation were over one million dollars, Maine Glass completed the Maine Glass installation for $197,000.

Maine Glass windows are custom manufactured to fit each opening, are available in static or operable models, and can be modified to allow appropriate room for hand cranks or other extensions on the existing window.

Maine Glass windows have been used to solve many problems in addition to noise infiltration. Most commonly, the windows are specified for their ability to eliminate air infiltration and decrease the effect of conduction. The added pane of glass also creates a natural, protected space for the installation of blinds that will never have to be cleaned or repaired as they work to significantly reduce solar heat gain.





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