Frequently Asked Questions About Window Films

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Q: What does 'Yachad' mean?

A: "Yachad" (yuh COD) is the Hebrew word for "unity". We use Yachad as our company name because it reflects our desire to work together as a unit, each person having the same goals and high standards.

Yachad Window Films, along with four other businesses, is a part of Yachad Industries, and we work hard to ensure that all of our businesses are run precisely in the same way, focusing on performing the highest quality work possible and treating our customers to the best customer service. We put very high demands on ourselves, because our goal is that your experience with all of our companies would be identical, and because of this we have built a strong reputation of offering the best quality services in our trades.

Q: Can window films be removed?

A: Window films are considered permanent, but all films can be removed either through a process of steaming or mechanical abrasion such as scraping with a razor. Any tint installation company or competent window washing service can do this removal. Yachad Window Films also offers window film removal services.

Q: Will the installation of window film prevent fading of my interior furnishings?

A: Solar control window films can significantly reduce fading of interior furnishings...However; no window film or glazing product can totally prevent or stop fading. (link to causes of fading page)

Q: How much heat will the window film block?

A: This varies, dependant upon which film you choose. Each film is tested and rated to determine the Total Solar Energy Rejection (TSER) that it provides. TSER figures indicate the film's ability to reject solar heat in the form of visible light and invisible infrared radiation. The highest TSER ratings are in the 80-82% range.

Q: Will window film made my home/office dark inside?

A: Window films reject varying amounts of visible light, depending upon which film you choose. Each film is tested and rated for Visible Light Transmission (VLT), which is expressed as a percentage. Solar control window films are available with VLT's ranging from 70% to 5%. Technological advances in the industry have produced "spectrally selective" films which achieve astonishing heat rejection combined with high VLT...So you no longer have to have a "dark" film in order to achieve significant heat rejection.

Q: Can I utilize window film for privacy...to prevent someone from seeing in through my windows?

A: Yes...to a degree. This depends totally upon the position and intensity of available light sources on either side (inside vs. outside) of the film. Conventional metalized solar control films will reflect the greatest source of available light. During the daytime, the sun typically produces sufficient light to contrast dramatically with indoor light sources...so dark and/or reflective films will provide a substantial amount of daytime privacy. However, at night, if interior lights are left on, the effect from these same films is reversed...someone outside can now see in, and someone inside will have difficulty seeing out.

We also offer films that obscure the view in both directions, yet allow muted light to pass through, that are well-suited to provide both day and nighttime privacy

Q: How long will the window film last?

A: The effective life of window films varies according to the type of film, location, amount of solar exposure and environmental conditions unique to the specific application. There are documented applications were window films have lasted for over 20 years.

Q: Is there any type of warranty on the film?

A: Yes. All of the window films that we offer are backed my the respective manufacturer's specific warranties, which vary by product and application.

Q: What is the warranty coverage period?

A: Residential applications typically feature a limited lifetime warranty for vertical glass applications that is in effect for as long as the original purchaser owns the home. Huper Optik also offers an optional Transferable warranty at a moderate extra cost.

Commercial limited warranties for vertical glass applications range from 5-15 years.

Q: What does the warranty cover?

A: Coverage is worded differently by each manufacturer, but typically the film is warranted against fading, bubbling, peeling, cracking, crazing, de-lamination, de-metalization, excessive change in appearance and adhesive failure. They typically include insulated glass (I.G.) unit seal failure and glass breakage coverage. You should examine the manufacturer's warranty for specific coverage details. Copies are available from Yachad Window Films upon request.

Q: What is NOT covered by the warranty?

A: Non-vertical applications (i.e. skylights, angled greenhouse walls, ceilings, etc.) are typically NOT covered by film manufacturer's warranties, due largely to the dramatically increased solar exposure experienced.

Pre-existing conditions, such as a history of I.G. unit seal failure or glass breakage may preclude coverage in those specific areas.

Certain glazing systems and extremely large windows (single pane over 100 sq.ft., or double-pane over 40 sq.ft.) or any triple-glazed windows, bullet-resistant glass, wire-reinforced glass, etc., are exempted—especially from glass breakage coverage. Restrictions to film applications on Low-E windows typically exist. You should examine the manufacturer's warranty for specific coverage details.

Q: What is a Low-E window and why are window film applications restricted on them?

A: The "E" refers to the emissivity of the window unit - It's ability to absorb heat and reflect it back into the room. The lower the emissivity, the less room heat is absorbed - thus more heat is reflected back into the room. This effectively creates a "heat trap". The primary job of a Low-E window is to reduce heat loss and not heat gain.

Depending upon the type and location of any Low-E coating, restrictions or even prohibitions against installation of certain window films may exist. The wrong film applied to a Low-E glazing system could lead to premature failure of the I.G. unit or possibly even glass breakage. We have testing equipment to determine the presence of Low-E coatings and the various film manufacturers have application guidelines to which we strictly adhere, to prevent problems arising from a window film installation.

Q: Can window film cause my glass to break?

A: Not if properly selected for the specific application. The window film manufacturers all have recommended film-to-glass application guidelines, to which we strictly adhere. Glass breaks when it is over-stressed. There are several types of stress that affect window glass and can cause glass breakage:

  • Thermal stress - from excessive solar heat absorption
  • Tensile stress - from the weight of the glass itself
  • Mechanical Flexing stress - from wind-loading
  • Impact stress - from objects hitting the glass (i.e. baseball, wind-blown debris, forced entry)
  • Twisting stress - from structural movement or settling of the building or window frame

Thermal stress is the only type that window film can contribute to, and any film will increase to some degree, the stress on sunlit glass. Here is where the window film manufacturers, in conjunction with the IWFA, have determined safe film-to-glass application guidelines. We respect and adhere to these guidelines.

There are other factors which contribute to increased thermal stress, such as: partial shading, or signs or decals on windows (causing the glass to heat unevenly), tight-fitting window treatments (which trap and concentrate heat) and even heating or cooling ducts directed at the window. These factors are analyzed, evaluated and addressed on a specific application basis.

Q: Are there applications where solar control window film should not we installed?

A: Generally, solar control window films are not recommended for:

  • Single pane glass larger than 100 square feet
  • Double pane glass larger than 40 square feet
  • Triple pane windows
  • Clear glass thicker than 3/8"
  • Tinted glass thicker than 1/4"
  • Reflective, wire-reinforced, textured or pattered glass
  • Laminated glass
  • Window framing systems of concrete, solid steel or solid aluminum
  • Glass where the sealant or glazing compound has visibly hardened
  • Chipped, cracked or otherwise damaged glass
Q: How do I clean and maintain the film after installation?

A: First, do not clean the film until after the 30-day dry-out period has passed. Afterwards, you can use a mild soap & water solution (we recommend a solution of no more than 1 TBS of Joy or Dawn dishwashing detergent to a quart of water in a spray bottle) applied and dried with a soft cloth, synthetic sponge, (natural sponges often have abrasive materials in them) or reduced lint paper towel. Any of the consumer window cleaning products that do not contain abrasives, commonly available at your local supermarket or variety store are typically same to use on the window film...including those containing ammonia. You should avoid using anything sharp (i.e. razor blades) or abrasive (i.e. steel wool or a stiff bristle brush) to clean the film with. NOTE: A clean, dry Bounty paper towel works well to remove the occasional fingerprint - just buff it off.

Recently, a concerned customer called us after using a commercial grade, aerosol window-cleaning product that left the film "all streaked". We suggested using the dishwashing detergent solution recommended above to re-clean the windows and she reported that it removed the "streaks" immediately.

Q: Is it okay to affix decorations to the film with tape or suction cups?

A: Following the dry-out period (30 days) there should be no problem using light suction cups or household-type light transparent tapes to temporarily affix decorations. If, upon removal, there is tape adhesive residue remaining on the film, this can easily be removed by lightly scrubbing the adhesive off with a cotton swab or ball saturated with isopropyl (rubbing) alcohol or Goo Gone.