SLIP™ FAQS.

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Interior SLIP™ Install

There are a few items you should be aware of if you wish to install SLIPs on the interior side of the sash.

Will the installation of SLIPs on the interior face of the sash interfere with any hardware? If hardware is in the way, it can sometimes be moved to a different location to make way while still allowing an aesthetic look. You must make sure there is a 1.5-inch clearance of any hardware or other interference on all sides within the interior daylight size. The face must be a clear and flat surface. Hardware that could interfere may include locks or handles.
You must make sure the SLIP would have enough room to fit on the interior sash face and not interfere with the interior sash stops. You must make sure there is a 1.5-inch clearance of any hardware or any other interference on all sides within the interior daylight size.
On a double-hung window, will the top SLIP fit between the bottom sash check rail when flitting flush on the upper sash? This may vary by window. Sometimes you must place the bottom sash check rail to allow for better clearance. SLIPs sit 5/16 inch above the face of the sash.

The SLIP™ extrusion inside edge should meet and sit on the outside edge of the putty glazing but should not extend over the putty. The SLIP will extend 3/4 inch to the edge of the sash from the outside edge of the putty glazing and sit approximately 1/4 inch above the face of the sash.

Click the link to take you to the EPA’s PDF pamphlet for information about lead paint.

Yes, extensive testing on the product compared to a substitute product was done by the University of Oregon’s Energy Studies on Building Laboratory. The results of that study can be seen.

SLIPs won’t cause any fogging due to vent holes evenly placed. This allows for an even air pressure between both panes and on the exterior. SLIPs may fog about a week after installation due to the chemicals in the cleaning solution that was used on the glass, but this should subside in about one week. If fogging does not subside, this may be due to an air vent being pinched off, and adjustments to the fastening of the SLIP™ could be necessary.

SLIPs weigh approximately 1 ¾ lb per square foot.

Currently, we only make SLIPs to fit on square and rectangular-shaped windows.

SLIP™ Extrusions are painted with PPG products. The current colors are as follows:

• Delicate White-PPG1001-1
• Bronzed Carmel- MTL140
• Pearl (Yellow-Beige)- PPG1087-2

You must check to make sure hardware will not be an issue for a successful installation. SLIPs sit approx 1 inch outside the daylight of a window. If the hardware is not fixed, hardware can be moved to remedy space issues.

A certified installer will access possible hardware challenges during an initial evaluation.

• There are many many benefits to keeping your original wood windows. Your wood windows were most likely handcrafted from cedar or fir. It is not easy to find high-quality wood windows, especially hardwood windows, being produced today and if by chance you do, they are quite expensive. This means that your home will hold more value with the original windows. This dense wood does not succumb to dry rot easily.
• Wood windows are the most revered windows on the market.
• Your wood windows were built for your house, and therefore, match the design and aesthetics.

You can contact customer service through email. Someone will reach out to you soon.

• Sales Support: sales@windowslip.com
• Installation Support: support@windowslip.com

If your window glass is broken, you will want to get this fixed prior to the SLIP™ installation, or the product will not function as intended.

On casement windows, we use KERF mounted bulb weatherstripping. On double-hung and single-hung windows, we use a combination of KERF mounted bulb weatherstripping and KERF mounted PVC weatherstripping.

• Do not use a power washer to clean SLIPs. Power washing SLIPs could force water into the interior window glass through vent holes, causing water staining on interior glass surfaces.
• The glass is tempered and soft. Use a mild soap and a soft cloth to clean it. Abrasive or rough products of any kind can scratch the glass.
• Do not caulk or paint heavily around the SLIP. It could block the vent holes and cause fogging. If sweating is an issue, more ventilation is required.
• Do not remove the blue back from the glazing tape.

A certified installer can provide you with an estimate on getting SLIPs on your windows. If you are buying SLIPs directly, fill out the online form with your desired product specifications, and we will contact you with a quote.

SLIPs can be made as large as 20 square feet and as small as 1 square foot. This is the largest/smallest SLIP we ship. For larger SLIPs, you must contact a certified SLIP™ installer.

SLIPs cannot be installed on slider windows.

SLIPs are built for long-term use and should last the life of the window.

Weatherstripping and the hidden balance will have normal wear and tear over time.

SLIPs do work on doors just as they do on windows. SLIPs do not work on slider doors. Before buying a SLIP for a door, make sure the door hardware will not be in the way of the installation.

Glass and the SLIP – Do not worry, the condensation will go away after you clean the evaporators. If condensation persists, either one or more of the SLIP fastening screws is too tight, pinching off the air vents. If condensation appears, check the screw, especially near the air vents to make sure they are not too tight. The SLIP needs to rest snug to the sash, but be sure not to overtighten.

It's very easy to remove a SLIP if you want to clean your original window glass. You simply unscrew the fasteners on the sash and remove. This is easier with a suction cup.

It is possible to use ropes for operation with SLIPs. You’ll need to adjust the counterbalance weight in the weight pocket. We do not provide instructions or support for using SLIPs with ropes. Consult a certified installer if you wish to do this.

SLIP™ extrusions come coated from the factory in three colors.

Many times, windows are painted shut. The certified installer will address this when installing SLIPs. When installing on your own, you will have to cut the paint lines on your sash to get your windows operating and also install balances or weatherstripping.

SLIPs are coated with a PPG paint. This paint acts as a primer that allows for painting.

Ten-Year Warranty Slim Line Insulating Panes (SLIPs) are designed to insulate and protect sashes from the weather. SLIPs are manufactured in Oregon City, Oregon, using aluminum frames with a paint finish and tempered safety glass, a gasket around the perimeter of the aluminum extrusion, and stainless-steel screws. Although Chosen Wood Window Maintenance, Inc (CWWM) is not the SLIP installer for DIY Kits, CWWM warrants this product (not the installation) to be free from defects in workmanship and materials, under normal residential use and conditions, for ten (10) years from the original date of purchase. This warranty does not cover glass breakage, wear spots, or scratches. CWWM agrees, at its option during the warranty period, to repair any defect in workmanship or materials or to replace the product without charge (except for a fee for shipping, handling, packing, return postage, and insurance which will be incurred by the customer). Such repair or replacement is subject to verification of the defect or malfunction and proof of purchase as confirmed by showing the fabricated dimensions of the SLIP on the original dated invoice or sales receipt. Installation of the repaired or replaced product is not covered. Tempered safety glass can withstand considerable impact, but it can break, and Low-E coatings can be scratched easily. Do not caulk or paint heavily around the SLIP, as it could block the vent holes and cause fogging. Do not use metal or abrasive materials when cleaning. Use a mild dish soap and soft cloth for cleaning. Rinse or squeegee off as a last step. Use care that the squeegee is free of grit that could scratch the glass or coating. Clean SLIPs thoroughly and often for years of enjoyment.