In an effort to reach more people with this great product in 2020, we will start selling SLIPs in DIY Kits. A single pane window insulation kit. These kits are great for savvy homeowners or for a contractor to install. You can install SLIPs on your own if you have the right level of woodworking skills and familiarity with tools. Installing SLIPs on your windows can be a great home improvement project to do it yourself to increase the comfort and performance of your house. We provide you with a SLIP™ installation video on multiple window types that will guide you through the different steps of the project. We pack your materials in the kit assembled, cut, and labeled. Grab your tools, open the kit, and start the install.

Before ordering the product ask yourself some questions…

Should you DIY?

Are your windows right for SLIPs?

SLIPs are a great product for square/rectangular wood windows. This is due to the SLIP needing to cover the whole surface of the original window glass. SLIP extrusions that need to be fastened to the sash are 3/4″ and screw in at a slight angle. Its recommended that you have a 1″ space on the exterior sides of your putty glazing.

If you wish to install SLIPs on interior…CLICK HERE

Do You Have The Skills?

Woodworking and technical skills are needed to successfully take on this project.  Installing SLIPs on a fixed window is rather easy. Installing SLIPs on a single hung or double hung window is a lot more complex and takes much more steps.

Fixed windows– Installing a SLIP™ on a fixed window in a simple job and involves cleaning and prepping the window before applying the


Operating Casement Windows (including french casements, awning, hopper)- If Weatherstripping is not needed this will be similar to the  fixed window install. We do recommend weatherstripping to get the benefits of the whole SLIP system by using our provided kerf in weatherstripping. Doing this involves removing the sash, kerfing 4 sides of the operating window. The process may also involve measuring and planing the sides of the sash.

Double/Single Hung Windows- These are the most complex and have the most steps for successful installation. Installing on this type of window requires disassembly of the window. Steps involve removing the sash, kerfing, channel routing, stringing the balances, caulking and more.

Do you have the time?

Installing SLIPs on casement windows can take 1-2 hours per windows. Installing SLIPs on a single hung or double hung can take approximately 3-4 hours per window.


Working on any home improvement project requires a certain knowledge of safety. Tool safety, ladder safety, proper PPE, and more. You must make sure you are aware of the hazards when taking on a home improvement project.

If your building was constructed prior 1978, you can assume lead paint is existing on the windows. Working around lead paint takes proper precautions. If you do not know how to work around lead paint, pleas reevaluate if you would like to take on this project. When doing a project we try not to disturb the lead paint, but it can happen on occasion. Please call 1 (800) 424-LEAD [5323] to talk with a specialist.

Double hung Sash Operation

Yes you can use ropes! The reason we offer balances when ordering the SLIP™ Kit is because there are more unknown variables to calculate when using ropes . Also, shipping dense lead weights increases shipping costs dramatically. Here are a couple things to account for when using ropes.. CLICK HERE


 All components are ordered, made, and assembled to the custom sizes given and calculated weights

  • SLIPs

  • Hidden balances

  • Weatherstripping (vinyl & Bulb)

  • Router/kerfing jigs

  • Screws & tabs


  • Philips head screwdriver/drill
  • Plunge Router
  • Glass cleaner
  • 1 inch Spade bit or a Forstner bit
  • Suction cup
  • Wood planer
  • Trim router
  • Tape Measure
  • Nail Gun(16 Gauge recommended)
  • Caulking gun with latex
  • Nail pullers
  • Multi purpose pry bar


If you feel like you’re equipped with the necessary skill set and tools, follow these steps to get you on your way!

1) Measurements
Get the daylight measurement of your windows. All materials are custom made to your exact declared specifications. Therefore, they must be precise. Follow the link to learn How To Measure 

Click Here

2) Request a Quote
Fill out the quote form with the your window specifications.

Click Here

3) Review
Receive quote and review to make sure everything is accurate and accounted for.

4) Ordering
Order the the SLIP™ Kit through our online customer portal. You will sign a sales agreement that shows the shows the order and lists terms and agreements of the sale. 50% of the order total and 50% is required when the order is ready to ship.

5) Make Room
SLIP™ kits arrive in crates. Depending on the order, crates can be heavy and large. Crates will be the larger than the largest height and the largest width given on your measurements. Crates arrive LTL and there must be a planned space to put it when arrived.

6) Wait in anticipation
All products are custom made. We will give you an Estimated time of arrival when your shipment will arrive. SLIP™ kits are crated and and will arrive LTL to you. SLIPs are custom made and can take approximately 4-6 weeks to arrive after order is placed.