Are you trying to figure out what the best window spacer system is? Selecting a window spacer system can be especially hard if you do not understand the main function of a window spacer system.

The best window spacer system is the Super Spacer. It is the best because it significantly improves glass surface temperature, has a decent sound absorption, decreases stress on sealants, has decent heat flow resistance, and helps resist condensation better than other window spacer systems. 

Window and glass spacers are seals that are but in between panes of window glass. In the past few decades, window spacer system makers have tried many different types of material and techniques to improve window spacer systems. 

A window spacer has a vital role in the overall performance of a window because it determines how much cold or heat can get through the glass panes.

Glass panes in insulated windows are separated by window spacers. These influence the insulated glass window’s general performance.

When it comes to window spacers, the quality of the parts, flexibility, durability, and thermal properties are crucial.

Below, I will go through a couple of window spacer systems in depth. I will thoroughly explain the reasons why the Super Spacer is the best option as well.

Plus, I will answer some of the major questions regarding window spacer systems.


What Makes a Spacer System So Vital?

Since they are exposed to the outside environment, your home’s windows must make it through all kinds of weather conditions year round. They must withstand drastic temperature changes, barometric pressure and strong winds.

Even the side of the windows on the inside of the house must withstand temperature changes as well.  Plus, the edge of the insulated glass is where a window gets the coldest.

This is the part that is most vulnerable to condensation. Condensation can damage the home’s woodwork and also lead to mold growth on the house.

Good window spacers systems should aim to accomplish these four things:

  1. Produce a tight seal to stop the special gases inside the window from leaking.
  2. Raise the temperature of the insulated glass’ edges– which could aid in reducing condensation, plus raise the window’s general energy efficiency.
  3. Absorb stress due to contraction and thermal expansion.
  4. Keep out water vapor that could fog up the glass and stop moisture.

In the past, two-pane windows have spaces made of metal. Normally, the metal used in spacer systems was aluminum. The issue with using aluminum is that it is an effective material for the conduction of cold and heat.

In winter, the conduction of the cold causes the glass edges to become even colder. This cuts down on the general U-Factor of the glass and causes the energy efficiency to drop. In other words, it becomes harder to prevent heat loss with aluminum. 

An aluminum window spacer is typically shaped like a square. That kind of shape is inflexible, which is a top factor in why the seal fails and the window gets foggy.


What is a Super Spacer?

Typical windows have an extremely conductive metal spacer bar that keeps the two panels of glass separate, which then draws heat from the inside to the outside. The Super Spacer presents a non-metal, warm-edge technology for windows, which helps to produce higher-quality windows.

Super Spacers come pre-desiccated and they are made of structural foam. The patented Thermal Set Spacer provides superiority in high-performing window spacer systems and is award-winning.

Ever since it came out in 1989, the Super Spacer has developed into a leading force in spacer systems that are thermally efficient.

Super Spacer permits both expanding and contracting, which is a top cause for fracturing in traditionally sealed parts. It also has a 100 percent memory.

In enhanced testing, the Super Spacer was shown to last more than twice as long as the other two seal systems. Plus, it lasted five times longer than one seal systems.

Windows with Super Spacer attain the uppermost Window Energy Ratings from the National Fenestration Ratings Council. The majority of PVC-U and old-style wooden windows contain low-grade glazing beads and gaskets.

This produces issues for average spacer bars made of aluminum that jut into the window’s sightline. A Super Spacer has a sightline that is lower (equal to 9.8mm from the glass edge) which gets rid of the issue.

The Super Spacer also retains the look of the profile color into which it gets glazed. For instance, if a Super Spacer is glazed into a white colored profile, it mirrors the white color. This gets rid of a reason for stocking lots of different colors which makes it easier to order and control stock.


Top Five Reasons Why the Super Spacer is Best

It Improves Glass Surface Temperature Significantly 

A Super Spacer’s tremendously low thermal conductivity causes less disparity in the IG unit’s surface temperatures.

A Super Spacer unit withstands temperatures of 140°F/60°C and humidity levels of 95% to 100%. Plus, the continual bombardment of ultraviolet rays during the world’s toughest test of durability which is the P-1 chamber.


It Improves the Absorption of Sound Better Than Other Window Spacer Systems

The closed-cell polymer foam used in Super Spacers transmits far less sound in comparison to regular aluminum spacers.

Acoustically laminated glass, one or more Super Spacers and different levels of thicknesses of glass are recommended wherever noise from airplanes, trains or automobiles are a concern.


It Decreases Stress on Sealants

The thermoset polymer material in the Super Spacer expands and contracts. Plus, it returns to the original shape every time. Super Spacer sealed IG units stay in decent condition five times more than traditional units with only one seal (as shown in strength tests).


It Has Top-Notch Heat Flow Resistance

The all-foam formulation prevents the transfer of heat and delivers one of the top thermal performances available on the market. The Super Spacer resists heat flow 950 times more than aluminum does.

This yields more savings. Plus, it prevents condensation and reduces the possibility of mold growth.


It Helps Resist Condensation Better Than Other Window Spacer Systems

A window has to be at least a little wet for mold growth. Moisture increases the probability for fungi, mites, and viruses which produce infections, asthma, and allergies.

The significantly decreased interior condensation or fogging means any health issues caused by mold can be almost completely eradicated.


Other Window Spacer Systems

EdgeTech SST Foam Super Window Spacer

The EdgeTech company went above and beyond and created a Super Spacer made of foam. This SST Spacer System boasts a non-metal creation that gets rid of cold-edge, metal-to-glass construction on the glass edges.

This guarantees better insulation on the edges of the glass, which is the location on the window that typically has the least effective insulation. Plus, it nearly gets rid of all of the condensation located on the edges of the window which are related to metal spacers which conduct cold air.


PPG Intercept Warm-Edge Window Spacer

To fix issues caused by window spacers being made of the aluminum spacer, PPG introduced the Intercept Warm-Edge Spacer in 1992.

This product boasts an exclusive, one-piece stainless steel alloy which produces an efficient thermal barrier that aids in reducing conducted heat loss. Plus, the glass edges stay warmer as well. The U shape makes it able to flex which reduces the chances of seal failures.

When the temperature changes, the Intercept spacers bend instead of the sealant, which helps them stop the spacer from moving. Traditional window spacers made with aluminum would have the issue of seal failure which causes the insulation capability to fail as well.

PPG Intercept’s window spacer includes “Warm-Edge” tech that reduces condensation issues around the perimeter of the glass. Just compare the Intercept insulated glass window with a traditional insulated glass window, and you will see that while both kinds feature Low-E and have argon gas, the type of window spacer certainly makes a difference.


Final Words

Manufacturers are constantly attempting to increase the energy efficiency of homes. They have gone to using innovative window glass spaces to increase the energy efficiency of homes.

Don’t ever neglect a window spacer. Not ever. You will end up with all kinds of damage to your home such as damage caused by the build-up of condensation.