Old windows known for their charm, simplicity — and energy loss. Those living in older homes may noaretice mounting utility bills and their windows are often to blame. Thankfully, wood window sealant can reduce energy loss and create a more comfortable indoor environment.

Here’s what to know about energy efficiency in old windows and how a good sealant can help lower energy costs.

Signs Windows Could Use Some TLC

The beauty of old windows is undeniable, but they require some extra maintenance. Be on the lookout for the following signs, as they could indicate serious problems with energy efficiency.

Drafts and Air Leaks

Drafts are often the first warning sign that something is amiss. Improperly sealed windows allow unwanted air to enter the house — think cold air in the winter and warm air in the summer. This can cause heating and cooling bills to skyrocket.

Disfigured Wood

You should never ignore warped or swollen window frames. Frame disfigurement can create gaps wherein air can escape or enter the home. This can further hamper insulation.

Broken Glass

Broken glass is alarming for several reasons. Even minor cracks can interfere with energy efficiency, reducing windows’ ability to protect against the elements.

Temperature Fluctuations Near Windows

Sometimes energy loss can occur even when everything appears normal. Pay close attention to the temperature near windows. If you notice a big difference between those areas and the rest of the house, even when windows are closed, you may want to take a closer look.

Using Wood Window Sealant to Fill in the Gaps

If you notice any of the warning signs listed above, it’s time to take action. While your client’s initial instinct may be to replace the window, if they like the look of their old windows, a repair may be a better option. Wood window sealant can be incredibly effective and sealing gaps and cracks, improving insulation, and boosting energy efficiency across the board. When applied correctly, it can leave windows looking as good as new.

This specialized sealant is designed to prevent air and water from infiltrating the window frame. In doing so, it helps protect the wood’s integrity and maintain an ideal indoor environment. Silicone sealants are especially beneficial, offering the holy trifecta of sealants: flexibility, durability, and adhesion.

Here are some of the ways wooden window sealant can lead to better energy efficiency for old windows.

Limiting Air Leakage

Air leakage can seriously impede energy efficiency. Over time, gaps and cracks can develop around window frames, allowing outside air to permeate the home and conditioned air to escape. This uncontrolled air exchange forces HVAC systems to work overtime.

The good news is, with a quality silicone sealant, you can all but solve the problem. Wood window sealant sticks well to both wood and glass, ensuring a long-lasting seal that can withstand the wood’s movement over time.

By minimizing air leakage, silicone sealant helps maintain stable indoor temperatures, thereby relieving HVAC systems and lowering energy bills.

Enhancing Thermal Insulation

Window frame gaps are notorious for heat loss and can disrupt the indoor climate if not promptly addressed. Wood window silicone sealant forms a continuous, flexible seal that improves the window’s ability to resist heat transfer. As a result, your clients will likely notice less heat loss during the winter and less heat penetration during the summer.

Preventing Moisture-Related Damage

Nothing compromises the integrity of old windows quite like water. It can cause wood to swell and rot, worsening existing gaps and cracks. Moisture damage isn’t just an eyesore, it can affect thermal performance—and clients’ wallets.

To offset these effects, consider investing in a silicone sealant. Creating a defensive barrier around the frame can protect against rain, snow, and humidity. An ounce of prevention is worth a pound of cure, and with the right products, it doesn’t take much to prevent water from ruining windows.

Strengthening Durability

It’s worth applying silicone sealant to old windows even if they aren’t showing immediate signs of damage. Operational efficiency isn’t always visible to the naked eye, and silicone sealant can greatly improve functionality over time.

You can start by applying sealant around the frame. This creates a robust seal, preventing deterioration and stopping cracks in their tracks. That way, you can drive energy efficiency for your client without needing costly repairs or replacements.

Picking the Right Sealant

If you decide to purchase a wood window sealant, it’s important to consider all your options and choose the product that’s best suited to meet your specific needs. Here are some tips for picking the best sealant.

Compatibility With Wood

Make sure whatever sealant you choose is compatible with wood. Wood is a natural material that grows and shrinks, and a high-quality sealant should be able to support this movement without sacrificing adhesion.

Our Pro Grade RTV Silicone Sealant works well with wood and is a great option for those seeking a durable, flexible sealant. While our silicone sealant for wood is not paintable, it is available in multiple colors, including clear. This allows you to find the perfect option won’t detract from windows’ natural aesthetics.

Elasticity and Flexibility

The importance of flexibility in a sealant cannot be overstated. Old windows are likely to have experienced significant wear and tear, making them more susceptible to shifting. A silicone sealant with high elastic properties can stretch and compress as the wood moves, preventing damage.

Choose a sealant that’s treated for dynamic joints and offers superior flexibility to maintain a secure seal over time. This is key to reducing energy loss.

UV and Weather Resistance

Most sealants offer excellent resistance to weather and sun damage, but it’s always a good idea to make sure before buying. UV rays can cause some sealants to become brittle, and lower-quality products may degrade when exposed to moisture and high temperatures.

Longevity

A good sealant should stand the test of time. While it’s unrealistic to think that sealants can be applied once and maintain full adhesion forever, they should last for many years without the need for frequent reapplication.

Look for sealants with a proven track record of durability. High-quality wood window sealants are designed to provide long-lasting seals that resist cracking, even as the window ages.

Anti-Mold Properties

Mold can pose significant health hazards. Old wood windows are prone to moisture-related issues, including mold and mildew growth, making it all the more important to choose a mold-resistant sealant.

These sealants contain additives that inhibit mold growth and prevent unsightly — and potentially harmful — buildup around windows. Be sure to verify that your chosen sealant offers mold resistance, especially if you work in a humid area.

Our mildew-resistant sealant is particularly well-suited to projects frequently exposed to moisture, like bathrooms or windows.

Application Ease and Cleanup

Opt for a sealant that’s easy to apply. Some sealants are easier to apply than others, offering user-friendly packaging with nozzles designed for precise application. This can lead to better performance and easier cleanup.

Achieve Greater Energy Efficiency With a Good Sealant

Old windows come with their fair share of problems, including energy loss, but a quality wood window sealant can save the day. Feel free to browse our selection of silicone sealants or give us a call today at 812-824-8000 for help choosing a sealant that’s right for your next project.