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Sealing windows - How you can seal old wooden windows

If you have old wooden windows in your home, you may be familiar with the problem of drafts and heat loss. Fortunately, there are effective ways to seal your windows and improve insulation. In this blog post you will learn how to successfully seal your wooden windows to reduce drafts, save energy and increase comfort in your home.

  1. Check the condition of the seals
    The first step in sealing old wooden windows is to check the condition of the existing seals. Window sealing tape is a crucial element in reducing drafts. Carefully inspect the seals for cracks, wear or deformation. Damaged seals should be replaced to ensure an effective seal.

  2. Use high quality sealing materials
    For optimal sealing, you should use high-quality sealing materials. Rubber seals or special sealing tapes are a good choice as they provide an effective barrier against drafts.

  3. Apply sealing inside and outside
    To maximize the effectiveness of window sealing, you should install sealants both inside and outside. Interior sealing can be done, for example, by applying sealing tape between the window frame and the wall. External seals can be achieved by applying caulk along the window frames. This double layer of waterproofing helps to effectively block drafts.

  4. Swelling tapes for moving parts
    On older wooden windows, moving parts such as window sashes and frames can develop some play over time. To avoid drafts here too, you can use swelling tapes. These special bands are placed between the moving parts and swell to fill the gaps when the window is closed. This creates an additional seal and prevents drafts.

  5. Professional help for serious problems
    If your wooden windows are badly damaged or in poor condition, it may be advisable to seek professional help. An expert can assess the condition of your windows and suggest appropriate sealing measures. In some cases, resealing or even replacing windows may be the best solution to improve the energy efficiency and comfort of your home.


Old wooden windows do not necessarily have to lead to drafts and loss of energy. Through targeted sealing, you can improve the insulation of your windows and increase living comfort. Check the seals, use high quality materials and ensure double sealing inside and out. With these measures you can effectively seal your old wooden windows and benefit from better thermal insulation. If necessary, don't be afraid to seek professional help to achieve optimal results. (see “Energy advice” below)

With high-quality sealing materials such as self-adhesive felt tapes and neoprene strips, you can successfully complete your window sealing and improve your home's energy efficiency. Choose the right products to reduce drafts, minimize heat loss and increase comfort in your home.

To help you seal your wooden windows, we offer a selection of high quality products:

  1. Self-adhesive felt tapes:

If you are looking for a reliable and versatile solution, we recommend our self-adhesive felt tapes. These bands are available in a thickness of 1 mm and are available in black or white. They are ideal for various applications such as craft projects, felt furniture gliders and DIY work. Our felt tapes not only offer effective protection against scratches and noise, but are also easy to attach thanks to their self-adhesive backing and last a long time.

  1. Self-adhesive neoprene strips:

Another great option is our self-adhesive neoprene strips. These strips provide a simple and quick solution for sealing, sealing and shock absorption. Neoprene is known for its excellent resistance to moisture, wear and chemicals such as oils, grease, solvents and certain acids. Our self-adhesive neoprene strips are versatile and will help you effectively seal your wooden windows.

Find an energy consultant - Federal Ministry for Economic Affairs and Climate Protection


BMWK - Energy management: Because every degree counts (energiewechsel.de)

Expert search for residential buildings, recommended by the BMWK :

Energy Efficiency Experts (EEE)

If you have any questions or need professional help sealing your wooden windows, do not hesitate to contact an expert. In some cases, resealing or even replacing the windows may be the best solution for optimal results. Ensure that your old wooden windows are effectively sealed and enjoy a comfortable and energy-efficient home.