How do I repair my window seal

How are defective window seals repaired?

A leaky window can be very uncomfortable - on the one hand it disturbs the comfort factor in the room considerably, on the other hand it can also increase the additional costs. Tischler-Schreiner.org shows where the causes of defective window seals are and how you can repair them!

Leaky windows are not a rare problem: especially in old buildings, tenants often suffer from inadequate sealing and the associated problems. In some cases there are disputes with the landlord as to how and whether a specialist can and should fix the fault on the window.

Why is careful window sealing so important?

The condition of the windows plays a decisive role in saving energy: If the window seal is defective, the thermal insulation also suffers. The result is higher ancillary costs. In addition, the lack of sealing can lead to the formation of mold and decay in wooden windows, as this allows moisture to penetrate. In addition, a defective or non-existent window seal is also uncomfortable: On the one hand, unpleasant drafts get into the room, on the other hand, pollen and fine dust penetrate. In addition, the seal also provides protection against noise - if the window seal is missing, noise also penetrates the room almost unfiltered. Correct sealing is therefore not only important for the condition of the windows themselves, but also crucial for the indoor climate.

Signs and causes of a poor seal

An early sign of the lack of waterproofing is the draft that enters the room through tiny cracks, holes and crevices. This damage to the window seal can also cause mold, which is a problem especially with wooden windows. But even if you have to heat a lot and the room still does not heat up, you should check the sealing of the window: The massive loss of heat through the window can be the first sign of a poor window seal.
There are many reasons for leaky windows: One common reason is the age of the window, but an improperly applied seal can also cause problems.

These causes can be counteracted with regular window maintenance. Clean the windows and window seals every now and then with clear water, keep them as dry as possible and keep oils and grease away from the seal in order to increase the service life significantly.

How is the window waterproofing repaired and renewed?

If the window is leaky, there is an urgent need for action - consequential damage can only be avoided through quick repairs. But how is a leaky window actually repaired?

Analysis of the problem

First of all, of course, you need to find out that there is a leak in the window - in most cases, the defect will be noticed by the already mentioned drafts. To make sure that the problem is with the window, you can hold a candle to the window: the flickering of the flame indicates a poor window seal. If you are sure that the window is leaking, you should hire a specialist - laypersons who try to repair the window themselves often cause even greater damage, because the various window seals often differ greatly from one another. The right solution must be found for each model.

Choice of materials and repairs

First of all, the professional determines which seal must be used - to do this, he checks the existing window seal and its profile. Then the professional oil the moving parts of the fittings if necessary. Then he carefully cleans the window of dust and dirt in order to be able to work precisely. The skilled person usually uses a rubber seal, but foam is also used from time to time.

Rubber is a little more expensive than foam, but it is also much more durable - with the right care.

First the professional removes the old seal. This is done either with a cutter knife or a spatula. The new window seal is then attached. To do this, the craftsman presses or glues the rubber or foam seal into the groove of the window. It is important that the seal exactly matches the profile of the window - even minimal deviations can ensure that the window continues to leak.
Sealing with silicone or acrylic is also possible. This differs from rubber and foam seals primarily in terms of consistency: silicone is rather tough and only hardens after it has been applied. If the window is glued to it, the seal still has to dry - to do this, the silicone or acrylic is covered with a film and covered for up to 72 hours. At the end, this film can simply be peeled off.

The sealing of a window should be done as quickly as possible in order to avoid consequential damage such as the formation of mold or excessive ancillary costs. However, laypeople should always consult a specialist - he can determine where the problem is localized and apply a new seal that is optimally adapted to the window.