Fastening a window sill inside - step by step
Window sills are used primarily as a storage area for decorative items. The windowsill can be fixed in less than an hour on your own.
Window sills are made of wood, natural stone, artificial stone and plastic-coated wooden panels. Artificial stone is considered by many homeowners to be the best choice. In addition to durability and ease of maintenance, these window sills offer high design diversity at an affordable price of around 15 euros per meter.
Attention: Adjust the depth of the windowsill to the window position in the soffit and the wall thickness. Also be careful with the width, because a projection of three centimeters per side is the rule.
1. Installation area must be clean and level
In order to be able to mount the windowsill, the installation area must be clean and level. Therefore, cleaning is at the beginning of assembly. If the surface has strong bumps, first plaster so that an approximately flat image is formed. The plaster must dry completely before it can continue.
2. The moistened surface receives a layer of mounting foam
The easiest way to fix the window sill inside is with mounting foam. This attachment method works almost independently of the material, because even uneven stone holds on the surface. Lightly moisten the entire surface first. The sprayed on mounting foam should have a thickness of about 1.5 centimeters. If necessary, the substance can be spread with a spatula.
Tip: Smaller bumps can also be satisfactorily leveled out with the foam.
3. The sill should not slip when fastening
The sill can be fixed to the foam by inserting it under the window frame. A spirit level can be used to check the position. To prevent slipping, weigh down and support with wooden wedges on the sides. The mounting foam then has to harden and grows to about three times its thickness.
4. The window sill for the inside requires a seal
The mounting foam is now cured and is certainly a bit over. A craft knife can free the windowsill from these overhangs. Then seal the new window sill. All joints around the windowsill receive a silicone filling. Then smooth out the silicone. After about one day, the joints are hardened and the new windowsill can be used.
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