Choosing the right window sills and structural elements, such as sills and clinkerite, are key aspects to the comfort and durability of your interior, so it’s worth checking the options available carefully. In this article, we’ll discuss popular options for exterior and interior window sills, as well as explain what clinkerite and sill, their functions and whether clinkerite is waterproof. Learn about the best materials for window sills and what their properties are.

Exterior window sills – aluminium and steel

External window sills need to be durable and weatherproof, so the most commonly chosen materials are Aluminium window sills are a modern solution worth choosing for your interior design. Laminated steel sills are a durable alternative worth choosing for modern building projects. What are their properties and what is worth looking out for?

Aluminium window sills

An aluminium exterior window sill is lightweight, rust-resistant and very durable. Aluminium copes well with moisture and fluctuating temperatures, making it an ideal choice for external window sills that can be selected for modern buildings. Aluminium window sills are scratch resistant and easy to maintain, requiring only periodic cleaning to maintain an aesthetically pleasing appearance.

Laminated steel window sills

Laminated steel window sills are exterior window sills made of galvanised steel, coated with a special protective layer. The steel is characterised by high mechanical strength, and is therefore resistant to harsh weather conditions and intensive use. The laminated surface prevents corrosion and ensures colour fastness. However, it should be remembered that a steel window sill is heavier than an aluminium one, which affects the difficulty of installation. Adequate protection with laminate guarantees its resistance to water, which is key in protecting against rusting.

Which interior window sills to choose – PVC, MDF Laminated and Quartz Conglomerate

Interior window sills should not only be aesthetically pleasing, but also durable and easy to care for. Popular solutions include PVC sills, MDF laminated sills and internal sills made of quartz conglomerate.

PVC window sills

PVC window sills are a lightweight, durable and waterproof solution for internal window sills. With a low price, high moisture resistance and a wide range of colours, PVC is a popular choice for window sills. PVC window sills are also easy to keep clean, making them a practical choice for homes and flats. Although PVC window sill is moisture resistant, avoid contact with sharp tools that can damage the surface.

MDF laminated window sills

MDF laminated windowsills This is an aesthetically pleasing and functional solution that is more resistant to moisture than raw wood, making it an ideal choice for window sills. An interior window sill made of MDF can be covered with laminate, which protects it from scratches and ensures that it is easy to clean. Due to the properties of MDF and the coating used, these window sills are more resistant to UV radiation, preventing colour fading.

Internal sills made of quartz conglomerate

Quartz conglomerate internal window sills are one of the most luxurious and durable options. Consisting mostly of natural quartz and polymer resins, quartz conglomerate is resistant to moisture, scratches and heat, making it the perfect material for a window sill. An interior window sill made of conglomerate provides an elegant appearance and is available in a wide range of colours, often imitating natural stone, making it the choice for any décor. It is the perfect choice for those who value high quality and aesthetics.

Clinkerite and Underpinning – important construction elements

What is placed under the windows?

Thermal insulation foundations are most often used under the windows, which improve the stability of the structure and thermal insulation. Underpinning made of suitable materials, such as XPS foam, effectively protects the window structure against moisture and heat loss.

What is clinkerite?

Aclinkerite is a special structural element, fitted to the edges of windows or doors, which has a thermal insulating and stabilising function. Thanks to clinarite, heat loss at the junction between the window and the wall is minimised, which is particularly important in energy-efficient buildings. Clinarite increases the tightness of the structure and improves thermal insulation.

Is clinkerite waterproof?

Clinarite is water-resistant, which means that it prevents moisture from penetrating the gaps between the window and the wall. As a result, it improves thermal comfort in the interior and protects the walls from moisture, thus preventing the appearance of mould.

What are the best window sills? What kind of window sill should I choose for my window?

The best window sill is one that meets our aesthetic and functional needs and fits the conditions in which it will be used. In the case of external window sills, aluminium and laminated steel offer durability and resistance to weathering. Interior window sills made of quartz conglomerate are elegant and durable, while PVC and MDF laminated window sills are an excellent choice for everyday use, combining durability with easy maintenance.

With the right materials and proper installation, both the exterior and interior window sills will provide thermal comfort, durability and an aesthetically pleasing appearance for years to come.