Window installation solution for concrete sandwich panel facade system

To minimise heat losses around windows, the joints between the window frame and wall must be sealed with a construction foam. For window installation, it is important to choose a PU foam that has an elastic structure and is therefore able to move with the building’s deformations, and which has excellent thermal- and sound-insulation values. Before applying the PU foam, the window must be mechanically fixed and supported according to the window manufacturer’s instructions. When applying the PU foam, the surfaces must be pre-moistened to ensure a uniform foam structure.

Elastic Gunfoam 198 – a one-component polyurethane gun foam for installation works and sealing of pressure sensitive, movable joints and penetrations.

Alternative products: Installation Express 123 – a fast curing and high yield one-component polyurethane gun foam for window and door installation during the summer months.

Installation Gunfoam 65 156 – a high yield one-component polyurethane gun foam for summer time window and door sealing and installation works. Adheres well to most common construction materials such as wood, concrete, stone, plaster, metal, PVC and polystyrene. Ensures airtight and soundproof sealing.

To avoid heat losses, condensation and mould growth, the window and wall connecting joints should be sealed from the inside with air- and vapour-proof tapes.

Window Tape Full Glue +1 Internal 400 – an airtight elastic double-sided tape for moisture and air proofing internal window and door joints. One side of the tape is fully covered with a strong adhesive layer, while the other side has an acrylic adhesive strip. Double-sided adhesive layers guarantee an extra strong bond with most common construction materials.

Alternative products: Vapour Proof Full Glue Tape Internal 410 – an elastic double-sided tape for moisture proofing internal window and door joints. Covered fully on one side with a strong adhesive layer and on the other side with an acrylic adhesive strip.

Window Tape Internal 420 – an elastic and airtight tape for moisture proofing internal window, door and wall joints. Covered on one side with two adhesive strips and on the other side with an acrylic adhesive strip.

External window tapes help to protect the window joint and building structure from accidental water ingress.

Window Tape Full Glue +1 External 404 – an airtight and elastic double-sided tape for external use. Protects the building’s structure, window and door joints from moisture and wind penetration. One side of the tape is fully covered with a strong adhesive layer, while the other side has an acrylic adhesive strip. Double-sided adhesive layers guarantee an extra strong bond with the most common construction materials.

Alternative products: Wind Proof Full Glue Tape External 414 – an elastic vapour permeable double sided wind barrier tape for sealing external window and door joints and protecting the buildings structure against moisture and wind. Covered fully on one side with a strong adhesive layer and on the other side with an acrylic adhesive strip.

Window Tape External 424 – an elastic vapour permeable wind barrier tape for sealing external window and door joints and protecting the buildings structure against moisture. Covered on one side with two adhesive strips and on the other side with an acrylic adhesive strip.

The joint between window and wall is deep and sealing only the wall end does not give good insulation. For wider joint filling and to ensure the proper size and shape of sealant in the joint and avoid triple adhesion, a backer rod must be used.

Backer Rod PE 450 – a round backer rod with closed cell structure. Highly flexible and compressible for easy installation

A tight weatherproof joint between the window and wall protects the wall structure against wind, rain and snow. It also works as sound reducer. For long-lasting, weatherproof joints, a special facade sealant with high movement capability must be used to compensate for deformation in the joint without losing its elasticity or adhesion.

Facade Joint Hybrid 25LM – a completely weatherproof facade sealant to protect the structure from UV radiation, rain or snow, and wind. Can be overpainted with water-based paints.

An alternative product: PU-Sealant LM 825 – a polyurethane sealant with high movement capability and high elastic modulus. Suitable for sealing and insulating interior and exterior surfaces that are subject to heavy wear.

Using adhesive foam in external window sill installation improves the window’s sound- and thermal insulation and helps to prevent the appearance of thermal bridges.

Fast Foam Adhesive 888 – a multipurpose foam adhesive with extra fast and strong bond. Suitable for exterior and interior adhesion works. Adheres well to most common building materials such as wood, concrete, stone, plaster, etc.

Alternative product: SpeedFix Construction 878 – a foam adhesive with EasyGun applicator for fixing exterior and interior insulation boards, windowsills, construction blocks, etc. Suitable for exterior and interior use. Excellent adhesive and thermal insulation properties

Adding sealant under the external window sill ensures a tight weatherproof joint between the external window sill and the wall to protect wall structures against wind, rain and snow. It also works as a sound reducer.

Facade Joint Hybrid 25LM – an MS polymer-based hybrid sealant for sealing and filling various exterior and interior joints. Perfect for joints that require high elasticity and weatherproofing.

Alternative products: Expanding Tape 300Pa – a pre-compressed elastic self-expanding polyurethane foam tape for sealing connection and expansion joints. After installation, the tape expands to fill the gap and creates a permanently elastic and airtight seal.

Expanding Tape 600Pa – a self-expanding BG1 polyurethane foam tape for sealing connection and expansion joints. The tape is airtight and suitable for demanding weather conditions: it protects the joint against dust, wind and driving rain of up to 600 Pa. In addition, it is permanently elastic and impregnated in fire-resistant acrylic dispersioon material.

To guarantee a weatherproof window joint, it is important to remember to seal the external window sill with an elastic and weatherproof sealant.

Building Silicone 322 – a multipurpose neutral silicone sealant with high movement capability and excellent adhesive properties. Forms a mould-proof and ageing-resistant flexible silicone rubber seal.

Alternative products: General Silicone 339 – a multipurpose neutral silicone for general construction work. Forms a flexible and weatherproof silicone rubber seal.

All Weather Sealant 919 – an immediately waterproof rubber-based sealant that is silicone free and can be used for quick repair works on facades and roofs, even during rain. Adheres well to most common roofing materials and can be applied even on wet, slightly oily or bituminous surfaces.

Compared to traditional methods, gluing the windowsill with an adhesive foam saves time, improves the window’s sound- and thermal insulation and helps to prevent the appearance of thermal bridges.

Fast Foam Adhesive 888 – a multipurpose foam adhesive with extra-fast and strong bond. Suitable for exterior and interior adhesion works. Adheres well to most common building materials such as wood, concrete, stone, plaster, etc.

Alternative product: SpeedFix Construction 878 – a foam adhesive with EasyGun applicator for fixing exterior and interior insulation boards, windowsills, construction blocks, etc. Suitable for exterior and interior use. Excellent adhesive and thermal insulation properties

The easiest way to install construction boards to the window jamb is to use one of Penosil’s adhesive foams. The adhesive foam saves time, improves the window’s sound-and thermal insulation and helps to prevent the appearance of thermal bridges.

Fast Foam Adhesive 888 – a multipurpose foam adhesive with extra fast and strong bond. Suitable for exterior and interior adhering works. Adheres well to most common building materials such as wood, concrete, stone, plaster, etc.

Alternative product: SpeedFix Construction 878 – a foam adhesive with EasyGun applicator for fixing exterior and interior insulation boards, windowsills, construction blocks, etc. Suitable for exterior and interior use. Excellent adhesive and thermal insulation properties.

One of the last steps in window installation is the final sealing and filling of window joints. For this work, it is highly recommended to use sealants with the right properties and high elasticity.

Building Silicone 322/322C – a multipurpose, neutral silicone sealant with high movement capability and excellent adhesive properties. Forms a mould-proof and ageing-resistant, flexible silicone rubber seal.

For this type of works, we recommend using sealants with high flexibility and using our patented spatula to apply the product. By strategically applying more sealant in the corners during installation, the joints can better withstand deformations. Despite efforts to minimise cracks, sealing work is often still necessary on-site due to the significant risk of cracks occurring during transportation.

ECO Elastic Acrylic 622 – an elastic sustainable siliconised acrylic, based on recycled and bio-based materials for filling moveable gaps and joints before painting and other finishing work.

Alternative product: SilAcryl Elastic 610 – a bright white, plasto-elastic, siliconized acrylic sealant for filling moveable gaps and joints before painting. Its bright white and extra-fine texture ensures smooth, perfectly finished and long-lasting surfaces.

To create an airtight seal between the glass and the window frame, and to protect the joint from UV radiation, rain, snow, and wind, a sealant with high movement capability should be used. This will allow the joint to accommodate various deformations without compromising its elasticity or adhesion.

Glazing Silicone 330 – a high-quality neutral alkoxy silicone sealant with excellent adhesive properties and low modulus. Forms a flexible rubber seal with many porous and non-porous materials.

Alternative product: Building Silicone 322 – a multipurpose neutral silicone sealant with high movement capability and excellent adhesive properties. Forms a mould-proof and ageing-resistant flexible silicone rubber seal.

Often priming is useful before adhering the window tapes in order to improve the adhesion with complicated surfaces, especially at low temperatures.

Prime&Fix 900 – a multipurpose synthetic rubber-based sprayable adhesive and primer for interior and exterior use. Forms a fast and strong bond with a wide range of materials, including many porous materials. Can be used as an adhesion promotor for window tapes.

In order to maintain the airtightness of the joint when connecting the window tapes, an elastic and dense glue must be used when connecting the overlays.

SpeedFix Crystal 799 – a multipurpose transparent hybrid adhesive sealant with high tack, good elasticity and strong bond for interior and exterior use. Suitable for uneven surfaces, and for movable joints.