Spouwdichtingen

Spouwdichtingen are seals used in spouwmuren (cavity walls) to close the gap between the inner and outer wall leaves. The primary aim is to prevent drafts, moisture ingress and rain penetration, while contributing to energy efficiency, insulation and overall building performance. They are applied during construction or renovation and can occur around window and door openings, at penetrations such as pipes and cables, along joints in the cavity, and at transitions where the wall geometry changes.

Common types and materials include expanding polyurethane foam, silicone, polyurethane or acrylic sealants, EPDM rubber gaskets, and sealing tapes. Some spouwdichtingen are pre-formed profiles or gaskets integrated into window and door frames. Seals are typically chosen for flexibility to accommodate movement and for compatibility with surrounding materials. In some cases fire-resistant or acoustic-rated seals are used depending on the performance requirements of the assembly.

Installation considerations involve proper surface preparation, material compatibility, and adherence to curing or setting times. In cavity applications, it is important to avoid overfilling, ensure continuity around penetrations, and prevent the creation of moisture-trapping zones. In renovations, attention is given to maintaining insulation continuity and avoiding thermal bridges.

Performance aspects include reducing air leakage, limiting moisture transport, and contributing to damp-proofing and thermal performance. The chosen material can influence fire resistance and acoustics, and seals may degrade due to UV exposure, temperature changes, or chemical interactions, necessitating periodic inspection and replacement.

Standards and guidance for spouwdichtingen are provided by national building codes and European standards related to damp-proofing, insulation and fire safety, as reflected in project specifications and supplier data sheets.