How can a ventilated façade be protected from mice? - briefly
Seal all openings with metal mesh or stainless‑steel flashing, install rodent‑proof vent covers, and apply a continuous rodent‑resistant barrier around the cavity perimeter. Regularly inspect and maintain these protections to prevent entry points.
How can a ventilated façade be protected from mice? - in detail
A ventilated curtain wall must be sealed against rodent entry to preserve insulation, structural integrity, and indoor air quality. The following measures address the most common pathways and provide lasting protection.
- Install continuous metal flashing at all junctions between the façade and the building envelope. Overlap sections by at least 100 mm and seal seams with high‑temperature silicone or polyurethane sealant rated for exterior use.
- Fit mesh screens with an aperture no larger than 6 mm over every vent opening, including air intake louvers, drainage holes, and maintenance access panels. Stainless‑steel or galvanized hardware resists corrosion and chewing.
- Apply a closed‑cell spray foam or expanding polyurethane sealant around penetrations for utilities, fasteners, and anchor bolts. Expandable material fills gaps to 2 mm or less, eliminating hiding places for rodents.
- Use metal or composite cladding that does not present gaps at joints. Where wood or composite components are unavoidable, wrap edges with metal edge protectors and secure with corrosion‑resistant screws.
- Incorporate a drip edge and a sloped sill at the base of the façade to prevent water accumulation, which attracts rodents. Install a stainless‑steel sweep that contacts the building surface and blocks crawling.
- Conduct regular visual inspections at least twice yearly. Look for gnaw marks, droppings, or displaced sealant, and repair any breach promptly.
Additional strategies enhance deterrence:
- Install ultrasonic repellent devices within the cavity, ensuring they are weather‑proof and positioned away from HVAC components.
- Place non‑toxic rodent‑repellent granules (e.g., peppermint oil or capsaicin‑based) along the perimeter of the cavity, reapplying according to manufacturer guidelines.
- Maintain a clear zone of at least 1 m around the façade, removing vegetation, debris, and stored materials that could serve as shelter.
By combining mechanical barriers, appropriate sealing materials, and routine maintenance, a ventilated façade can be rendered effectively impervious to mouse intrusion.