Windows/Door/Timber & Steel Frame Flashings

Masons 40 Below™ Flex Flashing Tape and Masons Corner Guards must be installed in accordance with the installation instructions downloadable from this page. Please also note:

• Ensure the 40 Below Flex Tape completely covers the joinery opening
• To ensure maximum adhesion of the tape, make sure the substrate surface is clean, dry, and free from any dust or other contaminants. Flaps are folded into the opening and secured
• The building wrap is installed as shown to the exterior face of the frame. A window and door openings are cut at a 45˚ angle away from each corner, then the flaps are folded into the opening and secured
• 40 Below™ Flex Flashing Tape must not be stretched. When joining 2 sections of tape, overlap by 100mm or more
• Compatible with most building sealants, check suitability with sealant manufacturers. Alternatively, do a patch test before use.

Rigid Air Barriers

• 40 Below Flex is tested and approved for sealing the joints on Rigid Barriers. Tested and approved for use with BGC Durrabarrier and OS’BraceRAP

• Compatible with most building sealants – check suitability with sealant manufactures. Alternatively, do a patch test before use

NB. Masons 40 Below Flex Flashing Tape and Masons Corner Guards must be installed in accordance with the installation instructions found in our Document Downloads button on this page.

• For a risk score between 0-20 in accordance with NZBC Acceptable Solution E2/AS1 - PASS
• B2 Durability, E2 External Moisture, and F2 Hazardous Materials. Reliable adhesion -10˚C to +40˚C
• NZS3604 Building Wind Zones up to and including ‘Extra High’ AS/NZS 4201.4:1994
• Tested to ASTM D3330 for adhesion and AAMA-711.5.21 for nail and screw sealability.

Masons Building Products has been in the industry for over 20 years. Customer satisfaction is paramount. A dedicated team of Masons Representatives cover NZ nationwide to assist and instruct customers in using Masons products.