Instructions / Assembly

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ATTACHMENT AND SUPPORT
Fasteners
General Fastener Guidance
Without proper attachment, the thermal performance of the continuous insulation is compromised. Fasteners function to keep insulation

material receiving the attachment.
For wood framing or sheathing, exterior grade
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(stainless steel or galvanized) screws or impaling pins are recommended. For steel
framing, exterior grade steel fasteners are recommended. For concrete or masonry, masonry anchors or fasteners are recommended.
To mitigate the risk of adhesive-based failure, the use of adhesive-based fasteners should be limited to temporary attachment.
It is generally recommended to utilize a minimum 2-inch washer and ensure the fastener penetrates a minimum 1-inch into the receiving
stud or structural material. In general, nails are not recommended for use with insulation greater than 4 inches thick.

fasteners are recommended for long-term performance of insulation and to mitigate the risk of adhesive-based failure.
NOTE:
®
RainBarrier
®

®
Impasse
®

®
RainBarrier
®
Clips are proprietary fasteners that can be utilized. TRUFAST
®
Walls
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produces a line of
specialty fasteners for mineral wool, such as their Thermal-Grip
®
Impaling Fastener and Grip-Lok
®
MW Plate.
Other Considerations
Numerous other project factors should be considered by the architect or engineer of record, such as static loads, wind loads, seismic
loads, and all combined loads.
It is always good practice to check with the exterior cladding manufacturer if they have any special attachment requirements due to load
factors or other performance requirements.
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Fasteners used to attach the cladding support materials through the mineral wool continuous insulation should be exterior grade, stainless steel or galvanized, and tested per
ASTM B117, to ensure long-term durability in an exterior environment. Ensure the fastener is compatible with both the cladding support materials and the cladding.
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TRUFAST
®
Walls is a division of Altenloh, Brinck & Co. U.S., Inc. Please visit www.trufast.com for more information.