What type of staple gun is used to secure insulation jackets and facings?

• A. Manual staple gun
• B. Pneumatic coil stapler
• C. Single bound curved type
• D. Double bound straight type

Answer: (D)

The key idea here is matching the tool to the job: you need a staple gun that drives straight staples with a strong grip to hold insulation jackets and facings securely in place on flat surfaces. A double bound straight type uses double-bound staples that bite firmly and resist pull-out, which is essential for fastenings like foil or kraft facing that can loosen if the staple lacks retention. That combination—straight driving for clean, uniform insertion and double-binding for secure hold—makes it the best choice for securing jackets and facings. A manual staple gun can be weak for repetitive work, a pneumatic coil stapler is more heavy‑duty than needed and can risk over-penetration, and a single bound curved type is better suited for curved surfaces rather than flat installations, where straight alignment and strong hold are important.