There is an alternative to scaffold sheeting for temporary weather protection or exterior containment of a work area in construction — shrink wrap. What makes it unique is the way it moulds into a structure or building. Read on to learn the basics of shrink wrap, including its material composition, working principle, and more.
What Is Shrink Wrap Sheeting?
Shrink wrap sheeting is a heavy-duty film often seen on scaffolding at construction sites. It’s usually white, does not flap in the wind, and has no small holes in the sheets. The containment and protection it provide are necessary against the unpredictable UK weather, which can often delay construction projects. Overall, shrink wrap is a resourceful way to nip issues in the bud before they arise.
What Are Shrink Wrap Sheets Made Of?
Shrink wrap can be made from various plastic materials, with four common types being PVC, polyolefin, polyethylene, and polypropylene. Polyethylene and polypropylene are particularly popular and are often used for heavier shrink-wrapping applications.
Moreover, shrink wrap has additives specifically designed for shrinking when heat is applied. Manufacturers like SP Group include additional additives, such as fire-resistant agents, for improved protection.
An example to highlight is our Scafwrap FR Shrink Wrap. It’s a scaffold protection designed for professional users who need to achieve the best results in the toughest weather conditions. The material contains UV and fire-resistant additives that extinguish fire within seconds. This product also conforms to EN 13501-1:2007 + A1:2010 standards and has Warrington Certifire certification. All these fantastic features, plus consistent quality between rolls!
How Does Shrink Wrap Work?
Shrink wrap is applied to scaffolding using a heat weld tool like this shrink gun with regulator and hose. When subject to heat, shrink wrap sheeting undergoes a process, also called biaxial shrinking, where it shrinks in every direction. This creates a taut covering that can withstand even the harshest weather conditions. Trained operatives start from the bottom and work their way up in one continuous motion.
Once heated, the material becomes drum-tight, which prevents any flapping in high winds and makes it virtually impossible to break through. This high level of protection and resistance is due to the additives in the material, which allow it to contract without melting through the plastic.
Additionally, because the sheets are joined by heat welding, it’s possible to create a ‘continuously bonded skin’ over even the largest or most awkwardly shaped scaffolds, without the holes or gaps of traditional sheeting.
Reminders For Applying Shrink Wrap to Scaffolding
Instructions for applying shrink wrap can vary depending on the brand and manufacturer.
Generally, only qualified and trained operatives should install shrink wrap to ensure proper application and safety. It is important to avoid applying shrink wrap in winds exceeding 20 mph, as strong winds can affect the evenness of the application and cause issues.
Wearing heatproof leather gloves or gauntlets is recommended for protection during the heat shrinking process. If any holes appear, they should be covered with shrink wrap patch tape.
For more information on scaffold protection, shrink wrap, scaffold sheeting, or monarflex alternative, contact us at +44 (028) 9442 8611. SP Group is a scaffold supplier based in UK and Ireland.