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Using Backer Rods for Weatherproofing

July 28, 2023

As a contractor, imagine investing months of hard work and a steady flow of cash into constructing a building only to have water seeping in through cracks. Water and moisture seeping in through such gaps can terribly damage the aesthetics and the structural integrity of buildings. This is why weatherproofing is considered to be a crucial aspect of construction. Thankfully, backer rods, also known as foam rods, can be effectively used to weatherproof buildings with ease. In this blog, we list different ways how foam rods are used for weatherproofing all types of buildings.


Weatherproofing with Backer Rod


  • When it comes to protecting your home from the elements, weatherproofing is key. And one tool that can make a big difference in keeping your home safe and secure is the backer rod. This flexible foam material is used to fill gaps and cracks around windows, doors, and other openings in your home. By filling these gaps, the backer rod prevents water and moisture from seeping into your home, which can lead to drafts, leaks, and even mould growth.
  • These foam rods are also used as backing material for caulking. These absorbent rods create an effective backing, thus reducing the need for a large amount of caulking. These rods also ensure that there are no air bubbles or vacuum where water can be stored.


The backer rod is a versatile and effective solution for weatherproofing and increasing energy efficiency in your home or building. By filling gaps and cracks with backer rods, you can prevent air leakage, water intrusion, and energy loss. Not only does the soft rod provide a barrier against the elements, but it also helps to reduce noise transmission and improve indoor comfort. Alcot Plastics Ltd. is a leading manufacturer and supplier of polyethylene foam products including soft rods and screening splines. Contact us today to learn about everything we can do for you.