Thermoplastic Olefin, also known as TPO, is a single-ply roofing membrane for flat roofs. It is one of the fastest-growing roofing solutions in Pakistan. TPO membranes are manufactured in sheets, with their size ranging from 10, 12, or 20 ft. wide. Following are some types of TPO roofing membranes:

  • Polyisocyanurate
  • Expanded Polystyrene
  • Extruded Polystyrene

TPO membranes are available in three distinct colors: White, Grey, and Tan. Also, these coverings are recyclable. They do not contain plasticizers.

Installation of TPO Membranes

Before membrane installation, experts ensure that adequate tools and machinery are in possession. There are two ways to prepare your roof:

  • Remove the present top
  • Clean the substrate

Clean the roof and keep it dry before applying an underlayment or roof cover; moisture can cause degradation and mold growth with time. TPO membranes can sustain thermal shocks and movement; the coverings can be used for various roof configurations, such as mechanically blasted or attached.

N.B. Leave shingles or other materials in place (if not cracked).

An inch-thick of polyiso foam works for most roofs. Cut insulation to fit around pipes, vents, or other structures. Using one strip at a time, set your TPO (at square position) to a corner before smoothening it. The edges should be fastened at a distance of 8” to 1 ft.

Professionals carry a heat-welding tool to install TPO roofs. Heat-welding seams will connect side-by-side panels to ensure a water-tight seal. Also, seal any vent edges on the roof. Apply TPO to walls that cross the roof deck; use an adhesive for a secure seal.

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TPO Membranes – The Future of Roof Waterproofing

According to research, TPO membranes are bound to last for 25 years or more. Because of the high demand for energy efficiency, TPO is one of the fastest-growing roof membranes (with respect to sales). It is known for its solar reflective capabilities. If you are seeking an eco-friendly and long-lasting option, opt for TPO.

The global sales for TPO roof membranes (for residential buildings) have increased significantly during the periods of 2022-28. High-demand regions for TPO membranes include:

  • Europe
  • North America
  • Middle East
  • South America
  • Asia

Properties of TPO Membranes

  • Standard thickness: 45-mil, 60-mil, and 80-mil
  • Beneficial for low-slope and flat roofs
  • Energy-efficient
  • Light colors
  • High UV and puncture resistance
  • Prolonged life span
  • Cost-effective

How to Repair TPO Membranes?

  1. Membrane Preparation

Prior to fixing a repair, the TPO membrane needs to be cleaned with soap and water. Afterwards, you can use a solvent cleaner. Normally, TPO manufacturers recommend patch repairs to the underside of the membrane as managing the top surface would not be easy.

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  1. Patch-Free Repairs

TPO membranes possess a polymer content of 30-60%, which, resulting in any damage would need a patch to cover it. It has a standard size of 200mm x 200mm; it is placed on the top or the underside of the membrane. However, this solution can have negative effects if not applied correctly. Modern users want a patch-free repair (covering the area with large overlays).

  1. Use of Light Stabilizers

To keep away minor ruptures and imperfections being developed in the TPO membrane, manufacturers use stabilizers, such as Chimassorb. The stabilizer should be compatible with other adhesives and formulations. Moreover, it should be heat-complaint.

The waterproofing industry has taken huge strides in developing new methods and technologies, all of which are available for clients around the globe. If you wish to acquire a TPO membrane for your roof, contact Sky Chemical Services, the best company for waterproofing projects in Karachi, Pakistan.

Besides roof waterproofing, we offer basement, foundation, wall, and bathroom waterproofing as well. To book an appointment, call or email us today!

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