The Most Significant Issue With Secondary Glazing Acrylic Options And How You Can Resolve It

· 5 min read
The Most Significant Issue With Secondary Glazing Acrylic Options And How You Can Resolve It

Improving Home Efficiency: A Comprehensive Guide to Secondary Glazing Acrylic Options

In an age where energy costs are increasing and environmental sustainability is a primary issue for property owners, the search for efficient insulation services has actually magnified. While double glazing is typically promoted as the gold requirement for window insulation, it is not always a viable alternative due to high costs, structural limitations, or the restrictive guidelines surrounding heritage and listed structures. This is where secondary glazing serves as a flexible and affordable alternative.

Specifically, acrylic secondary glazing has actually become a frontrunner for those looking for a balance between efficiency, price, and ease of setup. This post explores the various acrylic options available, the benefits of selecting this material, and how it compares to other glazing options.


What is Acrylic Secondary Glazing?

Secondary glazing involves the setup of a supplemental pane of glass or plastic inside an existing window frame. Unlike complete window replacement, this approach maintains the original outside window while producing an insulating layer of air in between the two panes.

Acrylic, scientifically referred to as PolyMethyl Methacrylate (PMMA), is a transparent thermoplastic often used as a lightweight and shatter-resistant alternative to glass. It is often marketed under brand such as Perspex or Plexiglass. Due to the fact that it is extremely adaptable and provides excellent clarity, it has ended up being the favored product for DIY secondary glazing jobs and professional retrofitting alike.

The Different Types of Acrylic Sheets for Glazing

When picking acrylic for secondary glazing, it is very important to comprehend that not all sheets are made equally. The choice of product effects the window's durability, clearness, and insulation homes.

  1. Extruded Acrylic: This is the most cost-effective option. It is manufactured by pressing the plastic through a kind. It has a lower melting point and is much easier to laser-cut, making it ideal for standard domestic window sizes.
  2. Cast Acrylic: Known for its superior quality, cast acrylic is made by putting liquid ingredients into a mold. It offers much better thermal stability and is less most likely to scratch or warp with time compared to extruded variations.
  3. UV-Resistant Acrylic: Standard acrylic currently uses some UV defense, however specialized UV-resistant sheets are created to block approximately 99% of hazardous rays, preventing the fading of interior carpets, furniture, and art work.
  4. Abrasion-Resistant Acrylic: This type features a hard-coated surface area that safeguards the sheet from scratches and chemical damage, guaranteeing the glazing remains clear even after years of cleansing.

Comparing Glazing Materials

To comprehend why acrylic is a beneficial choice, it is helpful to compare it against other typical materials utilized in secondary glazing, such as polycarbonate and traditional glass.

FunctionAcrylic (PMMA)PolycarbonateRequirement Glass
TransparencyExcellent (92%)Good (88%)Excellent (90%)
Weight50% lighter than glass50% lighter than glassHeavy
Effect Resistance10x more powerful than glass250x more powerful than glassLow/ Fragile
Thermal InsulationHighHighModerate
CostAffordablePremiumHigh (for retrofitting)
Scratch ResistanceModerateLowHigh
Relieve of DIYHighHighLow

Secret Benefits of Acrylic Secondary Glazing

The shift toward acrylic secondary glazing is driven by a number of practical advantages. For lots of house owners, the choice is based on three primary factors: thermal efficiency, acoustic insulation, and cost.

1. Thermal Efficiency and Heat Retention

Acrylic is a naturally insulating material. When set up as secondary glazing, it creates a stationary air pocket that serves as a thermal barrier. This minimizes "U-values" (the rate of heat transfer), indicating the home stays warmer in the winter and cooler in the summertime.  visit website  decreased dependence on heating & cooling systems causes substantial decreases in annual energy expenses.

2. Acoustic Insulation (Noise Reduction)

For citizens living near busy roadways, airports, or rail lines, sound pollution is a significant issue. Acrylic is often denser than thin glass panes discovered in older windows. When a space of around 100mm to 150mm is kept between the primary window and the acrylic sheet, the system can minimize external sound levels by as much as 80%.

3. Safety and Durability

Acrylic is essentially unbreakable. Unlike glass, which can burglarize unsafe fragments upon impact, acrylic is highly resistant to force. This makes it a perfect choice for families with children or family pets. In addition, its light-weight nature puts less tension on existing window frames and makes the installation procedure much safer for a bachelor to deal with.

4. Aesthetics and Preservation

One of the best benefits for owners of historic or noted homes is that acrylic secondary glazing is "discreet and reversible." It does not alter the external look of the building, satisfying most local preparation authorities. The high transparency of acrylic makes sure that the view stays unblocked.


Setup Methods for Acrylic Glazing

One reason acrylic is so popular is the range of installation methods available, varying from short-lived seasonal repairs to long-term components.

  • Magnetic Strip Systems: This is the most common DIY technique. Magnetic tape is used to the window frame and the edge of the acrylic sheet. This allows the pane to be easily removed for cleansing or during the summer season when ventilation is required.
  • Plastic Clips and Turnbuttons: Small clips are screwed into the window surround to hold the acrylic sheet securely in location. This is a safe and secure technique that still permits seasonal removal.
  • Screw-in Frames: For a more permanent service, acrylic sheets can be mounted within a slim aluminum or PVC frame that is then screwed into the window expose.
  • Adhesive Tape: While the least expensive option, utilizing high-bond double-sided tape is usually prevented for long-lasting usage as it makes removing the sheet for window upkeep tough.

Maintenance and Care

To ensure the longevity of acrylic secondary glazing, proper maintenance is essential. Acrylic is softer than glass and can be scratched if dealt with incorrectly.

  • Cleansing Agents: Never utilize window cleaners consisting of ammonia or alcohol (like Windex), as these can "fad" (develop small cracks) or cloud the surface of the acrylic. Rather, use lukewarm water with a mild dish soap.
  • Fabric Selection: Only use soft microfiber fabrics. Paper towels or abrasive sponges can leave fine scratches that dull the openness in time.
  • Fixed Management: Acrylic can bring in dust due to static electricity. Utilizing an anti-static cleaner specifically developed for plastics can help keep the sheets cleaner for longer.

Often Asked Questions (FAQ)

Q: Does acrylic secondary glazing cause condensation?A: Secondary glazing is really designed to decrease condensation on the main window by keeping the inner surface area warmer. Nevertheless, if the seal isn't ideal, some wetness may get trapped. Including a little sachet of desiccant or making sure the space is well-ventilated can alleviate this.

Q: Is acrylic or polycarbonate much better for windows?A: For secondary glazing, acrylic is generally much better due to the fact that it is more UV-resistant and uses higher clearness. Polycarbonate is more powerful however is more prone to scratching and can yellow in time if not treated with pricey finishes.

Q: What density of acrylic should I use?A: For many domestic windows, a density of 3mm or 4mm is sufficient. For very big windows or where maximum soundproofing is required, 5mm or 6mm may be better.

Q: Can I install this on listed buildings?A: Generally, yes. Because secondary glazing is an internal addition and does not alter the fabric of the structure's outside, it is typically permitted. However, it is always suggested to contact your local planning workplace initially.

Q: How much cash can I minimize energy costs?A: While outcomes vary based upon the residential or commercial property, homeowners can typically expect to see a 10% to 15% decrease in heat loss through windows, which associates considerably to lower heating expenses.


Acrylic secondary glazing represents a high-performance, accessible, and visually pleasing option for modern-day home insulation needs. By using the clarity of glass with the toughness and thermal homes of contemporary polymers, it permits property owners to upgrade their living environment without the expense or intrusion of full window replacements. Whether the goal is to reduce energy expenses, obstruct out street sound, or safeguard a heritage home, acrylic choices offer a versatile course toward a more comfortable and effective home.