Can Secondary Glazing Acrylic Options Always Rule The World?

· 5 min read
Can Secondary Glazing Acrylic Options Always Rule The World?

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

In an age where energy expenses are increasing and ecological sustainability is a main issue for property owners, the search for efficient insulation solutions has magnified. While double glazing is frequently promoted as the gold requirement for window insulation, it is not always a feasible alternative due to high costs, structural restrictions, or the limiting guidelines surrounding heritage and listed structures. This is where secondary glazing functions as a flexible and economical option.

Particularly, acrylic secondary glazing has emerged as a frontrunner for those looking for a balance between performance, cost, and ease of setup. This post explores the different acrylic choices available, the benefits of selecting this product, and how it compares to other glazing options.


What is Acrylic Secondary Glazing?

Secondary glazing includes the installation of a supplemental pane of glass or plastic inside an existing window frame. Unlike full window replacement, this method protects the initial exterior window while creating an insulating layer of air between the two panes.

Acrylic, scientifically called PolyMethyl Methacrylate (PMMA), is a transparent thermoplastic often used as a lightweight and shatter-resistant alternative to glass. It is frequently marketed under brand name names such as Perspex or Plexiglass. Since it is highly versatile and provides outstanding clearness, it has actually ended up being the preferred product for DIY secondary glazing jobs and expert retrofitting alike.

The Different Types of Acrylic Sheets for Glazing

When selecting acrylic for secondary glazing, it is necessary to comprehend that not all sheets are manufactured equally. The choice of product impacts the window's longevity, clarity, and insulation properties.

  1. Extruded Acrylic: This is the most cost-effective alternative. It is manufactured by pushing the plastic through a kind. It has a lower melting point and is much easier to laser-cut, making it perfect for basic residential window sizes.
  2. Cast Acrylic: Known for its superior quality, cast acrylic is made by pouring liquid ingredients into a mold. It offers better thermal stability and is less most likely to scratch or warp in time compared to extruded variations.
  3. UV-Resistant Acrylic: Standard acrylic currently uses some UV defense, however specialized UV-resistant sheets are designed to obstruct approximately 99% of damaging rays, preventing the fading of interior carpets, furniture, and artwork.
  4. Abrasion-Resistant Acrylic: This type includes a hard-coated surface area that protects the sheet from scratches and chemical damage, ensuring the glazing stays clear even after years of cleaning.

Comparing Glazing Materials

To comprehend why acrylic is a beneficial option, it is handy to compare it versus other common materials used in secondary glazing, such as polycarbonate and standard glass.

FeatureAcrylic (PMMA)PolycarbonateRequirement Glass
OpennessExcellent (92%)Good (88%)Excellent (90%)
Weight50% lighter than glass50% lighter than glassHeavy
Effect Resistance10x stronger than glass250x stronger than glassLow/ Fragile
Thermal InsulationHighHighModerate
CostAffordablePremiumHigh (for retrofitting)
Scratch ResistanceModerateLowHigh
Ease of DIYHighHighLow

Key Benefits of Acrylic Secondary Glazing

The shift toward acrylic secondary glazing is driven by a number of functional benefits. For lots of property owners, the decision is based on three primary aspects: thermal performance, acoustic insulation, and expense.

1. Thermal Efficiency and Heat Retention

Acrylic is a naturally insulating product. When set up as secondary glazing, it produces a stationary air pocket that acts as a thermal barrier. This reduces "U-values" (the rate of heat transfer), implying the home remains warmer in the winter and cooler in the summertime. This decreased reliance on heating and cooling systems leads to substantial reductions in yearly energy expenses.

2. Acoustic Insulation (Noise Reduction)

For homeowners living near busy roads, airports, or railway, noise pollution is a substantial concern. Acrylic is frequently denser than thin glass panes discovered in older windows. When a gap of roughly 100mm to 150mm is kept between the main window and the acrylic sheet, the system can lower external noise levels by up to 80%.

3. Safety and Durability

Acrylic is practically unbreakable. Unlike glass, which can break into unsafe fragments upon impact, acrylic is extremely resistant to force. This makes it a perfect option for homes with children or pets. Moreover, its light-weight nature puts less tension on existing window frames and makes the installation procedure much more secure for a single individual to manage.

4. Aesthetic appeals and Preservation

One of the biggest advantages for owners of historical or listed residential or commercial properties is that acrylic secondary glazing is "discreet and reversible." It does not alter the external appearance of the building, satisfying most regional planning authorities.  secondary double glazing near wickford  of acrylic makes sure that the view stays unobstructed.


Installation Methods for Acrylic Glazing

One reason acrylic is so popular is the range of installation techniques readily available, varying from temporary seasonal repairs to permanent fixtures.

  • Magnetic Strip Systems: This is the most typical DIY approach. Magnetic tape is applied to the window frame and the edge of the acrylic sheet. This enables the pane to be quickly gotten rid of for cleaning or throughout the summer months when ventilation is needed.
  • Plastic Clips and Turnbuttons: Small clips are screwed into the window surround to hold the acrylic sheet securely in place. This is a protected technique that still enables for seasonal elimination.
  • Screw-in Frames: For a more long-term solution, acrylic sheets can be mounted within a slim aluminum or PVC frame that is then screwed into the window reveal.
  • Adhesive Tape: While the cheapest option, utilizing high-bond double-sided tape is typically dissuaded for long-term use as it makes eliminating the sheet for window upkeep difficult.

Maintenance and Care

To guarantee the durability of acrylic secondary glazing, correct maintenance is necessary. Acrylic is softer than glass and can be scratched if treated incorrectly.

  • Cleaning Agents: Never use window cleaners including ammonia or alcohol (like Windex), as these can "trend" (develop small fractures) or cloud the surface area of the acrylic. Rather, use lukewarm water with a moderate dish soap.
  • Cloth Selection: Only use soft microfiber cloths. Paper towels or abrasive sponges can leave great scratches that dull the transparency in time.
  • Static Management: Acrylic can draw in dust due to fixed electrical energy. Using an anti-static cleaner particularly designed for plastics can assist keep the sheets cleaner for longer.

Regularly Asked Questions (FAQ)

Q: Does acrylic secondary glazing cause condensation?A: Secondary glazing is in fact designed to minimize condensation on the primary window by keeping the inner surface warmer. However, if the seal isn't perfect, some wetness may get caught. Including a little sachet of desiccant or guaranteeing the room is well-ventilated can mitigate this.

Q: Is acrylic or polycarbonate much better for windows?A: For secondary glazing, acrylic is typically better since it is more UV-resistant and provides higher clearness. Polycarbonate is more powerful however is more vulnerable to scratching and can yellow gradually if not treated with costly finishes.

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

Q: Can I install this on listed structures?A: Generally, yes. Since secondary glazing is an internal addition and does not change the fabric of the building's outside, it is generally permitted. Nevertheless, it is always recommended to talk to your regional planning workplace initially.

Q: How much money can I save money on energy bills?A: While results differ based upon the residential or commercial property, homeowners can usually expect to see a 10% to 15% reduction in heat loss through windows, which associates considerably to lower heating costs.


Acrylic secondary glazing represents a high-performance, available, and visually pleasing option for modern-day home insulation requirements. By offering the clarity of glass with the toughness and thermal properties of contemporary polymers, it allows house owners to update their living environment without the expense or invasion of complete window replacements. Whether the objective is to lower energy costs, obstruct out street sound, or secure a heritage residential or commercial property, acrylic choices provide a flexible course towards a more comfy and effective home.