13 Things You Should Know About Secondary Glazing Acrylic Options That You Might Not Have Considered

· 5 min read
13 Things You Should Know About Secondary Glazing Acrylic Options That You Might Not Have Considered

Enhancing Home Comfort: A Comprehensive Guide to Secondary Glazing Acrylic Options

Windows are frequently the most considerable source of heat loss and sound infiltration in houses. While replacing original windows with double glazing is a common option, it is not constantly possible-- particularly in heritage buildings or for house owners on a stringent spending plan. As an option, secondary glazing has ended up being an increasingly popular solution. Amongst the numerous materials offered, acrylic sheets have emerged as a frontrunner.

This article explores the numerous acrylic options for secondary glazing, comparing them to traditional glass and detailing the benefits, installation methods, and maintenance required to maintain a more energy-efficient and quieter home.


Understanding Secondary Glazing

Secondary glazing involves the installation of a discrete, additional internal window to an existing single-glazed window. Unlike total replacement, it leaves the external structure of your house unblemished. This makes it a preferred choice for "Listed Buildings" or homes in sanctuary where planning approval for brand-new uPVC or double-glazed windows is typically rejected.

Secondary glazing works by creating a pocket of still air in between the original window and the secondary pane. This "buffer zone" acts as an effective insulator, reducing thermal transfer and moistening external sound.

Why Choose Acrylic Over Glass?

When picking materials for secondary glazing, the 2 primary choices are glass and plastic (acrylic or polycarbonate). While glass is standard, acrylic offers a number of benefits that make it especially ideal for DIY tasks and older frames.

Table 1: Acrylic vs. Traditional Glass for Secondary Glazing

FeatureAcrylic (Perspex/Plexiglass)Standard Glass
Weight50% lighter than glassHeavy; needs strong frames
Effect Resistance10-- 15 times more powerful than glassFragile and vulnerable to shattering
Thermal InsulationOutstanding (Lower thermal conductivity)Moderate
Clearness92% Light transmission (Clearer than glass)Varies (Can have a green tint)
Ease of InstallationReally high (DIY friendly)Professional setup frequently required
UV ResistanceHigh (with UV-stabilized grades)Naturally high
CostUsually more budget friendlyGreater product and labor expenses

Types of Acrylic Sheets for Secondary Glazing

Not all acrylic is developed equivalent. To accomplish the very best outcomes, house owners must comprehend the variations offered on the market.

1. Extruded Acrylic

Extruded acrylic is the most cost-efficient option. It is produced by pressing the acrylic mass through a die. While it is outstanding for basic secondary glazing, it has a little greater tolerances in density and is a bit more prone to chemical tension than cast acrylic.

2. Cast Acrylic

Cast acrylic is produced by putting the liquid active ingredients into a mold. This results in a much more difficult, more stable material with exceptional optical clarity. For large windows where visual distortion must be minimized, cast acrylic is the premium option.

3. UV-Stabilized Acrylic

Standard acrylic is naturally resistant to yellowing, but UV-stabilized alternatives are specifically crafted for windows that deal with direct, extreme sunlight. These sheets ensure that the material remains crystal clear for decades without devenir brittle.

4. Abrasion-Resistant Acrylic

One of the main disadvantages of acrylic is its susceptibility to scratches. Abrasion-resistant (or "hard-coated") acrylic features a thin, ceramic-like finishing that protects the surface from scuffs and cleaning-related scratches, making it ideal for high-traffic areas.


Key Benefits of Acrylic Secondary Glazing

Thermal Performance and Energy Savings

The primary motivation for secondary glazing is heat retention. Acrylic has lower thermal conductivity than glass, meaning it is naturally better at preventing heat from getting away. By installing a 3mm or 4mm acrylic sheet, a family can substantially lower its U-value (the rate of heat loss), resulting in lower energy expenses and a smaller sized carbon footprint.

Acoustic Insulation (Noise Reduction)

Acrylic is extremely efficient at lowering high-frequency sounds, such as traffic or neighborhood chatter. Due to the fact that acrylic is less rigid than glass, it does not vibrate at the exact same frequencies, helping to separate sound waves before they enter the space. For optimum noise decrease, an air space of 100mm to 200mm between the main window and the acrylic pane is suggested.

Health and Condensation Control

Condensation happens when warm, damp air hits a cold window surface area. By providing an internal barrier, acrylic secondary glazing keeps the inner surface area of the "window" warmer, which substantially minimizes the likelihood of condensation. This, in turn, prevents the growth of black mold, which can have destructive results on breathing health.


Setup Methods for Acrylic Secondary Glazing

Among the reasons house owners prefer acrylic is the range of non-permanent installation options offered.

Table 2: Common Installation Methods

MethodBest ForDescription
Magnetic StripsRelieve of removalUtilizing self-adhesive magnetic tape on the window frame and the acrylic sheet. This permits quick removal in summer season.
Clip & & Screw SystemIrreversible stabilityPlastic clips or turn-buttons hold the sheet versus a foam seal. More protected for bigger, much heavier panes.
U-Channel EdgingLooksA plastic or aluminum channel is mounted to the frame, and the acrylic sheet slides or clips into it.
Adhesive VelcroBudget plan DIYInexpensive service using hook-and-loop fasteners. secondary glazing installer in luton than magnetic or clip systems.

Step-by-Step Selection Guide

To make sure the very best results, one should follow these actions when choosing their acrylic secondary glazing:

  1. Measure Accurately: Measure the height and width of the window recess. It is normally suggested to deduct 3mm from each side to enable thermal growth.
  2. Identify Thickness:
  • 3mm: Standard for little to medium windows.
  • 4mm-5mm: Better for big windows to prevent "bowing."
  1. Pick the Finish: While "Clear" is standard, "Frosted" acrylic can be used for restroom secondary glazing to provide privacy without compromising light.
  2. Select the Fixing System: Ensure the picked repairing technique can support the weight of the sheet size.

Maintenance and Care for Acrylic Sheets

To maintain the durability and clearness of acrylic secondary glazing, particular cleansing procedures must be followed.

  • Avoid Harsh Chemicals: Never utilize glass cleaners including ammonia or alcohol (like Windex), as these can "fad" or cloud the acrylic.
  • Use Soft Cloths: Microfiber or soft cotton cloths are important. Prevent paper towels, which can be abrasive.
  • Moderate Soaps: A simple service of lukewarm water and a drop of moderate dish soap is typically sufficient.
  • Anti-Static Treatments: Using an anti-static cleaner can help prevent the acrylic from attracting dust, which prevails with plastic surfaces.

Frequently Asked Questions (FAQ)

1. Does acrylic secondary glazing stop condensation?

Yes. By creating a thermal barrier, the internal secondary pane stays closer to space temperature level, preventing the warm air in the room from condensing on the cold primary glass.

2. Can I still open my windows?

If using magnetic or clip-on systems, the acrylic sheet can be quickly eliminated or reserved to permit the main window to be opened. For sash windows, moving secondary glazing systems are offered, though these typically involve a frame.

3. Is acrylic much better than polycarbonate?

Acrylic is more UV-resistant and uses much better clearness (it does not have the small yellow/grey tint often discovered in polycarbonate). Nevertheless, polycarbonate is essentially unbreakable, making it much better for high-security applications or locations vulnerable to heavy effects.

4. How long does acrylic secondary glazing last?

High-quality UV-stabilized acrylic can last 10 to 20 years without significant yellowing or destruction, provided it is cleaned up correctly.

5. Will it look apparent from the exterior?

One of the primary benefits of secondary glazing is its low visual impact. Since the acrylic is clear and installed inside, it is rarely noticeable from the exterior of the property.


Acrylic secondary glazing represents a flexible, affordable, and highly efficient method to update home insulation. Whether the goal is to reduce heating expenses, moisten the noise of a hectic street, or secure a historical home from the components, acrylic deals a lightweight and DIY-friendly alternative to traditional glass. By choosing the best grade of product and a proper setup method, house owners can enjoy a warmer, quieter, and more comfortable living environment without the expense of overall window replacement.