The Biggest Issue With Secondary Glazing Acrylic Options And How You Can Fix It

· 5 min read
The Biggest Issue With Secondary Glazing Acrylic Options And How You Can Fix It

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

Windows are often the most considerable source of heat loss and noise infiltration in residential homes. While changing original windows with double glazing is a common option, it is not constantly feasible-- specifically in heritage buildings or for house owners on a stringent budget plan. As an option, secondary glazing has ended up being an increasingly popular solution. Among the various products offered, acrylic sheets have actually emerged as a frontrunner.

This post checks out the numerous acrylic choices for secondary glazing, comparing them to traditional glass and detailing the advantages, setup approaches, and upkeep needed to keep a more energy-efficient and quieter home.


Comprehending Secondary Glazing

Secondary glazing involves the installation of a discrete, supplementary internal window to an existing single-glazed window. Unlike complete replacement, it leaves the external structure of your home untouched. This makes it a favored choice for "Listed Buildings" or residential or commercial properties in sanctuary where preparation authorization for new uPVC or double-glazed windows is frequently denied.

Secondary glazing works by producing a pocket of still air between the original window and the secondary pane.  windowsanddoors-r-us " serves as an effective insulator, minimizing thermal transfer and moistening external sound.

Why Choose Acrylic Over Glass?

When choosing products for secondary glazing, the two main options are glass and plastic (acrylic or polycarbonate). While glass is conventional, acrylic deals numerous advantages that make it particularly appropriate for DIY jobs and older frames.

Table 1: Acrylic vs. Traditional Glass for Secondary Glazing

FeatureAcrylic (Perspex/Plexiglass)Standard Glass
Weight50% lighter than glassHeavy; requires strong frames
Effect Resistance10-- 15 times more powerful than glassFragile and vulnerable to shattering
Thermal InsulationExceptional (Lower thermal conductivity)Moderate
Clearness92% Light transmission (Clearer than glass)Varies (Can have a green tint)
Ease of InstallationExtremely high (DIY friendly)Professional installation typically required
UV ResistanceHigh (with UV-stabilized grades)Naturally high
CostNormally more affordableGreater product and labor costs

Kinds Of Acrylic Sheets for Secondary Glazing

Not all acrylic is produced equal. To achieve the best results, property owners should comprehend the variations readily available on the market.

1. Extruded Acrylic

Extruded acrylic is the most economical choice. It is manufactured by pressing the acrylic mass through a die. While it is excellent 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 pouring the liquid components into a mold. This leads to a much more difficult, more steady material with remarkable optical clarity. For large windows where visual distortion must be reduced, cast acrylic is the premium option.

3. UV-Stabilized Acrylic

Basic acrylic is naturally resistant to yellowing, however UV-stabilized options are particularly engineered for windows that deal with direct, extreme sunlight. These sheets guarantee that the material remains crystal clear for years without devenir brittle.

4. Abrasion-Resistant Acrylic

One of the primary downsides of acrylic is its vulnerability to scratches. Abrasion-resistant (or "hard-coated") acrylic features a thin, ceramic-like coating that secures the surface area 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 inspiration for secondary glazing is heat retention. Acrylic has lower thermal conductivity than glass, indicating it is naturally much better at avoiding heat from escaping. By setting up a 3mm or 4mm acrylic sheet, a family can significantly lower its U-value (the rate of heat loss), causing lower energy bills and a smaller sized carbon footprint.

Acoustic Insulation (Noise Reduction)

Acrylic is extremely effective at minimizing high-frequency sounds, such as traffic or community chatter. Because acrylic is less stiff than glass, it does not vibrate at the exact same frequencies, helping to separate sound waves before they enter the space. For maximum noise reduction, an air space of 100mm to 200mm in between the primary window and the acrylic pane is suggested.

Health and Condensation Control

Condensation happens when warm, moist air hits a cold window surface area. By offering 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, avoids the development of black mold, which can have harmful effects on respiratory health.


Installation Methods for Acrylic Secondary Glazing

Among the factors property owners choose acrylic is the range of non-permanent installation alternatives available.

Table 2: Common Installation Methods

ApproachBest ForDescription
Magnetic StripsEase of removalUtilizing self-adhesive magnetic tape on the window frame and the acrylic sheet. This permits for quick removal in summer season.
Clip & & Screw SystemLong-term stabilityPlastic clips or turn-buttons hold the sheet versus a foam seal. More safe for larger, 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 DIYLow-priced solution using hook-and-loop fasteners. Less airtight than magnetic or clip systems.

Step-by-Step Selection Guide

To ensure the best outcomes, one must follow these actions when picking their acrylic secondary glazing:

  1. Measure Accurately: Measure the height and width of the window recess. It is generally recommended to subtract 3mm from each side to permit for thermal growth.
  2. Figure out Thickness:
  • 3mm: Standard for little to medium windows.
  • 4mm-5mm: Better for big windows to avoid "bowing."
  1. Pick the Finish: While "Clear" is standard, "Frosted" acrylic can be used for bathroom secondary glazing to provide personal privacy without compromising light.
  2. Select the Fixing System: Ensure the chosen repairing technique can support the weight of the sheet size.

Upkeep and Care for Acrylic Sheets

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

  • Prevent Harsh Chemicals: Never utilize glass cleaners containing ammonia or alcohol (like Windex), as these can "trend" or cloud the acrylic.
  • Usage Soft Cloths: Microfiber or soft cotton cloths are necessary. Prevent paper towels, which can be abrasive.
  • Mild Soaps: A basic solution of lukewarm water and a drop of mild dish soap is normally enough.
  • Anti-Static Treatments: Using an anti-static cleaner can help avoid the acrylic from attracting dust, which prevails with plastic surface areas.

Often Asked Questions (FAQ)

1. Does acrylic secondary glazing stop condensation?

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

2. Can I still open my windows?

If utilizing magnetic or clip-on systems, the acrylic sheet can be quickly gotten rid of or set aside to allow the main window to be opened. For sash windows, sliding secondary glazing systems are offered, though these usually include a frame.

3. Is acrylic better than polycarbonate?

Acrylic is more UV-resistant and uses better clarity (it does not have the minor yellow/grey tint often discovered in polycarbonate). However, polycarbonate is essentially solid, making it better for high-security applications or areas prone to heavy effects.

4. The length of time does acrylic secondary glazing last?

Top quality UV-stabilized acrylic can last 10 to 20 years without substantial yellowing or degradation, supplied it is cleaned up properly.

5. Will it look obvious from the outside?

One of the main benefits of secondary glazing is its low visual effect. Since the acrylic is clear and set up within, it is rarely obvious from the outside of the residential or commercial property.


Acrylic secondary glazing represents a versatile, affordable, and highly effective way to upgrade home insulation. Whether the goal is to decrease heating costs, moisten the sound of a hectic street, or secure a historical home from the elements, acrylic offers a light-weight and DIY-friendly alternative to conventional glass. By selecting the right grade of product and a proper setup method, property owners can delight in a warmer, quieter, and more comfortable living environment without the expense of total window replacement.