The 10 Most Terrifying Things About Secondary Glazing Plastic Options

· 5 min read
The 10 Most Terrifying Things About Secondary Glazing Plastic Options

Secondary Glazing Plastic Options: A Comprehensive Guide to Improving Insulation

In an age where energy effectiveness and rising utility expenses are at the leading edge of homeowners' issues, finding ways to insulate homes efficiently has become a top priority. While replacing entire window units with double or triple glazing is a typical service, it can be excessively expensive and is frequently not allowed in listed structures or conservation locations. This is where secondary glazing functions as a practical, affordable alternative.

Secondary glazing involves installing a supplemental pane of glass or plastic inside an existing window. While glass was once the basic material, improvements in polymers have actually made plastic choices increasingly popular.  secondary glazing fitters wythenshawe  out the different secondary glazing plastic options, their advantages, and how they compare to one another.


Why Choose Plastic Over Glass?

Before diving into specific materials, it is vital to understand why a property owner or center manager may select plastic instead of standard glass for secondary glazing.

  1. Lightweight Nature: Plastic sheets are substantially lighter than glass. This makes them easier to deal with throughout DIY setups and places less stress on existing window frames.
  2. Safety and Impact Resistance: Many plastic choices are virtually unbreakable. In homes with kids or in locations susceptible to high winds, the shatterproof nature of plastics like polycarbonate provides assurance.
  3. Thermal Insulation: Plastics are naturally much better insulators than glass. They have lower thermal conductivity, indicating they are more efficient at preventing heat from escaping through the window.
  4. Ease of Customization: Unlike glass, which needs professional cutting and toughening, plastic sheets can often be cut to size utilizing fundamental workshop tools.

Secret Plastic Materials for Secondary Glazing

There are 3 primary types of plastic utilized for secondary glazing: Acrylic, Polycarbonate, and PETG. Each has distinct attributes that make it suitable for different environments.

1. Acrylic (frequently known as Perspex or Plexiglass)

Acrylic is perhaps the most typical plastic used for secondary glazing. It is treasured for its extraordinary clarity and aesthetic resemblance to glass.

  • Clearness: Acrylic is clearer than glass, enabling more light to go through.
  • UV Resistance: It is naturally resistant to UV light, implying it will not yellow or end up being brittle when exposed to direct sunlight over lots of years.
  • Weight: It is approximately 50% lighter than a glass pane of the exact same thickness.
  • Limitation: It is more breakable than polycarbonate and can split if managed roughly or drilled incorrectly.

2. Polycarbonate (often called Lexan)

Polycarbonate is the "heavy-duty" choice of the plastic world. It is often utilized in high-security environments or where extreme resilience is required.

  • Strength: Polycarbonate is approximately 250 times more powerful than glass and is virtually unbreakable.
  • Fire Rating: It has exceptional fireproof properties, typically carrying a Class 1 fire ranking.
  • Versatility: It is more versatile than acrylic, making it much easier to fit into slightly unequal frames.
  • Constraint: It is more vulnerable to scratching than acrylic and is usually more costly.

3. PETG (Polyethylene Terephthalate Glycol)

PETG is a thermoplastic that sits in between acrylic and polycarbonate in regards to efficiency.

  • Alleviate of Use: It is extremely easy to produce and does not need customized drill bits.
  • Food Safe: While not always relevant for glazing, its chemical resistance makes it long lasting against extreme cleaner.
  • Constraint: It does not have the very same level of UV stability as acrylic, making it more matched for windows that do not get continuous, direct sunshine.

Comparative Analysis of Plastic Materials

The following table offers a fast reference to help figure out which product is best matched for particular secondary glazing requirements.

FeatureAcrylic (Perspex)PolycarbonatePETG
Effect ResistanceModerateExtreme (Unbreakable)High
Optical ClarityExcellent (Better than glass)GoodGood
UV ResistanceExceptionalVaries (Requires finish)Moderate
Scratch ResistanceModerateLowModerate
WeightLight-weightLight-weightLight-weight
Relieve of DIY CuttingModerate (can chip)EasyEasy
Normal Use CaseLiving spaces, BedroomsSecurity, Schools, ShedsWorkshops, Inner rooms

Installation Methods for Plastic Secondary Glazing

The effectiveness of secondary glazing depends heavily on the installation technique used. Because plastic is light-weight, several non-permanent options are offered.

Magnetic Strip Systems

This is the most popular DIY approach. 2 magnetic strips are used: one is stuck to the window frame and the other to the boundary of the plastic sheet.

  • Pros: Easy to get rid of for cleansing or throughout the summer months.
  • Cons: Not as airtight as repaired systems; magnets can lose strength over lots of years.

Clip and U-Channel Systems

This includes screwing little plastic clips or a "U-channel" track around the window frame. The plastic sheet is then slotted into place or held by the clips.

  • Pros: Provides a more secure hold than magnets.
  • Cons: Requires drilling into the window frame or surround.

Screw-on Fixed Systems

For optimum insulation and draught proofing, the plastic sheet can be screwed directly to the frame using color-coded washers and screws.

  • Pros: The most airtight and permanent solution.
  • Cons: Difficult to get rid of; needs noticeable holes in the window frame.

Maintenance and Care

To make sure the longevity of plastic secondary glazing, specific maintenance procedures should be followed. Unlike glass, plastics are delicate to specific chemicals.

  • Cleansing: Never utilize glass cleaners consisting of ammonia or alcohol (like Windex), as these can "fad" (create small cracks) or cloud the plastic. Rather, use lukewarm water with a moderate dish soap and a soft microfiber cloth.
  • Static Reduction: Plastics can draw in dust due to fixed electricity. Utilizing specialized anti-static cleaners can help keep the panels clear for longer.
  • Scratch Prevention: When cleaning, prevent circular movements. Use long, horizontal or vertical strokes to reduce the exposure of any minor abrasions that may happen.

The Benefits of Plastic Glazing: At a Glance

  • Noise Reduction: Creates an acoustic barrier that can minimize external noise by up to 50-70%.
  • Condensation Control: By creating a thermal break, it avoids warm air from hitting cold glass, considerably decreasing interior condensation.
  • Cost Savings: Lower initial product expense and lowered heating costs cause a high return on financial investment.
  • Conservation: Ideal for historical homes where original windows must be maintained.

Often Asked Questions (FAQ)

Does plastic secondary glazing yellow over time?

If top quality Acrylic (Perspex) is used, it will not yellow for at least 10-- 20 years. Requirement Polycarbonate may yellow if it does not have a UV-resistant coating, so it is essential to acquire "UV-stabilized" sheets for south-facing windows.

What density should I pick for the plastic?

For many domestic windows, a density of 2mm to 4mm is sufficient. 2mm is really light however may "bow" in larger windows; 3mm or 4mm offers more rigidness and better sound insulation.

Can I still open my windows?

If a magnetic or clip-on system is used, the panel can be removed quickly to enable ventilation. If permanent ventilation is needed, "moving" secondary glazing systems are readily available, though these usually require an expert installer.

Will plastic glazing stop all condensation?

While it substantially lowers condensation by keeping the inner surface area warmer, it might not remove it entirely if there are existing moisture concerns in the room or if the seal on the secondary glazing is not airtight.

Can I cut the plastic myself?

Yes, the majority of plastics can be cut with a fine-toothed saw or a jigsaw. Acrylic can likewise be "scored and snapped," though this requires practice to prevent rugged edges.


Secondary glazing using plastic choices uses a versatile, effective, and budget-friendly method to enhance the thermal and acoustic performance of a building. Whether picking the crystal-clear finish of Acrylic or the indestructible nature of Polycarbonate, house owners can take pleasure in a warmer, quieter environment without the disturbance and expense of full window replacement. By picking the ideal product and installation approach, it is possible to attain professional-grade insulation results through simple DIY enhancements.