Polycarbonate Thickness in Kenya: 8mm, 10mm, Solid and Twin-Wall Compared

Polycarbonate thickness in Kenya should be selected according to the application, support spacing, required light transmission, thermal performance and structural requirements. An 8mm or 10mm multiwall sheet may suit some roofing applications, while solid polycarbonate can be preferable where impact resistance, clarity or a different structural performance is required.

What Does Polycarbonate Thickness Mean?

Polycarbonate thickness refers to the overall thickness of the sheet, but thickness alone does not describe the complete performance of a polycarbonate panel.

Two sheets with the same thickness can have different internal structures.

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For example:

1. Solid polycarbonate
2. Twin-wall polycarbonate
3. Multiwall polycarbonate

can have substantially different properties despite being available in similar thicknesses.

Polycarbonate Thickness Kenya: What Should You Check?

When choosing polycarbonate thickness in Kenya, look beyond millimetres and consider span, support spacing, wind exposure, impact requirements, insulation and daylight requirements.

Important factors include:

1. Sheet thickness
2. Wall structure
3. Sheet dimensions
4. Support spacing
5. Roof pitch
6. Wind loading
7. Impact resistance
8. Thermal performance
9. Light transmission
10. UV protection

The manufacturer's technical data should be used for the final product selection.

8mm Polycarbonate

8mm polycarbonate can provide a practical balance between weight, rigidity, daylight transmission and thermal performance for suitable applications.

Depending on the product, 8mm sheets may be available in multiwall constructions.

Potential applications include:

1. Canopies
2. Walkways
3. Rooflights
4. Patio covers
5. Vertical glazing
6. Lightweight roofing

The actual allowable span should always be confirmed from the product's technical information.

10mm Polycarbonate

10mm polycarbonate provides a thicker construction than 8mm and may offer increased rigidity and thermal performance in suitable multiwall systems.

It can be considered for applications such as:

1. Roofing
2. Canopies
3. Commercial structures
4. Greenhouses
5. Partitions
6. Wall glazing

However, a thicker sheet is not automatically the best choice.

8mm vs 10mm Polycarbonate

The choice between 8mm and 10mm polycarbonate depends on the required performance rather than thickness alone.

Always compare the actual manufacturer's datasheet before specifying either thickness.

What Is Twin-Wall Polycarbonate?

Twin-wall polycarbonate consists of two outer layers connected by internal webs, creating an enclosed air space between the surfaces.

This construction can provide:

1. Low weight
2. Thermal insulation
3. Good stiffness for its weight
4. Diffused daylight
5. Practical roofing performance

Twin-wall sheets are widely used where both daylight and thermal performance are required.

What Is Solid Polycarbonate?

Solid polycarbonate is a dense, continuous sheet without the internal hollow channels found in multiwall products.

It can offer:

1. High impact resistance
2. Clear optical appearance
3. Good transparency
4. A solid surface
5. Easier cleaning compared with some multiwall structures

Its performance and cost differ from multiwall sheets.

Twin-Wall vs Solid Polycarbonate

Twin-wall vs solid polycarbonate is primarily a choice between different performance characteristics, not simply different thicknesses.

The right option depends on the project.

Polycarbonate for Roofing

For roofing applications, multiwall polycarbonate can provide a combination of low weight, daylight transmission and thermal insulation.

Before specifying it, check:

1. Roof pitch
2. Support spacing
3. Sheet orientation
4. Wind exposure
5. Fixing system
6. Thermal movement
7. Drainage

Roofing panels should be installed according to the manufacturer's requirements.

Polycarbonate for Vertical Glazing

Solid or multiwall polycarbonate can be used for vertical glazing, depending on the required appearance, insulation and impact performance.

Applications can include:

1. Screens
2. Partitions
3. Commercial walls
4. Industrial glazing
5. Walkways
6. Sports facilities

Vertical installation may have different support and drainage requirements from roofing.

Polycarbonate and Span

Sheet thickness and wall structure can influence the span a polycarbonate panel can accommodate, but span limits must come from the manufacturer's loading tables.

Do not assume:

Thicker sheet = any span

The actual allowable span depends on:

1. Sheet construction
2. Width
3. Loading
4. Support conditions
5. Wind pressure
6. Fixing system
7. Deflection limits

Polycarbonate and Wind Loading

Polycarbonate roofs and panels must be adequately designed and fixed for the wind conditions at the installation site.

Wind can create:

1. Uplift
2. Pressure
3. Panel movement
4. Fixing stress
5. Edge damage

Large exposed canopies and roofs require particular attention to fixing patterns and structural support.

Polycarbonate and Thermal Expansion

Polycarbonate expands and contracts with temperature changes, so installation must allow appropriate movement.

This is particularly important for large sheets exposed to direct sunlight.

The system should account for movement through:

1. Oversized fixing holes where specified
2. Appropriate connectors
3. Expansion gaps
4. Correct fixing methods

Never restrict movement simply to make the panel fit tightly.

Polycarbonate UV Protection

UV protection is an important consideration because prolonged sunlight exposure can affect the long-term performance of polycarbonate.

When buying polycarbonate, establish:

1. Which side has UV protection
2. Whether the UV layer is co-extruded
3. Installation orientation
4. Manufacturer warranty
5. Expected outdoor service life

Installing the protected side incorrectly can compromise the intended performance.

Polycarbonate Light Transmission

Light transmission varies according to sheet construction, colour, thickness and surface treatment.

Clear sheets can provide high levels of daylight.

Opal or diffused products can distribute light more evenly and reduce glare.

The right choice depends on whether the priority is:

1. Maximum transparency
2. Diffused daylight
3. Solar control
4. Privacy
5. Reduced glare

Polycarbonate and Heat Control

Polycarbonate roofing can admit significant solar radiation, making heat management important in buildings exposed to strong sunlight.

Possible solutions include:

1. Opal or diffused sheets
2. Solar-control products
3. Multiwall construction
4. Ventilation
5. Shading
6. Appropriate roof orientation

Thickness alone should not be relied upon to control heat gain.

Polycarbonate for Greenhouses

Greenhouse polycarbonate needs to balance light transmission with thermal performance and environmental durability.

Multiwall polycarbonate may be considered where:

1. Insulation is important
2. Diffused light is desirable
3. Durability is required
4. A more rigid covering is preferred

The crop and greenhouse design should determine the final specification.

Polycarbonate for Canopies

Canopy roofing often benefits from polycarbonate because it provides weather protection while allowing daylight through the roof.

It can be used for:

1. Carports
2. Walkways
3. Entrance canopies
4. Patios
5. Commercial shelters

The structure and fixing system must be designed for the selected panel.

Does Thicker Polycarbonate Always Mean Better?

No. The thickest polycarbonate is not necessarily the most suitable because performance depends on sheet construction, loading, light requirements and the supporting structure.

For example, a well-designed multiwall sheet may provide better thermal insulation than a thicker solid sheet.

Similarly, a solid sheet may be preferable where optical clarity or impact performance is more important.

Polycarbonate Sheet Cost

Polycarbonate price is influenced by thickness, wall structure, dimensions, coating, colour and manufacturer specification.

When comparing quotations, check whether suppliers are offering the same:

1. Thickness
2. Wall structure
3. Sheet dimensions
4. UV protection
5. Colour
6. Warranty
7. Accessories

A lower price may represent a different specification rather than a genuine saving.

Common Polycarbonate Specification Mistakes

Choosing polycarbonate based only on thickness or price can lead to poor performance and unnecessary costs.

Comparing Thickness Without Wall Structure

8mm solid and 8mm twin-wall are not equivalent products.

Ignoring Support Spacing

The sheet must be compatible with the structural system.

Forgetting UV Protection

Outdoor sheets require appropriate UV protection.

Choosing Maximum Transparency Automatically

Clearer is not always better for heat control.

Ignoring Thermal Movement

Large sheets require movement allowance.

Using the Wrong Fixing System

Connectors and fixings should match the sheet.

Polycarbonate Buying Checklist

Before purchasing polycarbonate, confirm the complete specification rather than asking for a thickness alone.

1. Thickness confirmed
2. Solid or multiwall construction confirmed
3. Twin-wall or other wall structure confirmed
4. Sheet dimensions confirmed
5. Light transmission checked
6. UV protection confirmed
7. Support spacing established
8. Wind loading considered
9. Thermal movement allowance provided
10. Connector system selected
11. Fixings confirmed
12. Roof pitch checked
13. Manufacturer warranty reviewed
14. Installation instructions available

Final Thoughts

Polycarbonate thickness in Kenya should be selected as part of a complete roofing or glazing specification. An 8mm or 10mm sheet may be suitable for different applications, while the choice between solid and twin-wall construction can have an even greater effect on thermal performance, weight, clarity and installation.

The key comparison is not simply:

8mm vs 10mm

It is:

Thickness + wall structure + span + loading + light + heat + fixing system

That approach makes it easier to select a polycarbonate product that performs properly for the intended building.