Polystyrene vs plaster coving cost: which Is cheaper in Ireland? Coving is one of those finishing touches that can completely transform a room. Sitting neatly between your wall and ceiling, it softens harsh edges while adding architectural character and depth.
Whether you’re renovating a period property in Dublin or upgrading a modern home in Galway, coving plays both an aesthetic and functional role.
But one of the biggest decisions homeowners and trade professionals face is which material to choose. The two most common options are polystyrene coving and plaster coving—and they differ significantly in cost, durability, and finish.
If you’re wondering:
- How much is polystyrene coving?
- How much is plaster coving?
- Which option is cheaper in the long run?
This guide breaks it all down. For a full overview of pricing across all materials, see our guide on how much does coving cost in Ireland.
What Is Polystyrene Coving?
Key Features
Polystyrene coving is a lightweight, foam-based material widely used in modern renovations. It’s designed with convenience in mind, making it especially popular among DIY homeowners.
- Extremely lightweight
- Pre-primed and ready for painting
- Simple to cut with basic tools
- Ideal for quick installations
Average Cost of Polystyrene Coving in Ireland
Polystyrene is the most affordable coving option on the market:
- €2 – €8 per metre (basic profiles)
- €8 – €15 per metre (higher-density or decorative styles)
This makes it highly attractive for budget-conscious renovations or large-scale projects.
Pros of Polystyrene Coving
- Budget-friendly: One of the cheapest ways to upgrade a room
- DIY-friendly: Easy to install without professional help
- Moisture-resistant: Suitable for kitchens and bathrooms
- Lightweight: No heavy lifting or specialist tools required
Cons of Polystyrene Coving
- Less detailed finish: Not as crisp as plaster
- Easily damaged: Can dent or chip during installation
- Lower perceived value: May not suit high-end interiors
What Is Plaster Coving?
Key Features
Plaster coving is the traditional choice, commonly found in Georgian, Victorian, and Edwardian homes across Ireland. It’s known for its solid construction and premium finish.
- Made from gypsum-based plaster
- Heavier and more rigid
- Installed by skilled professionals
- Often used in heritage or luxury projects
Average Cost of Plaster Coving in Ireland
Plaster coving comes at a significantly higher price point:
- €10 – €30 per metre (materials only)
- €25 – €70+ per metre (fully installed)
Costs vary depending on the complexity of the design and labour involved.
Pros of Plaster Coving
- Sharp, intricate detailing
- Long-lasting and durable
- Enhances property value, especially in period homes
- Authentic finish for traditional interiors
Cons of Plaster Coving
- Expensive: Both materials and labour add up
- Heavy: Requires professional handling
- Risk of cracking: Especially if installed incorrectly or in homes with movement
Cost Comparison: Polystyrene vs Plaster Coving
Material Cost Comparison
Here’s a simple side-by-side comparison:
- Polystyrene: €2 – €15 per metre
- Plaster: €10 – €30 per metre
Polystyrene is clearly the cheaper option when looking at materials alone.
Installation Cost Comparison
Installation is where the gap widens even further:
- Polystyrene: Often DIY (minimal cost)
- Plaster: Requires skilled tradespeople
If you’re hiring a professional, check our guide on the cost to install coving for a full breakdown.
Total Cost Per Room Example
Let’s look at typical room sizes:
- Small room (12m perimeter)
- Polystyrene: €24 – €180
- Plaster: €300 – €840+
- Medium room (16m)
- Polystyrene: €32 – €240
- Plaster: €400 – €1,120+
- Large room (20m+)
- Polystyrene: €40 – €300
- Plaster: €500 – €1,400+
The difference becomes substantial as room size increases.
Which Coving Is Cheaper Overall?
In simple terms: polystyrene coving is cheaper upfront—by a significant margin.
However, cost isn’t just about initial spend. You should also consider:
- Durability: Plaster lasts longer if properly installed
- Maintenance: Polystyrene may need replacing sooner
- Property value: Plaster can enhance resale appeal
For short-term savings, polystyrene wins. For long-term value, the decision depends on your priorities.
When to Choose Polystyrene Coving
Polystyrene is ideal if you:
- Are working with a tight budget
- Prefer a DIY-friendly solution
- Are upgrading a rental property
- Need coving in moisture-prone areas like bathrooms
It’s particularly popular among homeowners doing phased renovations—starting with one room and expanding later.
When to Choose Plaster Coving
Plaster is the better choice if:
- You own a period home (Georgian, Victorian, Edwardian)
- You’re undertaking a high-end renovation
- You’re working with an interior designer or architect
- You want an authentic, premium finish
For trade professionals, plaster remains a go-to for projects where detail and craftsmanship are critical.
Modern Alternative: Polyurethane Coving
If you’re stuck between cost and quality, polyurethane coving offers the best of both worlds.
Why It’s Popular in Ireland
- Lightweight like polystyrene
- Sharp detailing similar to plaster
- Highly durable and moisture-resistant
- Easy to install (DIY or trade)
Brands like Gaudi Coving have made polyurethane a preferred option for both homeowners and professionals.
Best For:
- Homeowners wanting a designer finish without plaster costs
- Trade professionals needing consistent, reliable materials
This aligns perfectly with modern renovation trends—where aesthetics, durability, and efficiency all matter.
Hidden Costs to Consider
Beyond materials and installation, there are additional costs to factor in:
- Adhesives and tools
- Wastage from cutting errors
- Repairs over time
- Removal of old coving
If you’re replacing existing mouldings, check our guide on the cost to replace coving.
How Much Coving Will You Need?
Before buying, measure the full perimeter of your room (in metres). Always add 10–15% extra for cuts and waste.
Planning properly helps avoid overspending or delays. For a detailed guide, see how much coving do I need.
Best Choice Based on Your Budget & Goals
Budget-Friendly Option
Polystyrene
Best for quick, affordable upgrades and DIY projects.
Best Value Option
Polyurethane
Balances cost, durability, and design quality.
Premium Option
Plaster
Ideal for high-end finishes and period authenticity.
FAQs
Conclusion: Which Coving Should You Choose?
Choosing the right coving comes down to your priorities:
- Cheapest: Polystyrene
- Best balance: Polyurethane
- Premium finish: Plaster
If you’re focused on affordability and ease, polystyrene is hard to beat. If you want a long-lasting, design-led result, investing in polyurethane or plaster may be worthwhile.
Ultimately, the best choice depends on your:
- Budget
- Installation preference
- Desired finish
