Flat vs Pitched Roof in Ireland: Pros, Cons, and Costs

Selecting flat vs pitched depends on budget, style, and performance in Ireland’s wet climate. Here’s how they compare.

Flat Roof: Pros and Cons

Pros:

• Lower initial cost, faster installation
• Modern aesthetic and easier access
• Ideal for extensions and green roofs

Cons:

• Requires excellent waterproofing and regular maintenance
• Ponding risk if drainage is poor

Best materials: EPDM, TPO, GRP. See our flat roof service.

Pitched Roof: Pros and Cons

Pros:

• Excellent drainage and long lifespan
• Classic Irish appearance
• Better loft storage and insulation options

Cons:

• Higher upfront cost; more complex structure

Common materials: Slate, concrete/clay tiles, metal standing seam.

Cost Snapshot (Indicative)

• Flat roof: €70–€120/m² (material dependent)
• Pitched roof: €90–€150/m² (tile/slate quality)

Energy & Insulation

• Warm roof build-ups on flat roofs minimise condensation.
• Pitched roofs support deep insulation at rafters/ceiling.

Verdict

For extensions or modern designs, flat is great with proper waterproofing. For overall longevity and drainage, pitched wins.

Need tailored advice? Book a roof inspection.