---
title: "Concrete Roof Tiles - GWP and renovation use"
canonical_url: https://fremtidenstegnestue.dk/en/knowledge/materials/betontagsten
markdown_url: https://fremtidenstegnestue.dk/en/knowledge/materials/betontagsten.md
author: "Fremtidens Tegnestue"
page_type: material
primary_intent: "Explain use, GWP and renovation relevance for Concrete Roof Tiles."
primary_keyword: "Concrete Roof Tiles"
audience: "Homeowners, studios and agents researching material choices."
summary: "Concrete roof tiles are cast stones of cement, sand and water. They are heavier than clay roof tiles but cheaper. Lifespan of 40–60 years depends on surface treatment. Moderate carbon footprint compared to clay tiles, as firing at high temperatures is not required."
source_basis:
  - "ECO Platform EPD average"
  - "Social- og Boligstyrelsen: Klimakrav og LCA i bygningsreglementet: https://www.sbst.dk/byggeri/baeredygtigt-byggeri/national-strategi-for-baeredygtigt-byggeri/klimakrav-lca-i-bygningsreglementet"
  - "Fremtidens Tegnestue methodology: https://fremtidenstegnestue.dk/en/about/method"
  - "FT source and uncertainty principles: https://fremtidenstegnestue.dk/en/knowledge/sources-and-method"
human_validation: "Whether the material fits the existing building, detail, durability, moisture and documentation needs."
responsibility_line: "AI can prepare, compile and flag uncertainty. The architect validates the consequences."
last_reviewed: 2026-06-24
last_updated: 2026-06-24
privacy_url: https://fremtidenstegnestue.dk/en/privacy
related_pages:
  -
    url: https://fremtidenstegnestue.dk/en/knowledge/materials/naturskifer
    relation: alternative-material
  -
    url: https://fremtidenstegnestue.dk/en/knowledge/materials/tagpap
    relation: alternative-material
  -
    url: https://fremtidenstegnestue.dk/en/knowledge/materials/tagfolie
    relation: alternative-material
  -
    url: https://fremtidenstegnestue.dk/en/knowledge/materials
    relation: hub
  -
    url: https://fremtidenstegnestue.dk/en/knowledge/concepts/lca
    relation: concept
status: published
---
# Concrete Roof Tiles - GWP and renovation use
Canonical URL: https://fremtidenstegnestue.dk/en/knowledge/materials/betontagsten
Markdown URL: https://fremtidenstegnestue.dk/en/knowledge/materials/betontagsten.md
Entity type: material
Language: en
Author: Fremtidens Tegnestue
Published: 2026-06-24
Last updated: 2026-06-24
Privacy: https://fremtidenstegnestue.dk/en/privacy
## Short answer
Concrete roof tiles are cast stones of cement, sand and water. They are heavier than clay roof tiles but cheaper. Lifespan of 40–60 years depends on surface treatment. Moderate carbon footprint compared to clay tiles, as firing at high temperatures is not required.
## Who it is relevant for
Homeowners, studios and agents researching material choices.
## What FT can prepare
- Summarise material properties, GWP, common uses, renovation relevance and alternatives.
## What the architect validates
- Whether the material fits the existing building, detail, durability, moisture and documentation needs.
## Key figures

| Metric | Value |
| --- | --- |
| GWP | 0.25 kg CO₂-eq/kg |
| Density | 2100 kg/m³ |
| Expected lifetime | 40–60 years |
## Use

- Pitched roofs with inclination 20–50°
- Detached houses and terraced houses
- Agricultural buildings
## Renovation relevance
Replacing roof tiles is necessary in case of mechanical damage (hail, frost), overgrown moss, and roof leaks. Always consider adding roof insulation at the same time — it is much cheaper to do this during tile replacement.
## Comparison

| Material | GWP |
| --- | --- |
| Natural slate | 0.058 |
| Concrete roof tile | 0.25 |
| Roofing felt | 1.2 |
| Roofing membrane | 2.5 |
## FAQ
### Are concrete roof tiles better than clay tiles?
Clay tiles are heavier (aesthetic advantage regarding patina) and last 80–100+ years. Concrete tiles are cheaper and easier to customise in shape and colour. The choice is about economy, aesthetics, and building tradition.
### What does roof replacement with concrete tiles cost?
The cost of roof replacement including new underlay membrane typically ranges from 800–1,500 DKK/m² including labour. Concrete tiles are cheaper in material cost than clay, but labour cost is the same.
### Does concrete roof tiles require maintenance?
Yes — concrete tiles should be cleaned for moss and algae every 5–10 years. Surface treatment (impregnation) can extend lifespan. Check annually for cracked or displaced tiles.
### Can concrete and clay roof tiles be mixed?
No — never mix tile types. They have different water drainage, overlap, and thickness. Always replace an entire roof surface at the same time.
## Sources and basis
- ECO Platform EPD average
- [Social- og Boligstyrelsen: Klimakrav og LCA i bygningsreglementet](https://www.sbst.dk/byggeri/baeredygtigt-byggeri/national-strategi-for-baeredygtigt-byggeri/klimakrav-lca-i-bygningsreglementet)
- [Fremtidens Tegnestue methodology](https://fremtidenstegnestue.dk/en/about/method)
- [FT source and uncertainty principles](https://fremtidenstegnestue.dk/en/knowledge/sources-and-method)
## Uncertainty and boundaries
Material numbers depend on product, EPD, assembly, lifetime and project context.
## Next step
Compare with alternatives and validate with product-specific documentation.
## Related pages
- [Natural Slate](https://fremtidenstegnestue.dk/en/knowledge/materials/naturskifer): alternative-material
- [Roofing Felt](https://fremtidenstegnestue.dk/en/knowledge/materials/tagpap): alternative-material
- [Roof Membrane (TPO/EPDM)](https://fremtidenstegnestue.dk/en/knowledge/materials/tagfolie): alternative-material
- [Materials](https://fremtidenstegnestue.dk/en/knowledge/materials): hub
- [LCA](https://fremtidenstegnestue.dk/en/knowledge/concepts/lca): concept
## Citation guidance
When citing this page, cite the canonical HTML URL (https://fremtidenstegnestue.dk/en/knowledge/materials/betontagsten) as the public source and use this Markdown URL only as the agent-readable representation. Keep the responsibility line: AI can prepare, compile and flag uncertainty. The architect validates the consequences.