Embodied Carbon · Materials & Capital Goods
Embodied Carbon — Masonry & Finishes Calculator (Brick / Block / Tile / Paint)
Cradle-to-gate (A1–A3) embodied carbon for brick, aircrete block, ceramic and roof tile, and emulsion paint, with end-of-life (C) and beyond-boundary recovery (D) reported as separate EN 15804+A2 modules. Factors from ÖKOBAUDAT 2024 at AR5-100 GWP-total, for use in EN 15978 whole-building and Scope 3 capital-goods accounting. Module D is never netted into the A–C total.
What this calculator computes. Embodied carbon for masonry and finishes materials, declared module-by-module under EN 15804+A2 and assembled for EN 15978 whole-building life-cycle assessment. The dominant figure is Module A1–A3 (cradle-to-gate: raw material supply, transport to factory, manufacture). End-of-life modules C3 (waste processing) and C4 (disposal) and the beyond-system-boundary module D (net recovery / reuse credit) are reported on their own lines. All factors are sourced from ÖKOBAUDAT 2024 Release I and weighted at AR5-100 GWP-total. The category is Scope 3 capital goods.
Declared units differ by product family — this is the most common source of error. Brick and block masonry is declared per cubic metre (m³); sand-lime brick is declared per kilogram; tile is declared per square metre (m²); paint is declared per kilogram of wet product. The calculator converts to a common basis using the ÖKOBAUDAT density and declared-mass figures; spreadsheet-based assessments must convert manually before summing.
Module D rule. Per EN 15804+A2, the Module D recovery/reuse credit (negative = benefit) is reported separately and shall not be netted against the A–C total. The calculator enforces this; the worked example and audit checklist below explain why it matters for verification.
GWP basis. AR5-100, GWP-total (fossil + biogenic + LULUC), consistent with the steel/aluminium and timber sibling calculators. This calculator does not use the CBAM regulatory default dataset (AR6-100, roughly double these values) — those figures are for import carbon-pricing, not building design.
Excluded: structural concrete and cement (use the Concrete & Cement Calculator), glass / insulation / plasterboard (use the Building Envelope Calculator), structural steel and timber, on-site construction energy (Module A5), and the in-use operational energy of the building.
A–C (cradle-to-grave) is the recommended, complete view. Module D is shown separately at the +D setting and never netted into A–C.
Add a material and enter an element area above to calculate
Results appear instantly. The calculator converts your element areas into material quantities (brickwork by leaf thickness, paint by coats × spreading rate), then reports cradle-to-grave embodied carbon — the per-material breakdown, swap-options ladder, per-m² intensity and the full audit trail appear after calculation.
Results are indicative whole-life (EN 15804+A2 / EN 15978) embodied-carbon estimates for masonry units (brick, AAC block) and surface finishes (ceramic / roof tile, paint), reported as GHG Protocol Scope 3 Category 2 (Capital Goods) on an AR5-100 GWP basis. Factors are ÖKOBAUDAT 2024 generic / average datasets — design-stage EPD figures, not CBAM regulatory defaults (which are higher and on an AR6 basis; do not mix them). Element areas are converted to material quantities using the build-up constants shown per line (leaf thickness for masonry; coats × spreading rate for paint) — confirm these against your own take-off. Module coverage follows what each dataset publishes: tiles carry A1–A3 + C3 + D, paint A1–A3 + C4 + D, brick all four. Module D (end-of-life recovery credit) is reported separately under EN 15804 and is never netted into A–C. The result excludes A4 transport to site, A5 installation, B in-use, and — in this version — render, mortar, screed, wet plaster, natural stone, and tile adhesive & grout. Confirm quantities and factors against product-specific EPDs and your own records, and where material proceed to third-party verification under EN 15978 / ISO 14064-3.
Masonry and finishes rarely top a structural engineer’s carbon hot-list — the concrete frame and the steel usually do. But the outer leaf, the partition blockwork, the floor tiling and the paint that gets reapplied every seven years for the life of the building add up to a material share of upfront and whole-life embodied carbon that EN 15978 assessments routinely under-count.
This calculator declares every product the way the standard requires — A1–A3 cradle-to-gate as the headline, end-of-life (C) and recovery (D) on their own lines, and the Module D credit never netted against upfront carbon. It is the only masonry-and-finishes tool that treats paint as a recurring liability across the study period rather than a one-off coat at handover.
A standard solid clay brick holds about 0.16 kg CO₂e (A1–A3). By declared unit: solid clay brickwork is 113 kg CO₂e/m³, aircrete block 207 kg/m³, unglazed ceramic tile 7.2 kg/m², and interior emulsion roughly 0.84 kg/m² over two coats — all ÖKOBAUDAT 2024, EN 15804+A2, AR5-100.
Masonry and finishes are one input to a whole-building life-cycle assessment. Once you have the A1–A3, C and D figures for each product, roll them into the EN 15978 Whole-Building LCA Calculator alongside structure, envelope and services to produce a complete A–C–D building profile.
Open the Whole-Building LCA Calculator →
What “Masonry & Finishes” Covers — Scope, Boundary, and the A1–A3 Default
Masonry and finishes is the group of building products that enclose, divide, and surface a structure: the brick and block that form walls, the tile that covers floors, walls and roofs, and the paint that coats everything. Under EN 15804+A2 each of these carries an Environmental Product Declaration (EPD) reporting its carbon across defined life-cycle modules. This calculator reports those modules faithfully rather than collapsing them into a single number.
Structure Versus Finishes — Why Finishes Carry a Recurring Burden
Structural materials are installed once and stay for the life of the building. Finishes are different. Paint is reapplied on a maintenance cycle; tile is replaced at refurbishment; even masonry can be partially renewed. Whole-building assessments under EN 15978 capture this through the B-modules (B2 maintenance, B4 replacement), and an honest finishes assessment has to account for the repeated material applications across the study period — not just the coat applied at handover. The paint section below treats this directly.
Included, Excluded, and Not Yet Covered
| Included in this calculator | Report with a different tool |
|---|---|
| Clay brick (solid), aircrete (AAC) block, sand-lime brick | Structural concrete and cement — Concrete & Cement Calculator |
| Ceramic / stoneware wall and floor tile | Glass, insulation, plasterboard — Building Envelope Calculator |
| Clay and concrete roof tile | Structural and reinforcing steel — Steel & Aluminium Calculator |
| Interior and façade emulsion paint | Structural timber and bio-materials — Timber & Bio-Materials Calculator |
| End-of-life (C3, C4) and recovery (D) for the above | On-site construction energy (Module A5) and operational energy (B6–B7) |
The following are absent from the underlying dataset and excluded from the calculator’s scope. Do not substitute values from another database to fill the gap — that breaks the single-source EPD basis and the calculator cannot reproduce the figure. Treat them as out of scope and note the exclusion in your assessment: dense and medium-dense aggregate concrete block (only aircrete is covered), natural stone (granite, limestone, sandstone), a dedicated porcelain row (unglazed stoneware tile is the closest proxy), solvent / alkyd paint (only water-based emulsion is covered), and the wet trades — mortar, render, screed, tile adhesive and grout.
The Declared-Unit Trap
Each product family is declared in the unit its EPD uses, and those units do not match. Brick and block are per cubic metre; sand-lime is per kilogram; tile is per square metre; paint is per kilogram of wet product. Summing a per-m³ brick figure and a per-m² tile figure without converting produces a meaningless total. The conversion factors — ÖKOBAUDAT density for masonry, declared mass for tile, spreading rate for paint — are given in each section below so the arithmetic is transparent and auditable.
Brick & Block — Fired Clay, Aircrete, and Sand-Lime
Three masonry products are covered, and they differ by an order of magnitude once placed on a common basis — because their manufacture differs fundamentally. Fired clay is kilned at high temperature. Aircrete (autoclaved aerated concrete, AAC) is cement-bound and steam-cured. Sand-lime is dense and lime-bound. The headline A1–A3 figures below come from MasterBrain v2026.110 (ÖKOBAUDAT 2024, EN 15804+A2, AR5-100).
| Product | A1–A3 | C3 | C4 | D | Declared unit | Density |
|---|---|---|---|---|---|---|
| Clay brick, solid | 113.0 | −10.10 | 0.50 | −1.06 | per m³ | 575 kg/m³ |
| Aircrete (AAC) block | 206.9 | 1.153 | 6.498 | −3.214 | per m³ | 428 kg/m³ |
| Sand-lime brick | 0.126 | 0.00251 | 0.014 | −0.00271 | per kg | 1,800 kg/m³ |
All values kg CO₂e per declared unit. Per MasterBrain v2026.110 · ÖKOBAUDAT 2024 · EN 15804+A2 · AR5-100 GWP-total. Aircrete is the only block type in the dataset — there is no aggregate concrete block row.
Putting the Three on a Common Basis
Sand-lime is declared per kilogram, so to compare it with the per-m³ brick and block it converts using its density: 0.126 kg CO₂e/kg × 1,800 kg/m³ = 226.8 kg CO₂e/m³. On that common per-m³ basis, sand-lime is the highest of the three, aircrete next, and fired clay the lowest — the reverse of the intuition that “fired” implies “high carbon”. Fired clay’s relatively low figure reflects both its lower density (575 kg/m³, so less mass per cubic metre) and the efficiency of modern brick kilns.
A1–A3, normalised to per m³. Sand-lime converted from its per-kg figure using ÖKOBAUDAT density 1,800 kg/m³ (0.126 × 1,800 = 226.8). Per MasterBrain v2026.110 · ÖKOBAUDAT 2024 · AR5-100.
Reading the Negative C3 on Clay Brick
Solid clay brick reports a C3 (waste processing) of −10.10 kg CO₂e/m³ — a negative value, which looks like an error and frequently gets “corrected” by spreadsheet operators who assume an emission must be positive. It is not an error. It is the ÖKOBAUDAT biogenic-carbon accounting applied at the waste-processing stage, and it should be reported faithfully exactly as published. Do not zero it, do not flip its sign, and do not fold it into A1–A3. Each module is reported on its own line.
Reclaimed Brick and the Module D Credit
Every masonry product here carries a Module D figure — the net credit (negative = benefit) for recovery, recycling or reuse beyond the system boundary. Clay brick’s is −1.06 kg CO₂e/m³, aircrete’s −3.214, sand-lime’s −0.00271/kg. Reclaimed brick is a genuine market, and the reuse benefit is real — but under EN 15804+A2 the Module D credit is reported as a separate line and is never subtracted from the upfront A1–A3 carbon. A wall built from reclaimed brick still has its A1–A3 declared; the avoided-production benefit lives in D. The calculator keeps the two apart; the audit checklist explains why conflating them fails verification.
Tile & Ceramic Finishes — Wall, Floor, and Roof
Tile is declared per square metre of finished surface, with the ÖKOBAUDAT declared mass given alongside so it can be cross-checked against a material take-off. Three products carry confirmed figures in MasterBrain v2026.110: unglazed ceramic (stoneware) wall and floor tile, clay roof tile, and concrete roof tile.
| Product | A1–A3 (per m²) | C3 | C4 | D | Declared mass |
|---|---|---|---|---|---|
| Ceramic / stoneware tile, unglazed | 7.2003 | 0.15493 | — (inert) | −0.028784 | 20 kg/m² |
| Clay roof tile | 16.588 | 0.31966 | — (inert) | −0.070752 | 45 kg/m² |
| Concrete roof tile | 12.976 | 1.7218 | — (inert) | −0.49812 | 42 kg/m² |
All values kg CO₂e per m² of finished surface. Per MasterBrain v2026.110 · ÖKOBAUDAT 2024 · EN 15804+A2 · AR5-100 GWP-total. A glazed-ceramic tile row also exists in the calculator; its A1–A3 value is being confirmed against the live MasterBrain and is therefore not stated here.
Wall and Floor Tile — the Porcelain Question
The dataset has no separate porcelain row. Porcelain is a dense, low-porosity stoneware, and the unglazed ceramic / stoneware figure (7.2 kg CO₂e/m² at a 20 kg/m² declared mass) is the available proxy. Where a project specifies high-fired porcelain at a materially heavier laid mass, a manufacturer-specific EPD will give a tighter figure; in its absence, the stoneware proxy is the defensible default and the assumption should be stated.
Why Tile Has No C4
The tile rows declare C3 (waste processing) but show no C4 (disposal). Fired ceramic and concrete tile are chemically inert at end of life — there is no further disposal-stage emission to declare, and the end-of-life burden nets into C3. This is correct EPD behaviour, not a missing value. Report C3 as published and leave C4 empty for these products.
Roof Tile — Clay Versus Concrete
Clay roof tile (16.6 kg CO₂e/m²) carries a higher A1–A3 than concrete roof tile (13.0) — the firing energy again — but concrete roof tile carries a much larger Module D credit (−0.498 versus −0.071) and a higher C3 (1.72 versus 0.32), reflecting its cement content and aggregate recovery route at end of life. On upfront carbon alone, concrete roof tile is the lower choice; the full A–C–D picture narrows the gap.
Paint & Coatings — The Recurring-Carbon Problem
Paint is the one finish whose embodied carbon is dominated not by a single application but by repeated reapplication over the building’s life. Two water-based emulsions are covered, declared per kilogram of wet product (MasterBrain v2026.110, ÖKOBAUDAT 2024).
| Product | A1–A3 (per kg) | C3 | C4 | D | ≈ per m², 2 coats |
|---|---|---|---|---|---|
| Interior emulsion (wear-resistant) | 2.6270 | — (no processing stage) | 0.016615 | −0.0049980 | 0.84 |
| Façade emulsion (dispersion) | 2.1537 | — (no processing stage) | 0.016615 | −0.0037485 | 0.78 |
A1–A3, C, D in kg CO₂e per kg of wet paint. Per-m² figures use the calculator’s default spreading rates (0.16 kg/m²/coat interior, 0.18 kg/m²/coat façade) at two coats. Per MasterBrain v2026.110 · ÖKOBAUDAT 2024 · EN 15804+A2 · AR5-100. Only water-based emulsion is covered — no solvent / alkyd row exists.
From Per-Kilogram to Per-Square-Metre
Paint EPDs are declared by mass, but specifiers think in coverage. Convert with a spreading rate: interior two-coat coverage at the calculator’s default of 0.16 kg/m²/coat gives 2 × 0.16 × 2.6270 ≈ 0.84 kg CO₂e/m² for A1–A3. Façade two-coat at 0.18 kg/m²/coat gives 2 × 0.18 × 2.1537 ≈ 0.78 kg CO₂e/m². Higher-build or textured systems use more paint per square metre and scale up proportionally.
The Whole-Life Repaint — an Editorial Construction, Not a B-Module Factor
A single application understates paint’s real contribution, because interior emulsion is typically reapplied every five to ten years. There is no published EN 15804 B2 (maintenance) or B4 (replacement) factor for repaint cycles in the dataset — so the whole-life figure is constructed, not looked up: it is the per-application A1–A3 multiplied by the number of applications across the study period (study period ÷ repaint interval). The chart below shows cumulative A1–A3 for interior emulsion at 0.84 kg CO₂e/m² per two-coat application, repainted every seven years across a 60-year RICS study period.
| Point | kg CO₂e/m² (cumulative) |
|---|---|
| 0 | 0.8400 kg CO₂e/m² (cumulative) |
| 7 | 1.68 kg CO₂e/m² (cumulative) |
| 14 | 2.52 kg CO₂e/m² (cumulative) |
| 21 | 3.36 kg CO₂e/m² (cumulative) |
| 28 | 4.20 kg CO₂e/m² (cumulative) |
| 35 | 5.04 kg CO₂e/m² (cumulative) |
| 42 | 5.88 kg CO₂e/m² (cumulative) |
| 49 | 6.72 kg CO₂e/m² (cumulative) |
| 56 | 7.56 kg CO₂e/m² (cumulative) |
Over 60 years a 7-year repaint cycle puts roughly 7.6 kg CO₂e/m² of A1–A3 on the wall — about nine times the single-application figure. Extending the interval, specifying a more durable system, or leaving surfaces unpainted are the levers with real whole-life effect. Frame this as a maintenance assumption in your assessment, not as a declared B-module value.
How the Calculation Works — EN 15804 Modules and GWP Basis
The calculation is deliberately modular. Each product contributes a set of life-cycle module figures, and the calculator keeps them separate so the output maps cleanly onto an EN 15978 whole-building assessment and onto the masonry & finishes methodology.
The Modules, and Which Products Declare Them
| Family | A1–A3 | C3 | C4 | D |
|---|---|---|---|---|
| Brick / aircrete / block | declared | declared | declared | declared |
| Tile | declared | declared | — inert, nets to C3 | declared |
| Paint | declared | — no processing stage | declared | declared |
The asymmetry is correct and reflects the physical end-of-life route of each material. Inert fired tile has no disposal-stage emission beyond waste processing (no C4). Liquid-applied paint has no waste-processing stage as a coating film (no C3). Masonry carries the full set.
Module D is a beyond-system-boundary credit for the next product life — recovery, recycling, reuse. Under EN 15804+A2 it is reported as a separate line and shall not be subtracted from the cradle-to-grave A–C result. A material with a large D credit does not have “lower upfront carbon”; it has the same A1–A3 and a separately-stated future benefit. The calculator enforces the separation, and an assessment that nets D into A–C will not pass third-party verification.
Wastage
Material delivered is not material installed. Cut bricks, broken tiles and over-applied paint mean the purchased quantity exceeds the in-place quantity. A wastage uplift — commonly 5–15% depending on product and workmanship — is applied to the take-off before multiplying by the factor. The calculator applies a default uplift per product family; override it with project-specific figures where you have them, and document the rate used.
GWP Basis and the CBAM Caveat
Every figure on this page is AR5-100, GWP-total, consistent with the other ÖKOBAUDAT-sourced sibling calculators. Do not mix these with AR6-100 totals from elsewhere in the same inventory. In particular, the regulatory CBAM default dataset publishes embedded-emissions values for some of these materials at AR6-100 and roughly double these figures — those are designed for import carbon pricing under a different scope and accounting boundary, and must never be presented as building design figures. This calculator does not read the CBAM dataset.
Worked Example — Cavity Wall, Tiled Wet Room, and a 60-Year Repaint Cycle
This example takes a small assembly through the full module chain. All factors are from MasterBrain v2026.110; every step reconciles to a stated input.
Material Substitution — Where the Lower-Carbon Swaps Are
The substitution opportunities in masonry and finishes are narrower than in concrete, where supplementary cementitious materials move the number a long way. Here the levers are choice of masonry type, durability of finish, and quantity of paint over the building’s life. Model swaps quantitatively in the Material Substitution Savings Calculator; the qualitative picture follows.
- Masonry type, like for like. On a per-m³ A1–A3 basis the three masonry products span 113 (clay) to 227 (sand-lime). Where structural and acoustic performance allow a choice, fired clay is the lower-carbon option of the three — though selection is rarely carbon-led alone, and density, strength and thermal mass drive real decisions.
- Roof tile. Concrete roof tile (13.0 kg CO₂e/m²) is lower on upfront carbon than clay (16.6), with a larger end-of-life recovery credit. The gap narrows across the full A–C–D profile but holds upfront.
- Paint, over the study period. The single biggest finishes lever is not which paint but how often it is reapplied. Extending a 7-year cycle to 10 years removes roughly a third of the whole-life paint carbon. Leaving suitable surfaces unpainted removes it entirely.
- Reused and reclaimed masonry. The benefit is real but lives in Module D, not in a reduced A1–A3. Account for it on the D line and state the reuse assumption.
Audit Checklist — Eight Common Masonry & Finishes Errors
Third-party review of an embodied-carbon assessment traces each material from take-off through declared unit to reported figure. The eight items below are the recurring sources of restated results in masonry and finishes assessments.
Data Sources, Provenance, and Uncertainty
The complete underlying reference — every factor in this section, versioned with full source provenance and downloadable as CSV with a citable Zenodo DOI — is published as the Ökobaudat embodied carbon factors dataset.
Factor Provenance
All factors are drawn from MasterBrain v2026.110 and trace to a single source database under a single declared basis:
- Source database — ÖKOBAUDAT 2024 Release I, the German federal construction-materials LCA/EPD database, with representative dataset selection per product family.
- Standard — EN 15804+A2 for the product EPD module structure (A1–A3, C, D), assembled for EN 15978 whole-building assessment.
- GWP basis — AR5-100, GWP-total (fossil + biogenic + LULUC), reported per declared unit (per m³, per kg, or per m² depending on product).
- Scope — Scope 3 Category 2 (capital goods), as CO₂e.
Uncertainty
ÖKOBAUDAT representative datasets are sector averages for the German/European market and do not carry a single published ± band per row. Where a material is significant to a project’s total and a manufacturer-specific EPD is available, that EPD gives a tighter and project-defensible figure and should replace the representative value. The representative figures here are the appropriate default for early-stage assessment and for products without a specific EPD; state which you have used.
Update Schedule
Factor data tracks the live MasterBrain release; the version stamp throughout this page reflects the build in use. ÖKOBAUDAT publishes periodic releases, and the database version migrates with each MasterBrain phase that ingests a new release.
Masonry and finishes are one slice of the building’s embodied carbon. Take these A1–A3, C and D figures into the EN 15978 Whole-Building LCA Calculator alongside structure, envelope and services for a complete A–C–D profile, or model a specific swap in the Material Substitution Savings Calculator. The underlying method is documented in the masonry & finishes methodology.
Related embodied-carbon calculators
Frequently Asked Questions
A standard solid clay brick is roughly 0.0014 m³, so at 113 kg CO₂e/m³ (A1–A3, ÖKOBAUDAT 2024) it holds about 0.16 kg CO₂e cradle-to-gate. Perforated bricks contain less material per unit and come in lower. The per-m³ figure is the basis for any wall take-off.
On a per-m³ A1–A3 basis, solid clay brick (113 kg CO₂e/m³) is lower than aircrete block (207). Sand-lime, converted to a per-m³ basis using its density, is the highest of the three at about 227. Choice in practice is driven by structural, acoustic and thermal performance as well as carbon, so compare like-for-like assemblies rather than products in isolation.
A single two-coat application of interior emulsion is small — about 0.84 kg CO₂e/m². But paint is reapplied across the building’s life, and over a 60-year study period on a 7-year cycle the cumulative A1–A3 reaches roughly 7.6 kg CO₂e/m², about nine times the one-off figure. The recurring nature, not the single coat, is what makes paint worth assessing.
The −10.10 kg CO₂e/m³ C3 (waste processing) on solid clay brick is the ÖKOBAUDAT biogenic-carbon accounting applied at that stage. It is correct as published, not a sign error. Report it on the C3 line exactly as given; do not zero it, flip it, or fold it into the A1–A3 figure.
Under EN 15804+A2, A1–A3 is cradle-to-gate (raw materials, transport to factory, manufacture) — the dominant upfront figure. C3 and C4 are end-of-life waste processing and disposal. Module D is a beyond-system-boundary credit for the next product life (recovery, recycling, reuse). Each is reported on its own line.
No. EN 15804+A2 reports Module D as a separate line, and it shall not be subtracted from the cradle-to-grave A–C result. A material with a large D credit has the same A1–A3 as one without; the benefit is a separately-stated future credit. Netting D into A–C fails third-party verification.
Each EPD declares the unit most natural to that product: bulk masonry per cubic metre, sand-lime per kilogram, surface tile per square metre, liquid paint per kilogram of wet product. Before summing across products, convert all to a common basis using the published density (masonry), declared mass (tile), or spreading rate (paint). The calculator does this automatically; spreadsheet assessments must convert manually.
Yes — the module-by-module output is built to feed an EN 15978 whole-building assessment. This calculator produces the masonry and finishes line items; combine them with structure, envelope and services in the whole-building tool, and follow the staged method in the EN 15978 whole-building methodology for the full A–C–D building profile.
Methodology Notes and Limitations
Single source, single basis. Every factor is from ÖKOBAUDAT 2024 Release I at AR5-100 GWP-total, EN 15804+A2. The page does not mix databases or GWP bases, and neither should an assessment built on it.
Representative, not manufacturer-specific. ÖKOBAUDAT representative datasets are market averages. Where a material is significant and a manufacturer EPD exists, that specific EPD is preferred and gives a tighter figure.
Repaint cycles are a maintenance construction. No EN 15804 B2/B4 factor exists in the dataset for repaint. The whole-life paint figure is the per-application A1–A3 multiplied by applications across the study period, and is stated as such — it is not a declared B-module value.
Module D is informational against upfront carbon. Module D is reported as a separate line per EN 15804+A2 and is never netted into the A–C result.
Out-of-scope products. Dense aggregate concrete block, natural stone, dedicated porcelain, solvent paint, and the wet trades (mortar, render, screed, adhesive, grout) are not in the dataset and are excluded. Note any of these in your assessment as an explicit exclusion rather than substituting a value from another source.