AAC Blockwork

Lightweight autoclaved aerated concrete blockwork for low-rise structure and infill where thermal performance and speed of installation are priorities.

Carbon and evidence

Product Evidence

Generic material record — no manufacturer product attached.

AI-estimated material

Evidence Base

Category estimate

No product evidence is attached to this generic material, so nothing on this card is numerical. The guidance below is qualitative — an AI-assisted category profile — for early design discussion, not for figures.

Next step: request a current product EPD or manufacturer carbon declaration, or swap in a branded product that holds one.

What's missing (3)

•No current product EPD is recorded.
•No quantified carbon result is recorded.
•No product-specific circularity or material-health claims are recorded.

Service Life — the B4 Replacement Input

60 years · basis not recorded

≈1 installation over a 60-year building study period.

B4 (replacement) follows the building, not the product: an assessor multiplies replacement cycles by project quantities. This record supplies the service life and does not compute B4.

Design & Specification Notes

Lightweight autoclaved aerated concrete blockwork for low-rise structure and infill where thermal performance and speed of installation are priorities.

Typical Uses

•Primary frame
•Long-span elements
•Load-bearing supports

Key Performance

High load-bearing capacity for primary frame.

Watch For

•
Cracking from differential movement
Coordinate movement joints and compatible thin-joint mortar strategy.
•
Moisture ingress reducing thermal performance
Detail weatherproof external layers and protect blocks during construction.

Specification Actions

•Provide EPD with declared A1-A3 impacts and manufacturer data for recycled inputs/energy mix.
•Verify compressive strength class, moisture detailing, and compatibility with selected render or rainscreen systems.
•Use lime-based mortars where feasible and detail clear material separation layers to improve demolition-phase recovery.

Indicative Health & Indoor Air

low Risk

•dust

Inert after installation. Manage silica/mineral dust during cutting and drilling with suitable controls.

Evidence:No evidence held

Products in this category

5 products from 4 manufacturers · 13 in this category. Ordered by the evidence each record holds, never by commercial standing.

Specification

Finish: Autoclaved aerated concrete blocks
Service life: 60 years