Sustainable from
start to finish
Sustainability extends beyond individual metrics or isolated decisions. It reflects how materials are sourced, manufactured, assembled and kept in service over time.
This page examines those relationships across the full lifecycle of concrete masonry, from initial design through long-term use and reuse.
SUSTAINABILITY IS THE
SUM OF MANY DECISIONS
Sustainability in construction is shaped by interconnected decisions across three primary areas:
- Resiliency
- Embodied Carbon
- Operational Energy
Broader sustainability strategies, including local sourcing and circular design considerations, can further support these outcomes across a material’s lifecycle.
Concrete masonry inherently supports each of these objectives without special design considerations, additional components or added cost.
Our Block Learning Hub features a free, on-demand webinar series devoted to each of these sustainability topics.
Efficient
Design and Construction
Circular design strategies support broader circular economy goals when established early in the design process. These decisions influence material demand, constructibility and long-term performance while helping reduce excess resource extraction.
Combining structure and enclosure as an integrated system can eliminate redundant layers, align material use with defined performance requirements and reduce construction waste.
Fewer materials and fewer trades
can translate into less waste, lower embodied carbon, and more predictable construction schedules.
EFFICIENT STRATEGIES
- Lower Labor Intensity
- Simplified Trade Coordination
- Faster Schedule
- Less Material
LOWER IMPACTS
LOWER COST
Supplementary Cementitious Materials
One of the most direct material strategies is the partial replacement of portland cement with supplementary cementitious materials (SCMs), including fly ash, slag cement, silica fume, and natural pozzolans such as calcined clay or calcined shale.
Introducing SCMs can reduce associated emissions and limit raw material extraction tied to cement production.
Recycling and Manufacturing Reuse
Waste CMU, commonly referred to as culls, rarely enters landfills. Instead, they are crushed and reused as aggregate — either in new concrete masonry units or in applications such as road base, structural fill and backfill — reducing reliance on virgin aggregate extraction.
Circulating Materials
at Their
Highest Value
Circular economy thinking extends beyond recycling. It links early design decisions — material selection, detailing and assembly methods — to long-term performance, replacement cycles and upstream environmental impacts.
Preserving durable systems reduces the need for demolition and replacement. In many cases, it also incorporates by-products from other industries, diverting material from landfills.
Preserving Value Over Time
Restoration, renovation, rehabilitation and reuse strategies can extend building life, retain material and structural value, and reduce the impacts associated with demolition and new material extraction.
Adaptive Reuse
Adaptive reuse creates opportunities to reimagine existing buildings for new uses while retaining durable components already in place.
Concrete masonry can support restoration, renovation and adaptive reuse strategies through durable, repairable assemblies designed for long-term use.
Former storage/industrial facility was converted into a thriving market and community space. The masonry structure remains central to the building’s value.
Bow Market
Boston, Massachusetts
Architect: Boyes-Watson Architects
Developer: Bow Market LLC /
Matthew Boyes-Watson & Zach Baum
General Contractor: Haycon Inc.
Originally built in the 1920s with concrete block and gabled trusses, this building was renovated by Johnson Architecture for modern use while retaining its masonry structure.
Advance Metal
Fabrication Building
Knoxville, Tennessee
Architect: Johnson Architecture Inc. (JAI)
Developer/Owner: John Ryan & Elizabeth McWhirter / Advance Metal Fabrication
An existing commercial warehouse was redeveloped into a cultural and mixed-use space, keeping the structure in service instead of demolition and replacement.
Library Street Collective
Detroit, Michigan
Architect: Peterson Rich Office (PRO) / OMA (Little Village expansion projects)
Developer: Library Street Collective / Anthony & JJ Curis
Dry-Stack Construction
and Future
Reuse
Dry-stack concrete masonry construction, in which units are stacked without mortar, is one design strategy where end-of-life objectives include unit recovery and reuse.
Dry-stack systems can be used in many applications typical of concrete masonry, particularly where a separate finish system is planned. Structurally, performance is comparable to conventionally mortared construction.
Additional Sustainability Considerations
Water and Material Efficiency
- Water is added only as required for cement hydration, not for flowability.
- Lower water demand can reduce upstream environmental impacts.
- CMU typically requires less cement per wall area than cast-in-place systems, depending on mix design and structural requirements.
Typical Cast-In-Place Mix (wet-cast)
Typical Concrete Masonry Mix (dry-cast)
Manufacturing Efficiency and Flexibility
Concrete blocks are produced to meet specified strength and performance requirements. Within controlled plant conditions, producers optimize mix design, compaction and curing to reliably achieve those targets with efficient material use and minimal production waste.
Let us help you bring sustainability to your next project. Our experts are here to provide free design assistance from start to finish.
The local advantage
Local Sourcing and Supply Chain Resilience
Concrete masonry is regionally manufactured, with production and sourcing rooted in distributed domestic supply networks.
LOCAL Materials
- Aggregates are typically sourced from nearby, regulated quarries
- Extraction operations are geographically compact
and subject to established environmental oversight
LOCAL manufacturing
- Supports regional labor networks
- Enables closer coordination among producers, designers and contractors
- Reduces transportation distances and associated emissions
- Because concrete masonry is domestically produced, assemblies comply with Build America, Buy America (BABA) Act requirements for federally funded infrastructure projects
LOCAL Supply Chain
Regional manufacturing reduces exposure to global disruptions such as shipping delays, port congestion and trade volatility, contributing to schedule and cost predictability.
Sustainability that performs in practice.
That’s the Beauty of Block.
RESOURCES
Explore the resources below for more insights on how to incorporate concrete masonry to enhance the resilience of your designs.
