Why Choose Allan Block Segmental Retaining Walls? Speed, Safety, and Style Explained

25 July 2025

When it comes to retaining walls, performance matters but so does how quickly you can build, how safe the result is and how well it fits into the overall landscape design. That’s exactly where Colinwell’s Allan Block retaining wall system sets itself apart. 

At Colinwell, we specialise exclusively in segmental Allan Block retaining walls because they offer a smarter, faster and more flexible alternative to traditional masonry methods. Whether you're planning garden walls in a new housing development or engineered structures for tiered plots, Allan Block delivers on all fronts: speed, safety, and style. 

 

1. Speed: Build Smarter, Deliver Faster

Construction schedules are tight. Delays cost money. And traditional retaining wall systems especially masonry can slow a project down significantly. 

Allan Block streamlines the process: 

• Dry-laid construction means no curing time, no mortar and faster installation. 

• Modular design allows for simple stacking and alignment, reducing skilled labour requirements. 

• No pins, clips, or complex hardware - just strong, interlocking blocks with a built-in setback. 

 

2. Safety: Designed with People in Mind

Retaining walls are more than just structural features, they’re part of the living environment with safety never being an afterthought. 

That’s why every Allan Block system prioritise safety. 

• Patented chamfered edges create an anti-climb surface, reducing risk in residential settings. 

• BBA / HAPAS Certification ensures compliance for use on infrastructure and residential roads. 

• Engineered to build tall - offering long-term stability even on challenging sites. 
• Continuous connection system with Geogrid provides exceptional structural integrity for load-bearing applications. 

 

3. Style: Aesthetic Options That Complement Any Landscape

Retaining walls don’t have to look dull or overly industrial. Colinwell’s Allan Block retaining wall range gives the flexibility to design with confidence. 

• Choose from five contemporary colour options to match or contrast the surrounding landscape. 

• The chamfered edge finish provides a clean, refined aesthetic. 

• Curves, corners and stairs? Allan Block’s modular system is designed to adapt. 
• Ideal for front gardens, backdrops to communal green space, or stepped plots. 

 

Need Advice for Your Project?  

If you’re looking for a retaining wall solution that prioritises speed, safety, and style without compromising on structural performance, Colinwell’s Allan Block system is the answer. 

 

Contact our team today to access: 

• Free preliminary design support from an experienced in-house technical team. 

• Technical drawings and specification support. 

• Sample blocks, colour options, and case studies.