Spec Now. Build by Summer.

If a scheme needs to be completed by summer, the time to specify is now.

Across the UK, contractor availability is tightening, lead times are becoming more critical, and project timelines are being compressed. What often causes delay isn’t the board choice — it’s the planning and preparation of what lies beneath.  

• Traditional timber subframes.

• On-site problem solving.

• Late-stage detailing changes.

• Movement, splitting, visible screws.

  
  

Too often, decking becomes a reactive site fix rather than a properly engineered part of the project.

If you want a deck delivered on programme — and without compromise — system thinking matters.

Here are five ways to ensure your timber decking UK scheme is specified correctly, supplied efficiently, and installed cleanly in time for a summer completion.

1️⃣ Start With a System — Not a Site Fix

Most decking failures don’t begin at the surface. They begin in the substructure.

Specifying a hidden fix decking system from day one eliminates many of the common on-site issues associated with traditional screw-fixed builds.

The Grad decking system uses:

• Aluminium 6060 structural rails in the subframe

• Precision Grad clip fixing under the boards (no screw penetration through boards)

• Boards become fully removable and re-installable (without surface damage time after time)

• Consistent and easy board spacing and alignment (clips are placed on rails at factory level for fast installation on site)

• System-based thinking reduces the risk of call-backs

  
  

There are no visible screws. No split boards from face fixing. No inconsistent lines.

More importantly, System-based thinking reduces the risk of call-backs. Installers aren’t improvising — they’re assembling a designed solution, that looks flawless.

When project timelines matter, predictability matters.

2️⃣ Specify Stable Materials From Day One

Decking and cladding made to last should be specified early — not value-engineered late.

Board movement, cupping and splitting are often the result of inappropriate timber or board selection combined with a screw-fixed restraint.

However, Grad is compatible with hundreds of premium, dimensionally stable composite and timber boards including:

• Thermory

• Western Red Cedar

• Mokousai

• Kebony

• Accoya

• Moso

• Forma® Click

  
  

These materials are chosen for:

• Compatibility with the Grad system 

• Reduced board movement

• Improved durability

• Cleaner elevations

• Consistent alignment

• Long-term aesthetic stability

When paired with the Grad aluminium substructure for decking, the performance of the boards (timber or composite) is enhanced rather than restricted.

The result is a cleaner finish — and remarkably fewer post-installation issues.

Includes ventilation detailing, installation strategy & supply guidance.

3️⃣ Design for Ventilation & Height Flexibility

Many decking failures are not surface failures — they are ventilation failures.

Timber subframes can trap moisture, particularly on rooftop decking, podiums and urban schemes where airflow is limited.

With the Grad aluminium substructure for decking and the Grad adjustable support systems (we call them pedestals), you can design for:

• Up to 400mm height capability with just Grad system

• Proper ventilation beneath boards

• Reduced moisture retention

• No timber subframe rot risk

  
  

This opens up application flexibility across:

• Commercial projects

• Rooftop terraces

• High-end residential schemes

• Urban courtyards and podium decks

• Pool surrounds with planned built-in storage and access points 

Designing with Grad builds ventilation into the system from the outset — avoiding remedial work later.

And on many constrained urban sites, that’s critical.

4️⃣ Use a Trained Installation Network

Even the best specification can fail without correct installation.

That’s why we’ve carefully built what we call Grad Pro — a network of vetted installers who have:

• Completed Grad training

• Used the system on their own live client projects

• Demonstrated consistent installation standards

  
  

These aren’t just names on a list — they are contractors who understand how the Grad decking system works in practice.

Equally for first-time installers, we provide both on-site and off-site support. The system itself is straightforward — many installers grasp the core methodology within an hour — but we never assume familiarity. We offer:

• Free online training sessions

• Practical installation guidance

• A dedicated support line for real-time questions

  
  

The result is measurable on site:

• Faster installation compared to traditional screw fixing (often 50+% faster)

• Accurate aluminium rail alignment

• Clean board finishing

• Reduced snagging and fewer call-backs

  
  

In addition, Grad supports the installation process with:

• Grad 3D rail layout guidance

• Technical detailing advice

• Project-based assistance where required

  
  

This reduces uncertainty for contractors at pricing stage and removes avoidable risk during delivery.

Because a deck is only as strong as its installation — and consistency on site protects project timelines.

5️⃣ Secure Supply Early — With a Coordinated UK Network

Programme pressure doesn’t just affect site — it affects procurement.

When a scheme is targeting summer completion, material certainty matters just as much as design intent. Delays rarely happen because of the visible board — they happen when supply, machining or logistics aren’t aligned early enough.

Grad works alongside an established UK network of timber and composite specialists to support coordinated delivery from specification through to installation.

Millworks brings precision manufacturing capability, including dedicated Grad-compatible grooving technology. Boards are machined accurately to integrate with the aluminium rail system, reducing on-site adjustments and improving installation efficiency. Their experience in premium timber finishes and coatings supports projects where aesthetic consistency is critical.

Ecoscape strengthens the network with nationally distributed composite decking and cladding solutions, including Forma® Click boards designed for integration with the Grad system. This provides architects and contractors with a low-maintenance alternative where project criteria require composite materials — supported by established UK stock and trade infrastructure.

BrooksBros contributes long-standing timber merchant expertise and national fulfilment capability. For projects requiring coordinated timber procurement at scale, their infrastructure and distribution network provide dependable supply routes.

ODC – The Outdoor Deck Company adds specialist decking knowledge and practical site-focused support, working closely with contractors who need reliable sequencing and delivery coordination.

Together, this network provides:

• Visibility of UK-based stock

• Reduced exposure to extended international supply chains

• Machined boards compatible with the Grad system

• Coordinated delivery and trade support

• Commercial alignment across suppliers

• Less reliance on long international supply chains

  
  

When summer deadlines are fixed, certainty of supply becomes part of the design strategy — not just a procurement task.

Securing materials early, through a connected UK supply chain, reduces risk and protects programme.

Spec Now. Build by Summer.

If you’re working on a scheme targeting summer completion, early specification prevents late redesign.

Send us your drawings and we’ll return:

• Grad rail layout guidance

• Board optimisation

• Budget indication

• Installer recommendations

No obligation. Just practical support.

Because the difference between a deck that’s finished on time — and one that isn’t — is rarely the surface.

It’s the system beneath it.

Alternatively, book a 30-minute CPD: Specifying Timber That Lasts — In Time for Summer. Or Send us your drawings → we return layout + guidance.