Structural Green Oak Beams: Strength, Beauty & Expert Craftsmanship in Sussex & Surrey
A single well-chosen oak beam can hold up a roof, open up a room, and give an entire project real character. At Oakfield Beams & Framing Ltd, we’ve seen this time and again over the last 30+ years. That’s why structural green oak beams continue to be one of the most popular choices for oak frame extensions, porches, garages, barn conversions, and full timber frame buildings across Sussex, Surrey, and the rest of the UK.
We don’t just supply green oak — we design, fabricate, and install bespoke structural oak framing every day here at Selehurst Farm in Lower Beeding, Horsham. These are proper working beams, not just decorative pieces. When specified and detailed correctly, they deliver genuine load-bearing strength alongside the warmth and natural beauty that clients love.
What Are Structural Green Oak Beams?
Structural green oak beams are freshly sawn oak sections used for load-bearing work while the timber still has a high moisture content. Unlike air-dried or seasoned oak, green oak is easier to cut, shape, and joint in its natural state — making it ideal for traditional mortice and tenon framing, trusses, braces, and complex bespoke work.
We’ve been working with green oak for decades. Once installed, it slowly seasons in situ, developing the attractive surface checking and splits that give each beam its own character. These are natural features of the timber, not faults, and they’re exactly what many of our customers in Sussex and Surrey want to see.
Why We Recommend Green Oak for Structural Projects
Green oak strikes the perfect balance between strength, workability, and appearance. It’s a tough British hardwood that can carry serious loads, yet it’s still straightforward to machine and joint on site or in our workshop.
We use it regularly for:
Full oak frame extensions
Traditional porches
Garages and car ports
Pergolas and garden rooms
Barn conversions
Exposed internal beams and vaulted ceilings
For many local projects, an exposed green oak beam does far more than a hidden steel RSJ ever could — it becomes a standout architectural feature that adds real warmth and value to the home.
Natural Movement – What to Expect
Green oak moves as it dries. It will shrink slightly across the grain and develop surface checks over time. This is completely normal and something we plan for on every job.
At Oakfield Beams & Framing Ltd, we take care of the detailing from the start — proper connections to masonry, glazing, and finishes — so the movement is controlled and predictable. When done right, your beams will look better as they mature, developing depth, colour, and character that improves with age.
Choosing the Right Beam Size & Specification
There’s no one-size-fits-all when it comes to structural oak. The correct beam depends on span, load, supports, and the overall design.
We offer full support including:
Expert advice on beam sizing and structural grading
CAD drawings and structural calculations
Bespoke fabrication — stop chamfers, housings, tenons, rebates, and full frame packages
Guidance on appearance (cleaner faces for interiors or more characterful sections)
Whether you need a single large structural beam or a complete oak frame, we make sure it’s right for your project.
Green Oak vs Air-Dried Oak
We stock both, and each has its place. Green oak is usually the best choice for structural framing, larger sections, and traditional joinery. Air-dried oak can be better where minimal movement is critical (e.g. certain internal applications or finer finishes).
We’ll always give you honest advice based on your specific build, location, and budget.
Ready for Your Project?
If you’re planning an oak-framed extension, porch, garage, or any project that needs strong, beautiful structural oak in Sussex, Surrey, or beyond, get in touch early.
At Oakfield Beams & Framing Ltd we offer a complete service — from initial design and structural advice right through to precision fabrication and installation. Our hands-on approach means you get beams and frames built by experienced craftsmen who understand oak inside out.
Contact us today for a no-obligation quote or to discuss your project. We’re here to help you get it right from the start.
📍 Selehurst Farm, Brighton Road, Lower Beeding, Horsham, West Sussex RH13 6NQ 🌐 www.oakfieldbeams.com 📞 Give us a call — we’re always happy to talk oak.