The 10-Day Build Schedule: What Happens Every Day on Site
Most garden room companies are vague about what happens after you sign the contract. You get a start date, perhaps a rough timeline, and then a series of trades arrive at unpredictable intervals over several weeks. RoomRise does things differently. We believe you deserve to know exactly what will happen on your property, on which day, and in what order. This is the honest, detailed breakdown of our 10-day build schedule — the same sequence we follow on every project, from a compact garden office to a sprawling family studio.
Why a Fixed Schedule Matters
A predictable build is a stress-free build. When you know that the foundations arrive on Monday morning and the plasterers finish on the following Wednesday, you can plan your life around it. You know when to expect deliveries, when your garden will be busiest, and precisely when you will receive your keys.
Our 10-day build process works because we control every stage in-house. We do not rely on subcontractors who might delay your project by weeks because another job overran. Every member of the team on your site is a RoomRise employee, accountable to the same project manager, working to the same documented sequence.
Day 1-2: Foundations and Floor Cassette
The first two days are about creating a perfectly level, structurally sound base. This is the most critical phase — get the foundation wrong and every subsequent stage suffers.
Day 1 begins with site preparation and the driving of steel screw piles. Unlike poured concrete, which requires excavation, formwork, and several days of curing, screw piles are driven directly into the ground using a hydraulic machine. They reach load-bearing strata within minutes, provide immediate stability, and leave your garden largely undisturbed. There is no wet cement, no waiting, and no mess.
Once the piles are driven to the required depth — typically between 1.5 and 3 metres depending on ground conditions — we weld steel beams across the pile tops to create a rigid structural ring. This frame is checked with a laser level to ensure absolute precision. A tolerance of more than a few millimetres is unacceptable.
Day 2 sees the placement of the structural floor cassette. This is a pre-manufactured timber frame panel, built in our workshop to your exact dimensions, which lifts into position atop the steel ring beam. The cassette is already insulated with 100mm PIR insulation and fitted with a vapour control layer. By the end of Day 2, you have a solid, warm, perfectly level floor platform standing above your garden on steel piles — and not a drop of wet concrete anywhere on site.
Day 3-5: Walls, Shell, and Roof
With the floor in place, the building rises quickly. These three days transform the platform into a weatherproof shell.
Day 3 is dedicated to erecting the wall frames. These are prefabricated timber panels — again built off-site for accuracy — which are lifted into position and fixed to the floor cassette and to each other. The frames include the full insulation depth, typically 100mm or more of PIR insulation, giving you a wall U-value of around 0.18 W/m²K. That is a better insulation performance than most newly built houses.
Day 4 brings the breathable membrane wrap. We wrap the entire structural shell in a weather-resistant but vapour-open membrane. This layer allows the building to breathe whilst protecting the timber frame from moisture during construction and for the decades that follow. Every joint is taped and sealed. There are no shortcuts here — a poorly sealed wrap is the primary cause of draughts and long-term damage in lesser garden rooms.
Day 5 is roof day. The EPDM rubber roof membrane is applied in a single seamless sheet. Unlike felt, which degrades and cracks after a decade, EPDM has a proven 50-year lifespan. The rubber is bonded to the timber deck, dressed over the edges, and mechanically fixed at the perimeter. By the end of Day 5, the building is fully weatherproof. Rain, wind, and weather can no longer delay the interior work.
Day 6-7: Cladding and Glazing
Now the building begins to look like a finished space. The exterior receives its final skin and the glass goes in.
Day 6 is cladding day. Whether you have chosen Siberian larch, thermally modified timber, or a composite finish, the cladding is fixed to treated timber battens with a ventilated cavity behind. That cavity is essential — it allows air to circulate behind the cladding, preventing moisture buildup and ensuring the timber remains stable for decades. We never fix cladding directly to the insulation. That is a shortcut taken by lesser builders, and it leads to warping and rot.
Day 7 brings the glazing. Your aluminium bi-fold or sliding doors are lifted into their prepared openings, squared, levelled, and sealed. Windows are fitted using low-expansion foam and proprietary sealing tapes — never silicone alone. We test every opening for smooth operation before moving on. The transformation at this stage is dramatic: the building suddenly feels finished from the outside.
Day 8-9: Interior Finishes and Electrics
The final two full days of work focus on the interior. This is where the garden room becomes a genuinely usable year-round space.
Day 8 is plastering day. We use moisture-resistant plasterboard throughout, skimmed to a smooth finish by our own plasterers. The plasterboard adds another layer of fire resistance and acoustic insulation. By the end of the day, the walls are smooth, white, and ready to receive paint.
Day 9 brings the electrical fit-out. Sockets, switches, lighting, and data points are all installed by our qualified electricians. Every circuit is tested, certified, and signed off. We include consumer unit, lighting, and ample double sockets as standard — not as costly extras. If you have requested additional features such as underfloor heating controls, external lighting, or data runs, these are completed now.
Day 10: Final Paint and Handover
The last day is about perfection. The interior receives a full coat of matt emulsion paint in your chosen colour. Skirting boards are fixed, architraves are fitted around the doors, and every surface is checked.
Then comes the handover inspection. We walk through the building with you, testing every element — door operation, window seals, electrical function, heating response. We hand you the keys, the electrical certificates, the warranty documents, and the maintenance guide. The whole process, from the first pile to the final key turn, has taken ten working days.
Why Ten Days, Not Ten Weeks
The reason we can deliver in ten days when other companies take months is simple. We prefabricate. We control every trade. We do not wait for subcontractors. And we follow the same proven sequence on every build, refined over hundreds of completed projects across the Midlands, Nottinghamshire, Lincolnshire, and Yorkshire.
When you choose RoomRise, you are not gambling on a timeline. You are investing in a process. Book your complimentary design consultation today, and we will show you exactly how your ten days will unfold.