I would highly recommend Mucha company, I had my kitchen renovation and I found the team extremely professional, friendly, skilled, top job done, thank you Mucha
Clear costs, no surprises
We deliver expert RSJ installation in Trowbridge, bringing structural precision and confidence to every project we undertake.
Done right, no shortcuts.
RSJ installation is an ideal choice for homeowners enhancing their ground floor to create a more spacious and flowing living area. By introducing a structural steel beam, walls that previously separated rooms can be eliminated while maintaining the integrity of the building. We conduct every RSJ installation following precise calculations from a structural engineer, ensuring the outcome is both safe and visually appealing.
Linking a new extension to your current property comes with structural requirements that necessitate expertise beyond standard building practices. RSJ installation allows the two structures to merge seamlessly, with the steel beam efficiently carrying the load. We oversee each aspect of the process, from temporary propping to managing building control notifications, ensuring everything is well-coordinated.
For landlords developing HMO properties or investors looking to reconfigure layouts to maximize rental yield, RSJ installation provides a reliable and lasting structural approach. Introducing rolled steel joists at critical points within a building enables significant spatial adjustments without jeopardizing structural performance. With over 20 years of experience managing complex projects, we execute each RSJ installation with the precision and accountability that property investment demands.


Dust travels fast during structural alterations. Move your armchairs and sideboards out of adjacent hallways well before our crew arrives with the heavy gear. When we bring an RSJ in Trowbridge into an older terraced home, tight corners and narrow doorframes demand completely unobstructed routes to avoid damaging existing plasterwork or timber architraves. Pack away loose kitchenware from cupboards sitting directly on the opposite side of that partition. Strip paintings from adjacent walls. Vibrations from masonry saws loosen fixings easily.
Heavy steel beams cannot rest directly on bare floorboards or delicate ceramic tiles. We place thick timber spreader pads across joists to distribute the load evenly before setting down any temporary screw jacks. Without adequate subfloor protection, steel edges bite into floor coverings and leave permanent indentations across your hallway. Lift expensive carpets completely and roll them away in another room instead of hoping a canvas drop cloth prevents heavy gouges or mortar grit grinding into the pile.
Every RSJ installation we perform adheres strictly to the structural engineer's calculations, ensuring precise technical accuracy and long-term structural integrity.
Temporary propping is used throughout the RSJ installation, safeguarding the existing structure at each stage and providing you with complete reassurance that the work is performed with care.
We manage all notifications to building control as part of the RSJ service, so you won't have to navigate regulatory requirements or risk non-compliance alone.
Once the RSJ is securely installed, our team performs all necessary corrective works to the highest standard, preparing the space for the next phase without requiring additional contractors.
With us overseeing the RSJ installation alongside related works, you benefit from a single point of contact, a clear schedule, and over 20 years of structural expertise guiding every decision.
RSJ installation allows you to open up your ground floor or join an extension to your existing house, transforming your property's layout in a structurally sound and aesthetically pleasing way.
Central heating pipes often run unseen through internal masonry blocks. Striking a live central heating pipe while inserting an RSJ in Trowbridge causes immediate water damage to your ceilings downstairs. A qualified plumber needs to drain the circuit, cut out the redundant pipe loop, and reroute hot feeds around the new steel flange. Solid walls hide ancient lead or plastic additions that cannot remain pinched against metal flanges.
Electricians must drop existing consumer units or trace cables before any masonry chisel bites into the mortar course. Slicing through live mains cables hidden behind old bonding plaster creates severe safety hazards on site. We feed wires through protective conduit sleeves running underneath the steel beam rather than letting bare sheaths rub directly against unyielding cold metal corners.

We begin by examining the structural engineer's calculations to determine the exact RSJ specifications for your project, ensuring all details are addressed before we start.
Before touching any load-bearing walls, we set up temporary propping to safely support the existing structure throughout the RSJ installation process.
We take care of all necessary notifications to building control for you, making sure the RSJ installation complies with current regulations and is documented correctly from the start.
Our skilled team supplies and installs the RSJ according to the specifications outlined by the structural engineer, whether for opening up the ground floor or integrating a new extension with your home.
After the RSJ is securely installed and propping removed, we restore all affected areas to a clean, finished standard, readying the space for your next project phase.
Every RSJ installation we execute in Trowbridge follows the structural engineer's calculations precisely, ensuring that loads are transferred safely and your building performs as intended. We maintain temporary propping throughout the entire process, protecting the existing structure at every phase. The result is an open and thoughtful ground floor layout, without compromising the property's integrity. An accurately installed RSJ changes how a space functions, and this improvement is built to endure.
When connecting an extension to an existing home or taking down a wall for a more expansive living area, the RSJ must be specified, positioned, and installed with utmost precision. We manage the total process, from building control notification to finishing touches once the steel is in place. Clients receive completed spaces that show no signs of structural changes beneath, only the elegant lines and proportions they envisioned. That high level of finish is our standard across every project.


Freezing conditions prevent engineering mortar from curing properly beneath concrete padstones. We monitor overnight forecasts before bedding an RSJ in Trowbridge onto external blockwork pockets. If temperatures drop towards freezing, wet mix turns brittle instead of bearing tonnes of masonry load. Rushing masonry work during winter frost invites hairline cracking later.
Hot summer days dry out masonry dust instantly. Dry mortar dust hangs in stagnant air and creeps through closed internal doors. We seal off internal thresholds with heavy polythene screens and keep industrial air scrubbers running near open masonry cuts.
Long steel sections require careful manual handling from delivery flatbeds into your hallway. Parked cars along narrow residential avenues can block crane lorries from setting outriggers securely. We survey kerbside access beforehand so steel moves steadily onto sturdy dollies without scraping your boundary walls.
If you're considering opening up your ground floor or connecting a new extension to your current home, we are prepared to assist you through every step of the process. From initial RSJ assessments and structural engineer's calculations to temporary propping, building control notifications, and final touches, we handle it all under one roof. With over 20 years of structural experience, our team provides the precision and accountability your project requires. Contacting us is the first step toward achieving a structurally sound and beautifully resolved outcome.
Each RSJ installation we begin starts with a comprehensive understanding of your property and what you hope for in the space. We directly follow an approved structural engineer's calculations, ensuring each RSJ is specified, supplied, and installed to the highest technical standards. Our process is clear from the beginning, covering everything from the initial estimate and formal contract to project completion and final accounting. Reach out today to set up a consultation and receive a well-considered assessment of your structural needs.
We operate in Trowbridge and its surrounding areas, offering local RSJ installation services. You can easily reach us for phone consultations or to schedule an on-site visit.
approx. 25 milesDistance from our base · Henbury
Call us+44 7723 542170Email usinfo@muchaconstruction.co.ukWe serve your areaTrowbridge and the surroundings
The Google map loads after you accept marketing cookies.
Our Services
One team, from groundworks to final finish. New builds, extensions, loft conversions and full renovations.
New homes built to the engineer's calculations and signed off at every stage.
See more
House and kitchen extensions that add space, light and lasting value.
See more
Dormer, hip-to-gable and mansard conversions that turn lofts into rooms.
See more
Full renovations and modernisations, from HMOs to tired homes made new.
See more
RSJ installation, core drilling and crack stitching, built to proper standards.
See more
Kitchens, bathrooms and wet rooms finished with care and clean detail.
See more
Plumbing, electrics, ventilation and heating handled by one coordinated team.
See more
Ongoing building maintenance for landlords, investors and managed properties.
See moreOUR PROJECTS
Each project by our Construction Company leaves clients with refined spaces, enduring quality, and elevated comfort.
Mucha Construction Ltd delivers Construction Company services within a precise 20-mile radius of Bristol.
Ask if they routinely coordinate with council inspectors and handle their own masonry padstones. Inquire whether their team manages temporary load supports directly or subcontracts that critical step out to unknown third parties.
People frequently purchase a reclaimed steel beam online before consulting structural calculations. An undersized beam bends under upper floor loads, while an oversized flange sits too low and ruins your ceiling height.
Price varies because foundation strength under the bearing points differs between houses. One property requires deep concrete underpinning beneath padstones, while a neighbouring build features solid footing capable of taking an RSJ in Trowbridge right away.
Gather your engineer calculations, architectural sketches, and note whether the floor above carries timber joists or heavy concrete slabs. Clear photos of the wall, subfloor, and access paths help immensely.