Steel beam installation, RSJ and structural alterations in Welling. Trusted, professional, 30+ years' hands-on experience.
GS Renovation installs RSJs and steel beams across Welling, where the DA16 streets are lined with 1930s semi-detached and interwar suburban houses on generous plots. With over 30 years of structural experience in Bexley, we remove load-bearing walls safely, from the classic through lounge to open-plan rear layouts, all engineered and signed off correctly.

The wall between the front and back reception rooms in a Welling 1930s semi is almost always load-bearing, carrying the floor joists above and often a chimney breast. Before any demolition, a structural engineer sizes the beam for the span and the loads it must pick up, and we work to those calculations rather than guesswork. Getting the specification right is what keeps the floors and ceilings above sitting solidly for the decades that follow.
On site we install temporary propping to take the load, then carry out staged demolition so nothing is removed before the new steel is ready to bear. The RSJ lands on padstones spread across the masonry to distribute the weight, and we pack and pin the beam tightly to the structure above. Every stage is planned so the interwar house stays stable throughout, with no surprises once the props come out.
Many Welling steel jobs sit close to the party wall shared with the neighbouring semi, and where a beam bears into that shared wall the Party Wall Act applies. you serve the correct notices on the adjoining owner in good time, which keeps the project lawful and the relationship with the neighbour on the interwar terrace next door amicable. This paperwork matters as much as the steel itself on a semi-detached plot.
All beam installations are notifiable work that needs building control, not planning permission, so we submit the engineer's calculations to Bexley Council or an approved inspector for sign-off. The inspector checks the padstones, the bearings and the fire protection to the steel before the completion certificate is issued. That certificate is the document your solicitor and any future buyer in DA16 will want to see, so we make sure it is in place.
Welling homeowners choose GS Renovation because we treat steelwork as a structural discipline, not a quick knock-through. We coordinate the engineer, the propping and the Bexley Council sign-off as one accountable service. With 30+ years in DA16 and the surrounding interwar suburbs, we leave you with a safe opening and the certificate to prove it.
He was very very good. He just got on with the job and we was beey pleased with the result. He Also cleaned everything away when he finished. Will…
Saaid is the best craftsman I have worked with. He knows what he is doing from the very beginning. He has a great knowledge of construction…
George always kept to commitments and arrived on time. He offered helpful suggestions during his initial visit and promptly provided a reasonably…
FAQ
Very, and deliberately so. Quoting RSJ and steel beam installation low to win a Welling job and correcting it later is the commonest complaint homeowners have about builders, and it is not how GS Renovation operates. We survey the DA16 address, itemise, and stand behind the total. Anything genuinely unforeseen is costed and agreed before further work. Ring 07472 424 226 and ask GS Renovation for the DA16 breakdown before you compare it with another Bexley quotation for RSJ and steel beam installation. As a rough guide, RSJ and steel beam installation in London runs roughly £1,500 to £4,000 for the beam itself on a single straightforward opening, covering supply, installation and building control sign-off; a full knock-through including taking the wall out, the structural engineer's fee and making good more typically comes to £2,500 to £6,500 or more (indicative London ranges, MyBuilder and Checkatrade, 2026). Your figure depends on the size, specification and condition of the property, which is why we survey before quoting.
It can, where the internal wall is helping to support what sits above the bay. In your Welling house the bay carries the wall and sometimes a second bay above it on slender piers, and the structure behind occasionally shares that load. The engineer establishes it before designing an opening nearby. Cracking above a bay following internal work usually means something it relied on was removed.
Yes, with the remaining masonry checked carefully. Forming two openings in your Welling house leaves a pier between them carrying the ends of both beams, and that concentrated load is often the critical part of the calculation. The engineer sizes the pier as well as the beams, and may specify a padstone or a post within it. It is not two separate jobs that happen to be in one room.
Rebuilt in matching brickwork and bonded into what remains. Cutting a bearing pocket in a Welling house disturbs masonry around it, and simply packing the gap leaves the beam bearing on something loose. The padstone is bedded solid, the brickwork above is pinned up tight so load transfers evenly, and the surrounding wall is made good before any plastering starts.
The wall in question, what is above it and what is below each end. At a Welling house that usually means access to the room, the floor above and any void or cellar beneath, plus somewhere to open a small area of plaster at the proposed bearings. An engineer who is not shown those cannot do more than estimate, and an estimate is not a structural design.
A few weeks from instruction to a finished room, most of it before anyone arrives. At a Welling property the engineer's design, the building control application and the fabrication of the steel come first, then the structural days on site, then plastering and drying before decoration. The disruptive part is short. The sequence around it is what determines the overall date.
Every Service, One Team
The same trusted team, 30+ years' hands-on experience and free, no-obligation quotes apply to every GS Renovation service in Welling. Explore what else we do locally:
Same Service, Nearby Areas
We carry out RSJ and steel beam installation across Welling and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for RSJ and steel beam installation in Welling. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.