Canvas Stretching Services in London
info@seidoartservices.com // 07547323641
A canvas is a constructed object as much as it is a painted surface, held under tension across a wooden frame, and that construction is exactly what makes it vulnerable during a move or an installation. Seido Art Services provides professional canvas stretching and unstretching for artists, collectors, galleries and interior designers across London, handling the process with the same precision and care we bring to any fine art installation.
On-Site Unstretching and Restretching
The most common reason we're called in is access. A large canvas that was stretched in a studio doesn't always fit through the doorway, stairwell or lift of the building it's being delivered to, and forcing it isn't an option. In these situations, we attend on-site, carefully remove the canvas from its stretcher bars, protect it appropriately for the move through the restricted space, and restretch it once it's in position. This comes up regularly in private residences, apartment buildings, commercial offices and gallery spaces where the building's architecture, rather than the artwork itself, is the limiting factor. Once repositioned, we restretch the canvas to the correct tension and check its alignment and structural stability before it's prepared for hanging.
Handling and Protecting the Canvas
Every stretching project follows the same handling standards, whatever the value or scale of the piece. We lay a canvas down only on clean, protective material, so a painted or raw linen surface never contacts an unprotected floor or table, and we wear protective gloves when handling any surface where oils, dirt or fingerprints could transfer from bare hands. Tensioning is done gradually and checked continuously, since over-stretching a canvas can stress the painted surface in ways that aren't always visible immediately. Even minor contamination or handling damage can create a long-term conservation problem rather than a cosmetic one, which is why we treat these precautions as standard practice rather than something reserved for particularly valuable pieces.
Supplying and Measuring Stretcher Bars
Where new stretcher bars are needed, the measurement stage matters more than it might seem. A stretcher that's even slightly out of true will show as uneven tension or a warped canvas once assembled, so we generally attend in person to take precise measurements before ordering, confirming the correct size, corner alignment and depth for the specific piece. Where required, we assemble and square the stretcher bars on site, so the canvas goes onto a frame we've already checked is accurate, rather than adjusting for a fault after the fact.
Installation Following Stretching
Once a canvas is properly restretched, we can move directly into installing it securely in its intended location, assessing the wall type and choosing fixings appropriate to the piece's finished weight and size. As with the stretching process itself, this is carried out to the same standard we apply across residential, commercial and gallery settings.
How the Process Works
We start with a conversation about the piece, the access constraints involved, and where it's going, and where necessary we'll arrange a site visit to check doorways, stairwells and the final installation point before quoting. Once a quotation covering labour, materials and any stretcher bar supply is agreed, our technicians carry out the unstretching, careful transport and restretching on site, fitting new stretcher bars where needed. Once the canvas is properly tensioned and installed, we review the final placement with you before considering the job complete.
Why Clients Choose Us for Canvas Stretching
Stretching a canvas well is a technical process with very little room for error, since a mistake at this stage can affect the artwork permanently rather than just the presentation. Clients come to us because our technicians are trained in careful handling of painted and linen surfaces specifically, not just general art installation, and because we combine that with accurate measuring, on-site stretcher bar assembly, and installation as part of a single, coordinated visit rather than several separate appointments. Whether the job is a straightforward unstretch-and-restretch for a stairwell delivery or a more involved job requiring new stretcher bars, we bring the same level of care to a piece regardless of its declared value.
If you need canvas stretching, unstretching for access, or installation in London, contact us to discuss your project.
Frequently Asked Questions
Still have questions? Take a look at the FAQ or reach out anytime.
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Yes, when it's done correctly. Removing a canvas from its stretcher bars is a routine part of the process for pieces that need to pass through restricted access, and it doesn't damage the canvas provided it's handled and restretched properly afterwards.
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Both. We can restretch a canvas onto its existing stretcher bars, or supply and assemble new ones where the original bars are damaged, the wrong size, or unavailable.
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This usually comes down to the size of the stretched canvas against the narrowest point it needs to pass through, typically a doorway, staircase turn, or lift. If you're not sure, we can advise based on measurements you provide, or arrange a site visit to check access before the day of the move.
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Older canvases often need more care than newer ones, since the fabric can be more brittle and less tolerant of tension changes. We assess the condition of the canvas before restretching and adjust our approach accordingly, rather than applying a standard process regardless of age or condition. We would advise you if we think it is unsafe to undertake any unstretching of an antique artwork with lacquer or varnish.
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Canvas stretching can be booked on its own, for example if you need a canvas unstretched purely for transport or storage, or combined with installation as part of a single visit if the piece is going straight onto a wall afterwards.