Customer Testimonals

For information on the various awards that Denval and its teams have won please follow this link:  Awards

Mark Styles Watkin Jones


The consistent high standards of H&S practices displayed by Denval during my visits to the project are excellent.


One of the struggles of trying to promote a positive H&S culture on projects is contractors negative approach, sighting some H&S practices as ‘over kill’ & something that slows works down.


My argument to this is to show how contractors like Denval work. PPE adherence displayed by Denval trades working on the project are exemplary, with not one trade having to be reminded about wearing gloves or glasses. It is apparent to me that the trades working on the project know the importance of wearing the correct PPE & the positive aspects of how it protects them.


There are absolutely never any issues with the standard of equipment trades use for carrying out works at height, with all equipment conforming to the standards required & an up to date tag inspection system in place. This ranges from hop ups, step ladders to PASMA scaffolding.


On discussion with Richard I had asked if there were any issues with the quality of works taking place or finishing works on time due to the extra effort & time taken with H&S by Denval, to which his reply was a categoric, ‘No’.


This proves that a positive attitude to H&S enhances both quality & productivity whilst ensuring trades remain safe when carrying out works within a busy construction environment


Well done so far to everyone involved






Philip Stephens BECT Building Contractors

I'm glad to report that the client took the building this morning. I would like to echo their comments in stating that the product you guys have produced in testing conditions is immense.


The facade looks incredible and reflects the hard work and teamwork that has gone into it.

I am looking forward to working with you chaps again.


Gareth Williams Willmott Dixon



After monitoring the achievements made by Denval in the region on various substantial projects, we were happy to engage them in the delivery of a major construction project of ours namely Finzels PRS, on behalf of our client Cubex.

From initial discussions on design and programming, we have found Denval to be forward thinking, proactive and extremely cooperative. Their diligence on site performance has been exemplary, so much so they were awarded supply chain partner award for the project. Their collaborative approach has been a refreshing aspect to deal with, and has helped on many occasions when situations have arisen that needed our joint team effort to overcome the difficulties presented to us.

We would have no hesitation in going forward with Denval on to the next phase of this development, for which I'm sure we would have the client's full support and agreement.


Gareth Smart JR Smart Builders



Since 2012 we have engaged Denval on our Capital Quarter Development undertaking five separate buildings including windows , doors, curtain walling and cladding with a combined value of approximately £l2,000,000 and therefore needless to say we have been extremely satisfied with the level of service, professionalism and delivery received while working with Denval.

They have been extremely pro active in the pre design stage engaging with our architects and local planning authority to enable us to achieve our desired proposals.

We are currently on site with our latest project The John Street Development and have engaged Denval in detailed design workshops, construction of sample curtain walling bay and cost planning. This latest project has an estimated envelope package of circa £4 million.

We would not hesitate to recommend the Denval team having worked so closely with them over the last eight years and look forward once again to our working relationship going forward on our latest project.


Sean O'Brien Formation Group


We have been working with Denval for a number of years on various residential developments in the London Area, and we now consider them our 'go to' company for windows, doors and curtain walling.


One key benefit to our business is their openness to adding new and bespoke items to their product range to suit each project, with them having undertaken Juliet balconies, glass balustrades, continuous louvre systems as well as rainscreen cladding on our schemes in the past.


Their team are professional and helpful, and their ability to adapt site programs to accommodate changes without being over contractual is a real bonus in enabling us to complete our projects on time.


They are in the process of completing their works at Ghandi House (E3 million package) and last year completed Wembley West One (E3.5 million package). Both schemes were delivered on budget and ahead of program.


They are also currently assisting us with tenders for a number of similar schemes, that we hope will soon form part of our order book.



Serj Azarian Construction Director of Valco


I would like to take this opportunity to express my opinion on the performance of Denval firstly as a company and secondly their quality of workmanship.


On a particularly difficult build project for Valco regarding design and programme at E.02 Cardiff, Denval have been outstanding from the initial value engineering stage as we had difficulties in meeting the budget for the external envelope. The biggest advantage for Valco has been the fact that Denval found cost effective solutions and have designed, installed and coordinated most of the building envelope including Curtain Walling, Rain Screen and Solar Shading.


As any contractor can appreciate this has been beneficial from a site management point of view and avoidance of any overlap delay or cost which may have occurred if separate contractors were to be used for each trade.


The site teams for installation are very experienced crews, which have demonstrated outstanding finishes to all their works which has been reflected in the client’s snag list.


In general, I would have no hesitation in recommending Denval to any contractor or developer to carry out the entire envelope works on a project.


Lennart Jonsson, Director of Senior Architectural and Glass systems

I must tell you, your guys have made you really proud. The roof and door at Pemberton Road are superb. The welding work and powder coating on the guttering is a work of art and all the aluminium work is fantastic. The fitting is also first class. 

Thank you ever so much for helping me with this and also the short time you manage to complete this job.





Nick Campfield Hg Construction Mile End Road London


Just a note to say that the glazing unit replacements to the rear elevation of the building have been completed to the time schedule agreed with the client. The works proceeded like clockwork with minimum disruption.


Credit to Alex and his site team for completing a difficult task and making it look easy. I had no calls or e-mails from the client after the 1st day which is a record in itself! Thank you much appreciated.


Julian Anderson Project Manager Kier Western and Wales


We have engaged Denval at Waitrose Cowbridge to design, supply and fit curtain walling including fire exit doors as well as automatic sliding doors. I have found them to be proactive and helpful during the design stage which has enabled a timely turn around in manufacture. They have been quick to act on architect's change of detail without being overly contractual. 


Their site team were second to none incorporating Kiers high standards of Health and Safety as well as their program and quality awareness. Over all Denval have been found to be a quality operator and I would welcome working with them again


Jamie O'shea Project manager for Leadbitter, Tremough Project


Denval are completing a project for us in Tremough Campus in Cornwall, due for hand over next month.


 The building was designed by Burwell Deakin Architects and includes roof lights, automatic louvered windows, curtain walling and sliding doors.

Leadbitter invested time at the early stages of the project vetting Denval including visiting their premises in Wales as this region had no experience of using them before.


 Denval provided a dedicated design manager to the project, have been performing well on site and I would be happy to use them again



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