Arc waterproofing


With both our in-house roofing teams and the recent acquisition of Imperial Waterproofing Limited, Arc Group can offer clients a truly comprehensive roofing service.  Our projects range from a single building to national retail chains and industrial buildings.

Arc Waterproofing specialises in complex roof designs, providing a bespoke roofing solution for the most challenging brief. Our in-house team, including a dedicated designer, are happy to work with the architect to finesse a scheme to produce a turnkey design.

All Arc Waterproofing systems are complete packages from membranes/coatings/metal panels through to flashings, maintenance-free edging details, specialist metal fabricating and glazing, penetrations, drainage, rooflights, walkways, and so forth.

Arc Waterproofing can also add aesthetic and environmentally friendly treatments to the main roof itself, such as green roof treatments including green walls and rubber crumb finishes.

Arc Waterproofing can offer a roofing and waterproofing service that is competitively priced and executed to the highest standard, ranging from new roof installations and refurbishments to continuous maintenance programmes.

Drawing on our extensive industry experience, we can ensure your building remains operational during the works while minimising disruption and reducing costs. All of this is delivered by a directly-employed professional team who are passionate about seeing an exceptional job completed safely, to budget and on time every time.


  • Waterproofing: hot melt systems, cold applied liquid systems, PMMA, EPDM, single ply
  • Specialist roof coverings and finishes, including lead, zinc and aluminium
  • Bio and green roof design and installation
  • Brown roof design and installation
  • Bespoke design and secondary steelwork including specialist furniture and accessories

Marlborough School


Marlborough School is a well-supported, long-standing primary school in Chelsea, having been established in 1878.  The school’s increasing pupil roll meant larger premises were necessary; the new building sits alongside the original building, now the school’s administrative and commercial centre.  The teaching block is arranged over five floors and, because it sits on the original playground, the architect made full use of the roof areas to provide games pitches, seating areas and flower beds.  

The school is “autistic-friendly” and part of our remit was to provide an artificial grass floor covering to a special needs classroom to provide a sensory experience for the children.

We were working on site alongside numerous contractors and so our management team had to work closely with other subcontractors and in line with the main contractor’s master programme.

In total, we undertook roofing works to five areas in the main school and created three games pitches, waterproofed two large balcony/terraces and re-roofed the original building.

Furthermore, with a fixed completion date of August so the school could be ready in time for the new 2017/18 academic year, programme slippage was not an option but our team were able to complete their programme of works in plenty of time for handover.