Insulate and waterproof contiguous and secant piled basement walls — spray foam follows the uneven pile faces no board can. Installed UK-wide.
Basement retaining walls formed from contiguous or secant piling present a uniquely awkward surface. The pile faces are irregular and ribbed, with gaps, projections and an uneven concrete profile that no rigid board can follow. Below ground, these walls are a major cold bridge into the basement, and the cold, damp internal face readily forms condensation — a serious problem for occupied or fitted-out basement levels.
Enverge closed-cell spray foam is applied straight onto the raw pile faces, expanding into every flute, gap and projection before curing rigid. It self-bonds to the concrete piling as it sets, with no need to first build a flat substrate to fix boards to. The continuous, contour-following layer insulates the wall and seals its surface, breaking the below-ground cold bridge and keeping the internal face dry.
The result is a basement retaining wall that no longer drives condensation or heat loss, with a sealed, insulated face ready for the planned internal build-up. It removes the cost and lost floor space of framing out a flat surface, and turns an irregular, cold, damp-prone piled wall into a controlled, dry thermal envelope.
Expands into the flutes, gaps and projections of contiguous and secant pile faces that boards can't follow.
Insulates the buried retaining wall, cutting the cold bridge that chills fitted-out basement levels.
Low-permeability foam keeps the cold piled wall dry, stopping condensation on occupied basements.
Self-bonds straight to raw piling — no framing-out to create a surface for fixing boards.
A thin bonded layer follows the wall instead of a framed build-up that eats into basement area.
Continuous application copes with the uneven, ribbed concrete typical of piled retaining walls.
Foam sprays directly onto the uneven pile faces, sealing and insulating the below-ground wall completely.
Applied directly to raw contiguous or secant pile faces, Enverge closed-cell foam expands into the ribbed, irregular profile and cures rigid, self-bonded to the concrete. Its low-permeability closed-cell structure insulates the below-ground retaining wall and seals its surface, breaking the cold bridge and keeping the internal face dry ahead of the basement's internal build-up.
Typical published values for Enverge Nexseal LE closed-cell foam. Full technical specification →
Below-ground and underfloor spaces are hostile to boards: irregular pile faces, tight crawl voids and damp-prone surfaces leave gaps everywhere. Sprayed closed-cell foam is applied at 25–100 mm directly onto the irregular surface — sheet piling, retaining walls, blockwork or floor joists — sealing cold bridging and carrying its own vapour barrier.
Because the applicator sprays in-situ, compromised voids that could never be boarded out are insulated completely, sealing draughts up into the building and bringing the below-ground envelope up to specification in a single visit.
Tell us about your piled walls & building.
Free survey of your piled walls & condensation check.
The right system for your piled walls.
Approved applicators, minimal disruption.
Handover pack & 25-year warranty.
Underside of a car-park deck sealed and insulated in-situ.
Concrete soffit spray foam eliminating cold-bridging.
Cavity-filling spray foam for an airtight commercial partition.
Send us your building details and our technical team will specify the right system and a clear budget. No obligation.
Yes. Enverge closed-cell foam is sprayed straight onto the raw pile faces, expanding into the flutes, gaps and projections and self-bonding to the concrete as it cures. There is no need to first frame out a flat substrate, so it suits the irregular profile of piled walls.
Yes. Piled basement walls are a below-ground cold bridge, and their cold internal face readily condenses. The low-permeability foam insulates the wall and raises its surface temperature, keeping the internal face dry — important for occupied or fitted-out basement levels.
Generally yes. Because the foam bonds straight to the irregular piling and follows its contours, you avoid framing out a flat surface for boards, which would otherwise project further into the room. A bonded foam layer keeps more usable basement floor area.
Closed-cell foam is low-permeability and resists moisture, making it well suited to the cold, damp conditions of a basement retaining wall. It should be specified as part of a wider basement waterproofing and build-up strategy, which we coordinate with the design team.
The cured foam provides a sealed, insulated face ready for the planned internal build-up — for example an independent lining or finishing system. We coordinate the foam application with the basement's waterproofing and fit-out design so the following trades have a sound base.
Usually yes — spray application needs far less working room than boarding out, and the foam seals surfaces boards can't reach.
No — closed-cell foam has an integral vapour barrier, one of the reasons it's specified below ground.
Typically 25–100 mm depending on the target U-value and the structure — specified after survey.
Specialist commercial spray foam, installed UK-wide by the Duratite Group's spray foam specialists.
Book a Free Survey →or call 01208 832 602