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Closed-cell spray foam that controls condensation, prevents structural damage and reduces energy costs in pool environments. With water at 28–32°C driving constant evaporation, pool halls run at 50–70% relative humidity — rising to 90%+ at ceiling level. Nexseal LE’s integral vapour barrier handles these extreme conditions.
Swimming pool halls are among the most demanding environments for any insulation system. Nexseal LE is a closed-cell spray foam — performance declared to I.S. EN 14315-1 — with an integral vapour barrier that handles these extreme conditions. With a lambda value of 0.027 W/m·K, it bonds directly to steel, timber glulam beams, concrete soffits and masonry walls — creating a seamless thermal and moisture barrier that traditional materials simply cannot match.
Why pool environments destroy traditional insulation: PIR boards, rockwool batts, polystyrene sheets and rigid boards were never designed for sustained high humidity. In a pool hall they face constant exposure to warm, moisture-laden air that penetrates joints, fixings and any gap in the vapour barrier.
Over time, traditional insulation absorbs moisture, sags under its own weight, delaminates from fixings and grows mould. Condensation drips from the ceiling into the pool water, disrupting water chemistry and creating hygiene concerns. Steel beams and roof fixings corrode behind the failing insulation where damage cannot be seen until it becomes structural.
From hotel pool halls to residential pool rooms and external pool basins — we work with pool builders, leisure operators and facilities managers across Ireland and Northern Ireland.
The most critical area — ceilings take the full force of rising humid air. Foam sprayed to soffits, between purlins or glulam beams, and around all services.
Foam bonds to masonry, blockwork, steel framing and concrete panels — especially effective on external walls where cold bridging causes condensation streaks and mould.
External basin insulation for fibreglass shells, concrete basins and below-ground pools — less heat loss through the structure, protection against ground moisture.
The ideal time to insulate. Foam applied before cladding or lining gives a continuous thermal and vapour barrier from day one — specified with architects and pool builders.
Warm pool water evaporates constantly, driving moisture up to the ceiling where it condenses on cold structural surfaces. Here is how Nexseal LE solves every aspect of the problem.
Foam raises the roof surface temperature above the dew point. No cold surface for moisture to condense on means no dripping onto pool users, walkways or equipment.
The integral vapour barrier blocks moisture migration completely — even at 90%+ relative humidity at ceiling level.
Steel beams, purlins and fixings corrode rapidly in humid pool halls. Foam seals these elements from moisture, dramatically extending roof structure life.
Ceiling drip introduces contaminants and biological matter into pool water. Eliminating it helps maintain stable chemistry and cuts chemical treatment costs.
Warm, damp surfaces are ideal breeding grounds for mould and mildew. Keeping surfaces dry and above the dew point removes the conditions mould needs.
Pool halls lose enormous heat through roofs and walls. Foam dramatically reduces this — typically saving 20–40% on energy costs.
Closed-cell foam is its own vapour barrier — no separate membrane to install, tear or fail, which is critical where humidity makes conventional vapour barriers unreliable. At lambda 0.027 W/m·K, 50mm of Nexseal LE outperforms 100mm of rockwool or 75mm of PIR board.
Pool halls are full of pipework, ductwork, cable trays and lighting — foam flows around every obstruction with no cutting, gaps or cold bridges. It seals steel and timber glulam from moisture exposure, and once applied it performs for the lifetime of the building through decades of humidity, temperature cycling and pool chemical exposure.
See how Nexseal LE closed-cell spray foam compares to traditional insulation methods commonly used in swimming pool buildings.
| Property | Nexseal LE Spray Foam | Traditional (Rockwool / PIR / Rigid Boards) |
|---|---|---|
| Vapour Permeability | Integral vapour barrier — near-zero permeability | Requires separate membrane, prone to failure at joints |
| Moisture Absorption | Nil — closed-cell structure repels water | Absorbs moisture, loses thermal performance over time |
| Adhesion to Substrate | Bonds permanently to steel, timber, concrete | Relies on fixings — can sag, delaminate or fall |
| Coverage Around Beams/Services | Fills every profile seamlessly | Cut to fit, gaps around beams and services inevitable |
| Condensation Control | 100% — eliminates ceiling drip | Condensation forms behind insulation and at fixings |
| Lambda (W/m·K) | 0.027 | 0.034–0.044 |
| Structural Corrosion Risk | Steel/timber sealed from moisture | High — trapped moisture corrodes steel structure |
| Mould Resistance | Does not support mould growth | Damp insulation promotes mould and mildew |
| Longevity in Pool Environment | Lifetime of building — no degradation | Typically fails within 5–15 years in pool halls |
| Installation Speed | Pool hall in 2–5 days | 1–3 weeks of cutting, fitting, fixing and membrane sealing |
We assess the pool building — roof structure, wall substrates, current insulation condition, humidity levels, ventilation systems and access requirements. This determines the correct specification.
We specify the Nexseal LE thickness based on the building’s construction, environmental conditions and Building Regulations. A fixed-price quotation covers the full project scope and timeline.
Trained applicators spray Nexseal LE to roof soffits, between beams, across walls and around all services. Foam cures in minutes — no drying time, minimal disruption to pool operations.
You receive a completion pack with thickness verification, product datasheets and warranty documentation. The pool environment benefits immediately.
Duratite projects in the UK and Northern Ireland, completed by approved installers.
Complete ceiling and wall insulation of the hotel pool hall. Old ceiling panels removed and replaced with Nexseal LE sprayed between steel beams and across the soffit. Condensation drip eliminated, steel protected, heating costs cut significantly.
Spray foam applied between timber glulam roof beams during construction of a new public pool. The architect specified closed-cell foam for its combined insulation and vapour barrier — no separate membrane system, and a shorter construction programme.
External insulation of a residential pool basin and shell during a garden pool installation. Nexseal LE sprayed to the basin walls and underside, around pipework and filtration penetrations — reduced heat loss and ground-moisture protection.
Nexseal LE applied to pool hall ceilings — bonding to steel beams, glulam timbers and concrete soffits.
As an authorised distributor of Enverge spray foam systems, Duratite supplies the products and technical backing; installation is carried out by our network of trained, approved applicators.
Factory-direct supply of Nexseal LE with full manufacturer backing, technical support and warranty coverage.
Every installer in our network is factory-trained on Enverge equipment and holds current spray foam qualifications.
No surprises. Every project is surveyed and quoted at a fixed price before any work begins. Free surveys across Ireland and Northern Ireland.
Nexseal LE performance is declared to I.S. EN 14315-1 — backed by a 25-year manufacturer product warranty.
Duratite has delivered spray foam insulation since 2015 across commercial, residential, agricultural and specialist applications including swimming pools.
We insulate pool halls at hotels, leisure centres, schools and private residences across Ireland and Northern Ireland.
Independently certified products — tested to published standards. Email info@duratite.ie.
Common questions about spray foam insulation for swimming pools, pool halls and leisure centres.
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Learn more →Book a free pool survey or request a callback from our specialist pool insulation team. We work with hotels, leisure centres, schools and private pool owners across Ireland and Northern Ireland.
Thermal calculations, humidity assessment and a fixed-price quotation.
Mon–Fri 8am–5pm · info@duratite.ie
Tell us about your building and we’ll recommend the right system — foam, waterproofing or both — surveyed, specified and quoted at no cost.
Fire rated spray foam for car park and building soffits.
Airtight insulation between timber or metal studs.
Cut energy costs and stop condensation in warehouses.
Condensation control and thermal insulation for boats and marine vessels.
Seamless spray foam membrane for flat roof applications.
Explore all commercial spray foam insulation applications.
