Product · Building Envelope
Product · InnDex 62 · Evidence provided · High specification risk
Non-combustible silica aerogel blanket for thin, high-performance facade retrofit with A1 fire rating.
Spacetherm A1 is a silica aerogel insulation blanket targeting the retrofit gap where thermal performance and fire safety conflict in ventilated facades. Conventional mineral wool and PIR struggle to deliver both simultaneously within tight space budgets. The product claims 0.015 W/mK conductivity (among the lowest in commercial insulation) while meeting A1 non-combustibility, enabling thinner build-ups and higher U-value gains in constrained retrofit scenarios. Deployed commercially across UK market with documented installations and active distributor stocking.
Spacetherm A1 is a silica aerogel insulation blanket targeting the specific retrofit scenario where conventional insulation fails: a ventilated facade with tight space budget, fire safety obligations (requiring A1 non-combustibility), and a meaningful thermal performance target in limited thickness. The claimed 0.015 W/mK conductivity is among the lowest available in commercial insulation and would, if independently verified, make it genuinely compelling for that constrained geometry. The problem is the verification gap: the thermal performance claim rests on manufacturer data only, with no BBA, ETA, or CE/UKCA certification on record — a high-severity con for a structural thermal claim that a specifier or building control officer will need to substantiate. A. Proctor Group distributor availability reduces procurement friction, and the A1 fire rating is the real product differentiation over PIR in this application, but the absence of third-party certification leaves the core performance argument undefended. Aerogel is also brittle and friable, requiring protective installation detailing and site discipline beyond what mineral wool demands, and long-term moisture behaviour and durability in UK external exposure conditions are not fully characterised. Cost premium versus mineral wool is not disclosed but is structurally inherent to aerogel production. The product is solving a real problem — the fire-safety-versus-thermal-performance conflict in ventilated facade retrofit — and deserves attention on that basis, but the specification case stalls until independent third-party certification is available.
Commercial deployment confirmed: active stocking by multiple UK distributors and documented installations (Great Charles Street Birmingham cited). A1 fire classification credible and typical for aerogel products. Critical gap: thermal conductivity claim (0.015 W/mK) stated only on manufacturer website with no independent accreditation. CCPI (Construction Certification & Practice Institute) assessment is the sole third-party reference; absence of BBA, ETA, or UKCA/CE declaration is material for a building product making specific thermal performance claims. No evidence of durability testing, water absorption behavior under condensation risk, or long-term performance in ventilated cavities. Cost premium vs. conventional PIR/mineral wool not disclosed but likely substantial given aerogel material costs.
#aerogel #retrofit #fire-rated #thermal-insulation #facade #thin-profile #A1-classification