Source: https://tendernation.io/opportunities/01a13bdb-36b5-7371-a5e8-a942d780d936/preliminary-market-engagement-for-thermal-improvement-works pending GB open procedure Suitable for SMEs # Preliminary Market Engagement for Thermal Improvement Works [Trivallis](https://tendernation.io/buyers/trivallis) Estimated value £30,000,000 Published 10 Apr 2026 Deadline Rolling deadline ## Who can bid - Buyer says suitable for SMEs The buyer ticked “suitable for SMEs” on the notice. Anyone can still bid. - Sets up a framework Winning a place does not guarantee work: contracts are awarded later as call-offs, and the list usually stays closed for years. - Open procedure Anyone can submit a full tender; there is no shortlisting stage. [More contracts for small businesses and VCSEs](https://tendernation.io/opportunities/for-small-businesses) ## About this tender Trivallis will be undertaking Preliminary Market Engagement (PME) for forthcoming Thermal Improvement and Whole-House Retrofit Works. The PME event will take place on 6 May 2026, from 1:00pm to 4:00pm, at: The Muni Arts Centre, Gelliwastad Road, Pontypridd, CF37 2DP. Attendance is limited to two representatives per company. Suppliers must already hold PAS 2030 accreditation, or be on track to complete accreditation (or an industry recognised equivalent) by 30 June 2026. To confirm attendance, please email by 12:00pm on Friday 24 April 2026, including the names and email addresses of all attendees. Please note that entry will not be permitted without advance confirmation. During the session, Trivallis will present information to contractors interested in bidding for future procurement opportunities. A market questionnaire will also be issued to gather feedback to help shape: - The development of our requirements and procurement approach - The design of the procurement procedure, participation conditions and award criteria - Preparation of tender documents and specifications - Identification of capable contractors - Development of contractual terms - Capacity building within the contractor market The deadline for returning the completed questionnaire is 12:00pm on Friday 22 May 2026. The future programme is expected to include a range of whole house retrofit measures, delivered in line with Standard Assessment Procedure (SAP) methodology and PAS 2035 principles. Works may include, but are not limited to, the following: ### Fabric Improvement Works - Wall insulation (cavity, external and internal) - Loft, roof and roofing thermal improvements - Draught proofing and other SAP eligible fabric upgrades - External dash/render ### Low Carbon and Energy Efficiency Installations - Air Source Heat Pumps (ASHPs) - Hot water system efficiency improvements (cylinders, pipework, controls) - Solar PV (including removal and reinstatement) and battery storage ### Ventilation, Lighting and Environmental Improvements - Ventilation upgrades and passive ventilation - Energy efficient lighting - Environmental/performance monitoring sensors Supporting works necessary to enable delivery of retrofit measures, such as: - Rainwater goods replacement - External envelope repairs - Cavity extractions and damp related works (including DPC cleaning) - Building works, access and reinstatement, including canopy renewals & concrete lintels - Roofing renewals - Gas/electric meter boxes - Western Power-related works - Stitching and wall ties The scope may also include PAS 2035 roles and deliverables, such as: - Retrofit Assessment - Retrofit Coordination and compliance services - Design and specification development Trivallis may procure PAS services and installation works separately. All potential works will be delivered to residential properties owned by Trivallis across the South Wales region. Read full description ## CPV classification Thermal insulation work Roof insulation work Insulation work Roof Doors Installation of doors and windows Installation of doors and windows and related components Source Find a Tender (UK) · Notice ocds-h6vhtk-068038-2026-04-10T15:33:03+01:00 [View official notice](https://www.find-tender.service.gov.uk/Notice/ocds-h6vhtk-068038-2026-04-10T15:33:03+01:00) Never miss a tender like this again Get AI summaries, deadline alerts and a bid pipeline for tenders matched to your business. Free to start. [Track tenders free](https://tendernation.io/register) [Buyer profile Trivallis: past awards and live tenders](https://tendernation.io/buyers/trivallis) [Sector More Construction work tenders](https://tendernation.io/sectors/construction-work) ## More tenders like this [Bannister Sports Centre Athletic Track Soft Market Testing Exercise · Harrow Council · 38 days left · 26 Nov 2026](https://tendernation.io/opportunities/01a1540d-d9e4-71cb-ad57-1603e9042fec/bannister-sports-centre-athletic-track-soft-market-testing-exercise) [Building construction work – Budowa budynku mieszkalnego wielorodzinnego wraz z infrastrukturą techniczną w miejscowości Szczucin · KZN SIM Tarnów Sp. z o.o. · 7 days left · 26 Oct 2026](https://tendernation.io/opportunities/01a156a9-d859-7328-9ee6-a304ce645326/poland-building-construction-work-budowa-budynku-mieszkalnego-wielorodzinneg) [Plastering work – Modernisierung und Erweiterung Matthias-Claudius-Heim Würzburg · Diakonisches Werk Würzburg e.V. · 1 day left · 20 Oct 2026](https://tendernation.io/opportunities/01a156a9-e605-706f-8937-7f0ba18339c0/germany-plastering-work-modernisierung-und-erweiterung-matthias-claudius-hei) [Floor-covering work – Universität Leipzig, Leuschnerplatz, Global Hub, Forschungsneubau · Staatsbetrieb Sächsisches Immobilien- und Baumanagement, Zentrale, Zentralstelle Vergabe- und Vertragsmanagement · 3 days left · 22 Oct 2026](https://tendernation.io/opportunities/01a156a9-acfc-73ee-baab-9e699f88521a/germany-floor-covering-work-universitat-leipzig-leuschnerplatz-global-hub) [Heating plant construction work – Petrašiūnų elektrinės elektrifikacija, įrengiant elektros energijos kaupimo įrenginius, dyzelinį generatorių ir rekonstruojant 6 kV skirstyklą (projektavimas ir rangos darbai) · Akcinė bendrovė „Kauno energija“ (PV) · 7 days left · 26 Oct 2026](https://tendernation.io/opportunities/01a156a9-6f1d-727f-a077-bc25dec93b92/lithuania-heating-plant-construction-work-petrasiunu-elektrines-elektrifikac) [Demolition work – Rück- und Neubau Lichthochmaste · Hamburg Verkehrsanlagen GmbH · 7 days left · 26 Oct 2026](https://tendernation.io/opportunities/01a156a9-6ef0-7276-94e2-d5fa0cb2d6c7/germany-demolition-work-ruck-und-neubau-lichthochmaste)