---
title: "ITT - Investigation into case studies of AVCLs installed in buildings of traditional construction - UID 333M"
ocid: "ocds-h6vhtk-06f8ff"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-h6vhtk-06f8ff"
markdown_url: "https://d3tenders.com/contract/ocds-h6vhtk-06f8ff.md"
json_url: "https://d3tenders.com/contract/ocds-h6vhtk-06f8ff.json"
source: "Find A Tender Service"
current_stage: "Tender"
buyer: "Historic England"
published: "2026-09-14"
---

# ITT - Investigation into case studies of AVCLs installed in buildings of traditional construction - UID 333M

Buyer: Historic England  
Current stage: Tender  
OCID: ocds-h6vhtk-06f8ff

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## Summary

Historic England is commissioning research into air and vapour control layers (AVCLs) retrospectively installed in English buildings of traditional construction. The work will examine a selection of building case studies and report on the findings, including positive and negative consequences of the installations. Its purpose is to improve knowledge and inform future guidance on the suitability of fitting modern technologies into traditionally constructed buildings, following an earlier literature review. This is a services requirement covering structural engineering consultancy, research and research consultancy. The work is for Historic England, a central government public authority, and concerns traditionally constructed buildings in England. The commission will suit organisations able to investigate building retrofit case studies and produce clear evidence-based findings relevant to conservation and technical guidance.

The process has reached tender: Historic England invited offers through a below-threshold open competition. Bids may be submitted electronically. The deadline for enquiries was 5 October 2026 at 9:30am, and the tender submission deadline is 12 October 2026 at 9:30am. The contract is scheduled to run from 2 November 2026 to 15 March 2027. It is divided into one lot. The published total estimated value is £15,000 excluding VAT, or £18,000 including VAT. The lot value is also published as 15,000 AED, with 18,000 AED including VAT. Evaluation is based on price weighted at 40% and quality weighted at 60%. The work is a services procurement and the tender is below the relevant threshold.

This opportunity suits a specialist research consultancy, structural engineering practice or multidisciplinary building-performance team with experience examining retrofit in traditionally constructed or historic buildings. Strong candidates will be able to identify and assess relevant AVCL installations, select and interpret case studies, investigate the consequences of installation, and distinguish positive outcomes from defects, risks or unintended effects. The requirement also favours suppliers able to combine practical building knowledge with robust research methods, evidence review and concise technical reporting. Experience translating research findings into guidance for professionals working with traditional construction would be directly relevant. Organisations with capability across conservation, building physics, moisture or retrofit assessment may be well placed where that expertise supports the required case-study investigation and report.

## Notice

Historic England is looking to support research which will inform guidance on the suitability of retrospectively fitting modern technologies into English buildings of traditional construction. Following the publication of an earlier literature review, this project aims to help fill the gaps in current knowledge by offering insight into traditionally constructed buildings which have been retrofitted with AVCLs (Air and Vapour Control Layers). The project will review a selection of case studies and report on the findings, including any positive or negative consequences, of the installations. Full details can be found in the invitation to tender.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Find A Tender Service |
| Latest notice | https://www.find-tender.service.gov.uk/Notice/086818-2026 |
| Notice type | UK4 - Tender Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Open |
| Procurement method details | Below threshold - open competition |
| Tender suitability | Not specified |
| Awardee scale | Not specified |
| All stages | Tender |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 14 Sep 2026 |
| Submission deadline | 12 Oct 2026 |
| Future notice date | Not specified |
| Award date | Not specified |
| Contract period | 2 Nov 2026 - 15 Mar 2027 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £15,000 |
| Lots value | £15,000 |
| Awards value | Not specified |
| Contracts value | Not specified |

## Status

| Field | Value |
| --- | --- |
| Tender status | Active |
| Lots status | Active |
| Awards status | Not specified |
| Contracts status | Not specified |

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | Historic England |
| Locality | SWINDON |
| Postcode area | Swindon |
| Postcode | SN2 2EH |
| Country | England |
| ITL 1 | TLK South West (England) |
| ITL 2 | TLK7 Gloucestershire and Wiltshire |
| ITL 3 | TLK71 Swindon |
| Local authority | Swindon |
| Electoral ward | Mannington and Western |
| Westminster constituency | Swindon South |
| Delivery location | Not specified |

## CPV Codes

### Divisions

- 71 - Architectural, construction, engineering and inspection services
- 73 - Research and development services and related consultancy services

### Codes

- 71312000 - Structural engineering consultancy services
- 73110000 - Research services
- 73210000 - Research consultancy services

## Release History

- 14 Sep 2026 at 12:16 - Tender - UK4 - Tender Notice - https://www.find-tender.service.gov.uk/Notice/086818-2026

## Documents

- https://www.find-tender.service.gov.uk/Notice/086818-2026
  14th September 2026 - Tender notice on Find a Tender

## Notice URLs

- https://supplier.in-tend.co.uk/historicengland/home
- https://www.legislation.gov.uk/ukpga/2023/54/contents

## Provenance

This Markdown file is an alternate public rendering of the D3 Tenders contract record. The canonical page is https://d3tenders.com/contract/?ocid=ocds-h6vhtk-06f8ff. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-h6vhtk-06f8ff.json.