---
title: "Validation of RdSAP U-calculation methodology for traditional stone walls"
ocid: "ocds-r6ebe6-0000751791"
canonical_url: "https://d3tenders.com/contract/?ocid=ocds-r6ebe6-0000751791"
markdown_url: "https://d3tenders.com/contract/ocds-r6ebe6-0000751791.md"
json_url: "https://d3tenders.com/contract/ocds-r6ebe6-0000751791.json"
source: "Public Contracts Scotland"
current_stage: "Award"
buyer: "SCOTTISH GOVERNMENT"
published: "2024-02-01"
---

# Validation of RdSAP U-calculation methodology for traditional stone walls

Buyer: SCOTTISH GOVERNMENT  
Current stage: Award  
OCID: ocds-r6ebe6-0000751791

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## Summary

The Scottish Government has awarded a contract for the validation of the RdSAP U-calculation methodology for traditional stone walls to Building Research Establishment Limited. The procurement process was completed on January 25, 2024. The tender aimed to validate whether the RDSAP 10 calculation method accurately estimates wall u-values for Scottish homes. The contract's value is £63,858 GBP. The procurement falls under the services category and was open for bidding.

This tender presents an opportunity for businesses involved in research and services related to energy efficiency and building assessments. Companies with expertise in u-value measurements, energy performance methodologies, and research in home energy efficiency would be suitable to compete for this tender. The Scottish Government, as the buyer, is seeking to improve the accuracy of energy assessments for stone wall materials in Scottish homes. Businesses can leverage their experience and capabilities in energy performance assessments to contribute to this research and potentially secure contracts for future projects.

## Notice

The Scottish Government wishes to procure research to validate whether the RDSAP 10 calculation method provides an appropriate estimation of wall u-values for Scottish homes. The overarching aim of this research is to: - to measure in-situ U-values for different existing stone wall material types to assess confidence in the current U-value equations published in RdSAP10 to predict Scottish stone wall U-values. - consider whether revisions to the stone wall U-value calculation algorithms are required in future home energy performance methodologies for existing homes.

### Lot Information

Lot 1

The outputs of this work should include: - U-value measurements for all assessed walls. - Assessment of walls following the RdSAP10 methodology. This should be undertaken by an experienced Domestic Energy Assessor. - Following a property survey, a desktop exercise in which lodgement of EPCs includes the calculation of U-values using the new equations (the before case), for each of the sample properties. - Commentary on the relationship between U-values obtained by measurement and calculated values. - Quantification of the impact on RdSAP calculations of any discrepancy between measured and calculated values. - If RdSAP calculated values differ by more than an appropriate error amount as agreed with SG, the Supplier should propose an alternative approach to U-value calculation. - Production of final report, including analysis and interpretation of sample results found, and written presentation of these to Scottish Government in the report.

Renewal: The Purchaser may, by giving notice to the Service Provider, extend the period of the Contract to a date falling no later than 30 April 2024 Subject to that constraint, the Purchaser may extend the period of the Contract on more than one occasion.

## Key Details

| Field | Value |
| --- | --- |
| Publication source | Public Contracts Scotland |
| Latest notice | https://www.publiccontractsscotland.gov.uk/search/show/search_view.aspx?ID=FEB497704 |
| Notice type | PCS Notice - Website Contract Award Notice |
| Procurement type | Standard |
| Procurement category | Services |
| Procurement method | Open |
| Procurement method details | Open procedure |
| Tender suitability | Not specified |
| Awardee scale | SME |
| All stages | Tender, Award |

## Dates

| Field | Value |
| --- | --- |
| Publication date | 1 Feb 2024 |
| Submission deadline | 13 Dec 2023 |
| Future notice date | Not specified |
| Award date | 25 Jan 2024 |
| Contract period | 26 Jan 2024 - 31 Mar 2024 |
| Recurrence | Not specified |

## Values

| Field | Value |
| --- | --- |
| Tender value | £80,000 |
| Lots value | £80,000 |
| Awards value | Not specified |
| Contracts value | £63,858 |

## Status

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

## Buyer

| Field | Value |
| --- | --- |
| Main buyer | SCOTTISH GOVERNMENT |
| Locality | GLASGOW |
| Post town | Glasgow |
| Postcode | G2 8EA |
| Country | Scotland |
| ITL 1 | TLM Scotland |
| ITL 2 | TLM3 West Central Scotland |
| ITL 3 | TLM32 Glasgow City |
| Local authority | Glasgow City |
| Electoral ward | Anderston/City/Yorkhill |
| Westminster constituency | Glasgow North |
| Delivery location | TLM Scotland |

## Supplier

| Field | Value |
| --- | --- |
| Number of suppliers | 1 |
| Supplier names | BUILDING RESEARCH ESTABLISHMENT |

## CPV Codes

### Divisions

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

### Codes

- 71314000 - Energy and related services
- 73110000 - Research services

## Release History

- 1 Feb 2024 at 00:00 - Award - PCS Notice - Website Contract Award Notice - https://www.publiccontractsscotland.gov.uk/search/show/search_view.aspx?ID=FEB497704
- 29 Nov 2023 at 00:00 - Tender - PCS Notice - Website Contract Notice - https://www.publiccontractsscotland.gov.uk/search/show/search_view.aspx?ID=NOV493805

## Documents

- https://www.publiccontractsscotland.gov.uk/search/show/search_view.aspx?ID=NOV493805
  Validation of RdSAP U-calculation methodology for traditional stone walls - The Scottish Government wishes to procure research to validate whether the RDSAP 10 calculation method provides an appropriate estimation of wall u-values for Scottish homes. The overarching aim of this research is to: - to measure in-situ U-values for different existing stone wall material types to assess confidence in the current U-value equations published in RdSAP10 to predict Scottish stone wall U-values. - consider whether revisions to the stone wall U-value calculation algorithms are required in future home energy performance methodologies for existing homes.
- https://www.publiccontractsscotland.gov.uk/search/show/search_view.aspx?ID=FEB497704
  Validation of RdSAP U-calculation methodology for traditional stone walls - The Scottish Government wishes to procure research to validate whether the RDSAP 10 calculation method provides an appropriate estimation of wall u-values for Scottish homes. The overarching aim of this research is to: - to measure in-situ U-values for different existing stone wall material types to assess confidence in the current U-value equations published in RdSAP10 to predict Scottish stone wall U-values. - consider whether revisions to the stone wall U-value calculation algorithms are required in future home energy performance methodologies for existing homes.

## Notice URLs

- http://
- http://www.scotland.gov.uk
- https://api.publiccontractsscotland.gov.uk/v1/Notice?id=ocds-r6ebe6-0000751791
- https://www.publictendersscotland.publiccontractsscotland.gov.uk/esop/pts-host/public/pts/web/login.html

## 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-r6ebe6-0000751791. The underlying structured data is available as OCDS JSON at https://d3tenders.com/contract/ocds-r6ebe6-0000751791.json.