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Quality Assurance

Quality Assurance

Project Info

Applying external wall insulation appears like it should be a relatively easy process to install and monitor for quality. After all you can see if the insulation is present and continuous as its on the outside of the building. Our client had installed EWI to over 300 properties and was confident the contractor had done a good job, some properties had however complained just 3 months after install of some cold regions and wall paper pealing away from the walls.  

 

How IRT Surveys helped: 

SERVICES USED :

  • Thermal Imaging
  • SAP2012 Calculations
  • TheHouseSurvey.co.uk

OUTCOME :

IRT assessed all 300 properties in one evening and identified 89 failures in the insulation detailing which was allowing moisture to bypass the system and track along the support system behind. This in turn was building up until it was penetrating the property leading to internal ingress issues. IRTs report was able to show the exact location of the defects within the properties allowing for a focused repair operation to be carried out. The remaining properties all showed a well insulated EWI system. A repeat survey was carried out 11 months after install and before the end of the retention period. This found that all issues had been addressed and no further issues were present.

Stock Surveys

Stock Surveys

Project Info

Our client, a large local authority, had undertaken a refurbishment program of works across several decades. Several of the properties were now showing issues with high energy builds and in some cases internal mould growth. On paper the properties should have been performing far better as they had been cavity filled in the late 2000's and had been double glazed in 2010 with boiler improvements in 2014.  A fast low cost inspection program was required to determine the cause of the issues.

 

How IRT Surveys helped: 

SERVICES USED :

  • Thermal Imaging
  • SAP2012 Calculations
  • TheHouseSurvey.co.uk

OUTCOME :

On receipt of the clients stock list, IRT created an efficient survey plan allowing us to survey regions quickly and with minimum disruption. The front of every property was thermally imaged by our surveying team and the exact gps location and time/date logged automatically. Total survey time was 32 evenings/nights.

This data was then processed using our bespoke Envision software to determine regions of the property indicative of possible insulation defects. Envision builds 2 theoretical models of the property, one as if it were perfect and another with the identified defects in place. Energy use and CO2 output are determined for both models resulting in each anomaly being quantified for its impact on the building allowing every property to be ranked and rated.

Envision produces an As Built SAP and EPC rating along with an actual comparison, in addition to this Envision also runs a range of "what if" scenarios, such as Roof improvements, improved double glazing, boiler changes, and reports on the impact of each in terms of £s, kWh and CO2 saved per year.

This data was presented in an easy to use Excel spreadsheet with the thermal images embedded. The house survey.co.uk, our online property database was also provided as part f the package. This allows users to easily log on, search for properties, updated information, re-run calculations, map data and produce reports. (www.thehousesurvey.co.uk) 

Poor insulation in a home
Commercial Surveys

Commercial Surveys

Project Info

Surveying large shopping centres quickly and cost effectively can be a challenge. Most open early in the morning and close late 7 days a week meaning access to certain areas can be problematic. Our client, a large property owner, was looking to acquire a new property and needed to check the integrity of the current construction prior to an offer being made. The site consisted of 8 interconnected units, each over 10,000m2 each. The survey was to assess the elevations, roofing, glazing details, determine any regions of weakness in the waterproofing of the entire site and calculate potential savings from refurbishment options. All with tenants in place and open to the public. 

 

How IRT Surveys helped: 

Services used :

  • Thermal Imaging
  • Electronic Leak Detection
  • Commercial Envision

Outcome

Each of the properties was surveyed on foot within a 16 hour period with Visual images being taken during the daytime and thermal imaging at night. From the supplied building plans an energy model of the property was created and the newly acquired thermal data incorporated into it, giving a real life view of the properties performance. From this information, IRT provided a comprehensive report detailing the exact regions of trapped moisture on the roof and its financial impact on the property. Regions of poor detailing at cladding junctions were also identified along with 8 regions of water ingress which were currently invisible to the human eye. Based on the survey results, our client was able to justifiably reduce their offer on the property by £1.2 million. 

Render Surveys

Render Surveys

Project Info

Rendered properties can often prove problematic when they begin to fail. Typical failures result in large sections of concrete falling from potentially 10's of metres up. Our client had a large residential and commercial property portfolio which were all built and rendered in the late 1950s and 60s. Many of these properties were multi-storey and multi-tenure. Traditionally, our client would wait for a render failure, notify tenants, scaffold an entire block then hammer test each elevation until they found defective areas. This process was proving far too costly and time consuming and was not a scalable solution.

 

How IRT Surveys helped: 

Services used :

  • Thermal Imaging
  • The House Survey

Outcome

IRT surveyed all of the properties over 4 evenings and identified all regions of delamination/boss render for each property. From ground level, we could detect a defect as  small as 12 cm2 3 storeys up. No need to alert the tenants or cause disruption with scaffolding. Each property was uploaded to our site thehousesurvey.co.uk where the results could be viewed securely and onsite by contractors. This data set resulted in the realisation that only 4% of the properties revealed significant issues requiring further action. The remaining properties can be assessed on a yearly basis with any delamination being detected early.  

Underfloor Heating

Underfloor Heating

Project Info

Our client had won a contract to refurbish an office block, part of the brief included installation of new internal partition walls. Unfortunately, the entire property had underfloor heating pipes buried within the floor screed. No plans or records remained to show where the pipes lay. This caused huge problems for the contractor as he was unable to drill into the floor in case he hit a pipe.

 

How IRT Surveys helped: 

Services used :

  • Thermal Imaging

Outcome

Utilising our thermal imaging technology, IRT were able to pinpoint the exact locations of the pipework, highlight them directly on the floor and mark them on a scale plan. As part of the survey we also detected a region of damaged pipework which was leaking and also sections of the pipework had been poorly laid resulting in inconsistent heating.

Predictive Maintenance

Predictive Maintenance

Project Info

Electrical inspections can often be slow and only carried out during downtime or when a failure occurs. Many insurance companies now insist on an annual thermal inspection for compliance. Our client required a cost effective solution whereby we provided a suitable report and information to allow their electricians and engineers to carry out repairs.

 

How IRT Surveys helped: 

Services used :

  • Thermal Imaging

Outcome

IRT carried out an inspection and survey in 1 day whilst the clients factory was fully operational. We require an qualified member of staff to accompany us at all times to open and close distribution panels safely. Our reports highlight all regions of possible issue and categorise them on a scale of 1,2 or 3 dependent on seriousness. IRT are fully independent and we do not make money from carrying out repairs, rewinds or from maintenance contracts. We simply provide the information for you to act on.