Technical evidence in a window and door dispute that concluded with a £20,000+ refund.
A homeowner raised concerns about a multi-product installation by a national window company. DMR's lead consultant inspected the products and prepared written technical evidence documenting the visible defects.
The reported problem
Several products did not fit the openings as intended.
The inspection found multiple windows and doors manufactured approximately 40mm to 80mm below the required opening heights. Filler pieces had been installed above the products to occupy the resulting gaps.
Additional concerns included incomplete finishing, missing components, incorrect colours, a design that differed from the agreed configuration and visible installation damage.
Technical work
Turning a broad complaint into specific findings
Physical inspection
The installed products and accessible surrounding finishes were examined in person.
Measurements
Installed product heights were compared with the relevant opening dimensions.
Defect schedule
Each significant concern was recorded separately so it could be understood and answered.
Written evidence
A concise technical document set out the observations and the reasons they were considered material.
Outcome
The matter later concluded with a refund exceeding £20,000.
The technical evidence formed part of the material available in the complaint. The final outcome depended on the specific contract, correspondence and circumstances of that matter.
This case does not guarantee the result of another complaint.
Every instruction must be assessed on its own documents, physical evidence, contractual position and response from the other party.
Next step
Start with an independent review of your evidence.
Send the key documents and a concise summary. DMR will confirm whether the matter appears suitable for review or inspection.