While retrofitting provides marginal glass upgrade, full uPVC replacement delivers exponentially superior R-Value, structural wind security, and long-term value.
We offer a clear cost-benefit analysis to resolve chronic cold and poor insulation permanently.
Limitations of Retrofit Upgrade
Persistent Thermal Bridges Remain
Retrofitting only the glass leaves the old frame, which remains a massive heat conductor. This persistent thermal bridge severely limits the final R-Value and continues to be a site for condensation.
Unaddressed Air Leakage and Security
Crucially, retrofit does not upgrade aging seals or worn locking hardware. This allows continued wind-driven air leakage and structural flex, undermining the thermal performance and safety of the window unit.
Maximising Value with Full uPVC Replacement
Achieving True High R-Value Performance
Our full replacement method installs a brand new, airtight system. This is the only way to completely eliminate thermal bridging and achieve the H1-compliant R-Values necessary to combat chronic Wellington cold.
Security, Durability, and Maintenance
You gain modern multi-point security, durable seals built for high-wind environments, and frames guaranteed never to require maintenance, offering a total long-term solution.
Cost Comparison and Investment
Analysing Lifetime Cost vs. Investment
The lower initial cost of retrofit is offset by its poor long-term thermal performance. Full uPVC replacement provides far superior lifetime savings on heating and a greater return on property investment.
Comprehensive Warranty
Our single, comprehensive warranty covers the entire new uPVC system and all professional installation work, unlike retrofit options which may void the original frame warranty.
