Honest Comparison
Comparing Presswarm and Clearview for secondary glazing installations in London — pricing, lead times, conservation expertise.
| Feature | Presswarm | Clearview Secondary Glazing |
|---|---|---|
| Founded | 1973 | 1992 |
| Price (sash secondary glazing) | From £650/window | From £750/window |
| Lead time | 3-4 weeks | 6-8 weeks |
| Conservation areas | Yes | Yes |
| Listed building consent advice | Yes | Yes |
| Hertfordshire coverage | Local installer | London focus |
| Family-run | Yes | No |
No commission-driven sales. Our surveyors are paid salary, not commission. You won't be pressured into a same-day decision or a fictional "today only" discount.
Direct-from-fabricator pricing. We don't have national TV advertising budgets to recover from your quote. The Presswarm name has been associated with fair, transparent pricing since 1973.
Local installers, employed not subcontracted. The team who measures your home installs your windows. No handoffs, no excuses.
Family-run continuity. 50+ years of unbroken trading through every market cycle. Your guarantee is meaningful.
Free, no-obligation, and no pushy sales. See the difference a family-run installer makes.