SASH WINDOW DRAUGHT-PROOFING & ENERGY UPGRADES – HELENSBURGH
Stop heating the street. Keep the heritage, lose the draughts.
WHY YOUR PERIOD WINDOWS LEAK HEAT
Original Victorian and Georgian sashes were never designed for central heating. Over time, gaps form around frames, pulleys and meeting rails, causing:
- cold draughts at ankle height
- whistling and rattling on windy nights
- 25 %–30 % of total heat loss in many sandstone tenements (Energy Saving Trust)
Invisible brush seals and slim-line double glazing remove these problems without altering your home’s appearance or breaching conservation rules.
WHAT WE INSTALL
- Perimeter brush-pile seals – invisible once painted.
- Vacuum slim double glazing – U-value around 1.0 W/m²K.
- Low-e secondary glazing – removable for listed interiors.
- Parting-bead insulation – stops vertical air wash.
OUR FOUR-STEP UPGRADE PROCESS
- Free survey and fixed-price quote.
- Precision routing in our Lenzie workshop.
- On-site fit and balance; sashes re-corded and glide-tested.
- Final blower-door check, tidy-up and written guarantee.
Survey slots fill quickly—reserve yours now on 0141 363 0123.
PROVEN SAVINGS IN LOCAL HOMES
Typical post-installation results on Glasgow tenements (2024-25):
- Air-change rate down from 1.8 ACH to 1.2 ACH.
- Room temperature up by 2 °C at the same thermostat setting.
- Gas use cut 18 %–32 % in Helensburgh sandstone villas.
*Figures vary with property size, boiler efficiency and user behaviour.
Customer comment:
“After the brush seals went in, our living room stopped whistling and the boiler cycle dropped by a third.” – Mrs M. Rodgers, Partick
COMPLIANCE & CONSERVATION
- Upgrades preserve original sight-lines—accepted by Glasgow City Council in multiple conservation areas.
- Meets or exceeds Scottish Building Standards Part L U-value targets.
- Specification sheets supplied for EPC assessors.
CREDENTIALS & GUARANTEES
- 25 + years’ combined sash-window experience
- CSCS- and PASMA-accredited installers
- £5 million public-liability cover
- 5-year workmanship guarantee on seals and secondary glazing
- 10-year guarantee on new slim-double units
- FSC-certified Scandinavian redwood or Accoya® timber
Sleep warm this winter—call the workshop on 0141 363 0123.
CASE STUDY – THIRD-FLOOR WEST END TENEMENT
Before: single glazing (5.4 W/m²K), visible gaps, 63 dB internal traffic noise, boiler running 9 h/day in January.
After: vacuum units (1.4 W/m²K), hidden seals, 56 dB noise, boiler running 6 h/day.
Estimated payback: 3.5 years at 2025 gas prices.
View more before-and-after images on request.
FAQ – DRAUGHT-PROOFING
- Seals visible?
No; routed flush. - Conservation-area permission?
Usually not required; we liaise if needed. - Install time?
One day for up to three windows. - Costs?
Seals from £160 + VAT; seals + vacuum units from £490 + VAT. - EPC impact?
Lower U-value recognised by assessors.