Windows Doors Patio Doors Regulations Contact Call 01794 721 100
Windows/MasterLine 8
Open — Inwards

MasterLine 8

Ultimate performance window system with exceptional thermal insulation — our best-in-range Uw value, fabricated and installed in-house.

Get a free quote Call 01794 721 100
MasterLine 8 aluminium window profile detail
Specification

MasterLine 8 at a glance

0.88
W/M²K · BEST-IN-RANGE Uw
77–98mm
FRAME DEPTH
RC2/RC3
SECURITY RATING
Inward
OPENING TYPE
Key features

Our flagship thermal performance

01

Outstanding thermal performance

Achieving U-values as low as 0.88 W/m²K, the lowest in our window range — advanced thermal break technology delivers superior insulation without compromising the functional design aesthetic.

02

Exceptional acoustic insulation

Sound reduction up to 46dB effectively blocks external noise — ideal for urban locations and properties near busy roads requiring enhanced acoustic protection.

03

Large vent capabilities

Supports vents up to 1700mm wide and 2800mm high with a maximum vent weight of 200kg, enabling impressive floor-to-ceiling windows and expansive openings.

04

Enhanced security & safety

RC2, RC3 and PAS24 certified burglar resistance with impact resistance I5-E5. Fire resistance up to EI₂ 30 provides comprehensive safety, with concealed hinges and drainage options.

Technical details

Precision engineering

Every specification refined to deliver optimal performance, versatility and production efficiency.

200kg
MAX VENT WEIGHT
1700×2800
MAX VENT SIZE (MM)
Class 4
AIR TIGHTNESS · 600PA
E900
WATER TIGHTNESS · 900PA
Class C4
WIND LOAD · 1600PA
46dB
ACOUSTIC PERFORMANCE
Certified performance

MasterLine 8 — technical performance data

Independently tested and certified to exceed UK Building Regulations and industry standards.

Performance metricRating / valueStandard
Thermal insulation (Uf)1.0 W/m²KFrame U-value
Thermal insulation (Uw)0.88 W/m²KWindow U-value
Air tightnessClass 4 (600Pa)BS EN 12207
Water tightnessClass E900 (900Pa)BS EN 12208
Wind load resistanceClass C4 (1600Pa)BS EN 12210
Acoustic performanceTUTI: 46(0;-3) dB · DC: 44(-2;-4) dBBS EN ISO 717-1
Max vent dimensions1700mm × 2800mmWidth × height
Burglar resistanceRC2, RC3, PAS 24Enhanced security
Impact resistanceI5 – E5BS EN ISO 7892
Fire resistanceEI 30 – EI₁ 30 – EI₂ 30 – EW 30BS EN 1634
Opening & closingClass 3BS EN 13115
Explore more

Other window systems

Open — Outwards

SlimLine 68

Slender steel-look design, perfect for contemporary projects. Ultra-slim 68mm profiles.

  • Uw 1.1 W/m²K
  • 68mm depth
  • PAS24 security
View details →
Open — Inwards

SlimLine 38

Ultimate performance window system with exceptional thermal insulation.

  • Uw 0.96 W/m²K
  • 99mm depth
  • RC2/RC3 security
View details →

Ready to explore MasterLine 8 for your home?

Speak to our team for a free, no-obligation quote — Romsey, Southampton, Winchester & across Hampshire.

Call 01794 721 100