London · Q2 2026 · Schüco Trained
Schüco AWS 70.HI Installer London
The Schüco AWS 70.HI spec
AWS 70.HI is Schüco's high-insulation aluminium window. The .HI suffix is the giveaway — it's the variant tuned for Passivhaus-class thermal performance without sacrificing the slim 77mm sightline of the AWS 70 family. Below is the spec sheet our fabricators work from.
| Frame depth | 70 mm |
| Sightline (face width) | 77 mm casement / 102 mm tilt-turn |
| Whole-window Uw (DG) | 1.2–1.3 W/m²K |
| Whole-window Uw (TG) | 0.84 W/m²K |
| Frame-only Uf | 1.4 W/m²K |
| Glass Ug (TG, krypton) | 0.5 W/m²K |
| Acoustic rating | up to 47 dB Rw |
| Air permeability | Class 4 (EN 12207) |
| Watertightness | Class 9A (EN 12208) |
| Wind resistance | Class C5/B5 (EN 12210) |
| Security | PAS 24 standard, RC2 optional |
| Glass thickness range | 24–52 mm |
| Max sash size (casement) | 1600 × 2400 mm |
| Passivhaus certification | Component certified (cool-temperate) |
AWS 70.HI configurations
The full opening-style range. Mix-and-match within a single mullion-and-transom assembly — typical façade specs run fixed picture units below tilt-turn vents above, with corner posts handling 90° geometry.
| Configuration | Use case | Notes |
|---|---|---|
| Fixed / picture | Large unobstructed apertures, stairwells, gable ends | Lowest cost per m². No vent — pair with adjacent opener. |
| Side-hung casement | Standard rear/side elevation windows | Most common; full opening for cleaning and egress. |
| Top-hung | Above-counter, weather-exposed elevations | Limited opening, sheds rain easily, secure-when-vented. |
| Tilt-turn | Apartments, upper-floor, secure ventilation | Tilt for trickle vent, turn for full opening / cleaning. |
| Reverse-opening | Outward inaccessible, balconies, tower blocks | Cleaning from inside without external access. |
| Corner post (structural) | Frameless 90° corners | Requires structural opening sign-off; striking visual. |
| AWS 70 ASS sliding integration | Matched façade with sliding doors | Identical sightline lines through windows and door — clean architectural read. |
Why Apex for AWS 70.HI in London
AWS 70.HI is more demanding to install correctly than a standard alu window. Thermal-break continuity through the install detail, airtightness tape on the perimeter, and squareness on tilt-turn hardware all matter. We've installed AWS 70.HI on a Passivhaus-targeting retrofit in north London, and on multiple residential and small-commercial London projects.
| What we bring | Why it matters |
|---|---|
| Schüco UK fabricator network | Direct procurement, accurate lead times, factory hardware sets — no parts mismatch on site. |
| Airtightness tape detailing | External Tescon / internal Contega-style tape applied per Passivhaus install detail. Critical for blower-door pass. |
| Thermal-bridge install detail | Frame seated on insulated sub-frame where required, not bridging to lintel steel. Coordinated with architect detail. |
| Tilt-turn hardware calibration | Schüco's tilt-turn hardware needs precise sash adjustment; we set it on day-of-install and snag at handover. |
| FENSA self-certification | Reg 40373. Building Regs sign-off in your name within 28 days. |
| Schüco-backed 20-year colour | Powder-coat warranty against fade, chalking and adhesion failure. |
Schüco AWS 70.HI fitted prices
London Q2 2026, fitted, including VAT, frame, double glazing, fitting, removal of existing window, and FENSA self-certification. Triple glazing adds 15–20%. RC2 security upgrade adds £180–£280 per opening.
| Configuration | Typical size | Low | High |
|---|---|---|---|
| Fixed / picture (small) | 1.0 × 1.2 m | £1,200 | £1,700 |
| Casement (single sash) | 0.6 × 1.2 m | £1,400 | £1,900 |
| Casement (twin sash) | 1.4 × 1.4 m | £1,900 | £2,400 |
| Tilt-turn | 0.9 × 1.4 m | £1,800 | £2,500 |
| Large picture / fixed | 2.4 × 2.4 m | £2,500 | £4,200 |
| Corner post unit (90°) | 2 × 1.5m + 2 × 1.5m | £4,200 | £6,000+ |
| Triple-glazing upgrade | per window | +15% | +20% |
| RC2 security upgrade | per window | +£180 | +£280 |
Frequently asked
What is Schüco AWS 70.HI?
Schüco AWS 70.HI is a German-engineered high-insulation aluminium window system with a 70mm frame depth and 77mm sightline. The .HI (High Insulation) variant uses an enhanced polyamide thermal break and foam insert to reach a 0.84 W/m²K whole-window U-value with triple glazing — borderline Passivhaus territory and a strong fit for retrofit and new-build projects targeting EnerPHit or Building Regs Part L 2025.
What's the U-value of Schüco AWS 70.HI?
Schüco AWS 70.HI achieves 0.84 W/m²K whole-window Uw with triple glazing (Ug 0.5, krypton-filled, warm-edge spacers) on a typical 1230 × 1480mm reference window. Double-glazed it sits at 1.2–1.3 W/m²K. The Uf (frame-only) value is 1.4 W/m²K — best-in-class for a 70mm aluminium system.
How much does Schüco AWS 70.HI cost fitted in London?
Fitted Schüco AWS 70.HI in London costs £1,400–£2,400 per casement window, depending on size, configuration and glass spec. Large picture or corner units run £2,500–£6,000+. Triple glazing adds 15–20%. Prices include VAT, frame, glazing, fitting, removal of the old window, and FENSA self-certification.
Is AWS 70.HI Passivhaus certified?
AWS 70.HI is Passivhaus Component Certified by the Passivhaus Institute as a 'Cool, Temperate Climate' window when paired with appropriate triple glazing — it sits at the threshold (≤0.85 Uw with the certified install detail). For full Passivhaus new-builds in cooler UK climates, Schüco AWS 75.SI+ at 0.76 Uw is the safer specification. AWS 70.HI is widely used on EnerPHit retrofits where the standard is more lenient.
What configurations does AWS 70.HI come in?
AWS 70.HI is available as fixed/picture, side-hung casement, top-hung, tilt-turn, tilt-only, and reverse-opening. Frames can be combined into mullion-and-transom assemblies and corner posts. Coupling profiles allow integration with the Schüco AWS 70 ASS sliding door for matched-system façades.
Does AWS 70.HI meet RC2 security?
Yes — AWS 70.HI can be specified to RC2 (Resistance Class 2 per EN 1627) with the appropriate locking, hinge and laminated glass package. RC2 is the police-preferred Secured by Design level for ground-floor and accessible openings. PAS 24:2022 is standard across the range.
Is Apex Glazing a Schüco trained installer?
Apex Glazing fitters are Schüco-trained through the Schüco UK fabricator network. We have completed AWS 70.HI installations across London including a Passivhaus-targeting retrofit in north London where airtightness and thermal-break continuity were critical. We coordinate closely with the project's airtightness consultant on tape detailing where required.
What's the colour and finish guarantee on AWS 70.HI?
Schüco AWS 70.HI is finished in powder coat to any RAL or anodised. Standard powder-coat finishes carry a 20-year colourfast guarantee against fade and chalking, backed by Schüco. Dual-colour (different inside vs outside) is available with a small premium and 4–5 week additional lead time.
