Built around custom milled timber frames, aluminum rainscreen cladding, and multiple air seals, EPOC wood-clad systems deliver warmth, durability, and exceptional thermal performance across three product tiers: [Clad+]68, [Clad+]88, and [Clad+]PH. Frame depths of 68mm, 88mm, and 104mm cover everything from high-end residential to certified Passive House construction, with argon-filled glazing pressure-adjusted for high-altitude environments. The full lineup spans tilt-turn windows and fixed glazing to lift-slide and bi-fold accordion systems, each fabricated to exact dimensions with no standard sizes.
![[Clad+]88 — 88mm High-Performance Wood-Clad Window](https://epoc.glass/wp-content/uploads/2023/03/Gemini.png "WoodClad+")
Wood-Clad System Tiers
![[Clad+]68 — 68mm Triple Pane Wood-Clad Window](https://epoc.glass/wp-content/uploads/2026/01/Clad68.png "Clad+68")
![[Clad+]88 — 88mm High-Performance Wood-Clad Window](https://epoc.glass/wp-content/uploads/2024/11/Clad88-2.png "Clad+88")
![[Clad+]PH — Passive House Wood-Clad Window System](https://epoc.glass/wp-content/uploads/2024/11/Clad92-1.png "Clad92")
[Clad+]68
Triple pane [Clad+]68 features a 68mm frame depth, three air seals, and R-9 glass. Lower swing weight makes it an ideal specification for projects where ease of operation and broad climate performance are both priorities.
[Clad+]88
Triple pane [Clad+]88 features an 88mm frame, multiple exterior cladding profiles, and R-11 glass. The deeper frame and additional thermal mass make this the go-to specification for high-end residential projects.
[Clad+]PH
The [Clad+]PH features quad air seals, an insulation layer, and R-11 glass in a 104mm frame, purpose-built for certified Passive House construction. The highest performing wood-clad system in the lineup.
Wood Species and Colours
Interior timber is available in European Pine, White Oak, Meranti, Siberian Larch, and Teak, with over 300 paint and stain variations to match any architectural palette. Exterior aluminum cladding is available in all 300 RAL colours, with textured and anodized finish options across all systems.
Wood-Clad Window Performance Data
[Clad] available from Uw from 0.24 Btu/h·ft²·°F
[Clad+] available from Uw from 0.15 Btu/h·ft²·°F
[Clad+]PH available from Uw from 0.11 Btu/h·ft²·°F
Swisspacer Advance warm edge and Ultimate available. A black spacer bar is standard as this detracts the eye the least. White and silver spacer bars are also available as standard.
The standard Solar Heat Gain Coefficient is ~0.52 and can vary between 0.30 and 0.62 depending on exposure.
A primary benefit to European glass is the low Iron content and great visual clarity. The heavy gauge glass does not show similar waviness similar to American glass, but also avoids green tinting with low iron content.
Standard and tempered glass are most common with impact rated glass also available. Impact glass is great by both reducing 99% UV transmittance and has varying levels of burglar resistance. Obscure and ornamental glass is a great solution for privacy and decoration.
Air permeability ratings are class 3 EN 12207 for Wood Clad and class 4 EN 12207 in the [Clad+] and [Clad+]PH lines. Windload resistance ratings are Class 4 EN 122210. Multiple air seals provide some of the highest performing windows on the market!