REW12 – Retro Ecowall – Window Jamb – Plan
Price range: £9.00 through £14.00 + VAT
This plan detail shows the junction between the Retro Ecowall system and an existing window jamb, applied to a 215mm solid brick wall. The primary detail shows 20mm Gutex Thermoroom natural wood fibre insulation boards returned into the window reveal, with Pro Clima Contega Solido SL airtight sealing tape laid between the layers of diathonite plaster and Pro Clima Contega Fiden Exo expanding sealing tape at the connection to the window frame.
An alternative detail shows 25mm wood wool board returned into the reveal in lieu of the insulation boards, with Pro Clima Contega Solido SL airtight sealing tape. Two plan views are provided showing the junction at different positions across the reveal width. This detail should be read alongside REW13, which covers the window head and cill.
See drawing notes for full information.
Features of this detail: retrofit, IWI, internal wall insulation, vapour open build-up, breathable, masonry wall, solid wall, lime render, insulating plaster, wood fibre insulation, timber window, sash window, traditional window, window reveal, airtightness tape
This Detail Features
Ecological Building Systems
Ecological Building Systems support the construction sector in the creation of a better built environment through the supply of innovative, sustainable, ecological building materials and solutions and deliver quality, affordable products and training.
Many of the products featured in this detail are available from Ecological Building Systems, and Ecological are on hand to provide expert technical advice when specifying and designing high performance buildings in terms of airtightness, windtightness and high levels of insulation.
Featured Products
Gutex, based in Germany, is a fourth generation family run company and leading manufacturer of woodfibre insulation boards. Gutex was the first in Europe to manufacture insulation boards from ecological wood fibre, incredibly this was in 1932. Testament to Gutex's continuous innovation philosophy, they became the first manufacture to produce single-ply homogeneous wood fibreboard insulation using a low-energy dry process which allowed the production of thicker higher quality boards, providing superior thermal storage capacity.
Diathonite Thermactive is a breathable lime and cork-based insulating plaster designed for internal solid masonry walls and ceilings. It improves thermal performance while allowing moisture to move naturally through the wall, helping to reduce condensation and maintain a healthier indoor environment, making it particularly well suited to older, solid-wall and retrofit properties.
Lime Green Solo is a breathable, one-coat lime finishing plaster for internal walls and ceilings, designed to provide a smooth, durable finish over masonry, lime plasters and wood fibre insulation boards. Made from natural lime-based materials and free from cement, it helps regulate moisture, reduces the risk of condensation and mould, and is particularly well suited to the renovation and retrofit of older, solid-wall buildings where breathability is essential.
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