REW03 – Retro Ecowall – Sloping Ceiling Cold Roof Eaves With Impermeable Underlay – Section
Price range: £9.00 through £14.00 + VAT
This section detail shows the junction between the Retro Ecowall system and a cold pitched roof at eaves level where the ceiling follows the roof slope and a bitumen HR felt impermeable underlay is used in place of a breather membrane, applied to a 215mm solid brick wall.
Because the underlay is impermeable, ventilation between the rafters must be maintained and unobstructed ventilation into the loft space is required. A 25mm wood wool board is installed below the rafters with notches for the ceiling joists and sealed to joists and purlins with Pro Clima Aerosana Visconn Fibre. Gutex Thermoroom is fixed through the wood wool board to the rafters with thermally broken fixings. Natural fibre loft insulation is installed from above, fully filled between ceiling joists and laid over ceiling joists. Pro Clima Intello Plus vapour control membrane, Pro Clima Solitex Plus breather membrane, and Pro Clima Orcon F airtight sealant are shown sealing the membrane to the wood wool board. The existing ceiling is cut back to allow continuation of insulation below the rafters.
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, cork insulation, insulating plaster, wood fibre insulation, slate roof, timber roof, existing roof, cold roof, insulation at ceiling level, vented roof, clipped eaves, eaves
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.
Other Details
You can find the associated details from this set below. And don’t forget, if you are a member you can also search for details in our full library spreadsheet. Just go to your account page and click on the link to the spreadsheet.
Disclaimer
The details must be regarded as a starting point for developing your own detail relevant to your specific project and needs.
We assume no legal liability or responsibility for loss or damage resulting from the use of information contained on our website.
We reserve the right to update or change information on the site at any time without prior notice.
Architectural drawings should be prepared by a qualified and experienced person, who holds the appropriate insurances. We offer no assurance or guarantee of Building Regulations approval or compliance through the use of these drawings. All drawings should be checked and approved by the appropriate approved inspectors.
Detail drawings (in all formats) sold on our website are copyrighted. They are for personal and commercial use in construction projects. They may not be published on any website, resold, repurposed or distributed beyond the uses outlined here.
The details are not to be used by manufacturers to demonstrate the use of their own products, or for use in other literature, marketing documents and other associated materials.
