New Details

Flat and Pitched Roof Details

Flat and Pitched Roof Details

Following some recent member requests, we are expanding our collection of pitched roof and eaves junctions with a particular focus on warm roofs and ceiling-level insulation. This new set of details supports a range of common and advanced construction scenarios, from...

New Details for October 2025: Masonry Extension Full Fill Wall Types

New Details for October 2025: Masonry Extension Full Fill Wall Types

This month we’re expanding our collection of masonry wall extension details with a comprehensive new set that explores full fill cavity wall construction in combination with a range of floor types and finishes. The series includes 14 new details (DL471–DL484), each...

September 2025 – Timber Frame Extension Details

September 2025 – Timber Frame Extension Details

This month we’ve added a new series of details focused on timber frame house extensions, offering practical solutions for a variety of boundary, floor, and wall junction conditions. These details have been developed to address common scenarios faced when designing...

August 2025 – New Details

August 2025 – New Details

This month at Detail Library, we’re expanding our CLT collection! CLT is growing in popularity, and we can see why. Just google CLT house and you’ll be presented with beautiful examples of this solid sustainable material. Due to the popularity of our existing CLT...

July 2025 – New Details

July 2025 – New Details

This month, we’re pleased to share Part 2 of our comprehensive set of construction details showcasing Porotherm clay block systems. Porotherm is a precision-engineered clay block walling system that delivers fast construction, high thermal performance, and robust...

June 2025 – New Details

June 2025 – New Details

We’re excited to announce a fresh set of technical details focused on skylights and flat roof assemblies in house extensions — designed to help you integrate daylight, performance, and aesthetic flexibility into your projects. This month’s upload features a suite of...

May 2025 – New Details

May 2025 – New Details

This month, we’re pleased to share a comprehensive new set of construction details showcasing best-practice design and build-ups for Porotherm clay block systems. Porotherm is a precision-engineered clay block walling system that delivers fast construction, high...

April 2025 – New Details

April 2025 – New Details

We are delighted to share another set of house extension details featuring the amazing glazing systems from Fluid Glass. Fluid Glass provide a wide variety of structural glazing systems, windows and doors.  These details focus on quite a challenging part of a new...

March 2025 – New Details

March 2025 – New Details

This month we are excited to share another set of details that have been requested regularly by our members, which uses SureCav wall spacers system. This set consists of SureCav stone facing partial fill masonry cavity wall details and SureCav stone facing timber...

February 2025 – New Details

February 2025 – New Details

Waterproofing is one of the most critical aspects of bathroom design, yet it’s often overlooked until problems arise. A poorly waterproofed bathroom can lead to leaks, mould growth, and expensive structural damage – all of which can be avoided with the right...

January 2025 – New Details

January 2025 – New Details

This month, we’re excited to introduce a brand-new set of drainage and external works details to The Detail Library. These technical drawings cover critical areas such as inspection chambers, drainage channels, and the often-overlooked build-over details. Drainage is...

December 2024 – New Details

December 2024 – New Details

This latest set of details has been developed in collaboration with People Powered Retrofit. People Powered Retrofit are a cooperative one-stop-shop based in Manchester, working across the north west to provide independent advice to householders to plan, procure, and...