RESOURCE HUB

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LABC Warranty Technical Manual

Version 10 of the LABC Warranty Technical Manual is applicable to applicable sites registered from 11th June 2021

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Technical Manual Section 1: Tolerances

Section 1 of our technical manual summarises the LABC Warranty technical guidance on acceptable tolerances in brickwork.

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Technical Manual Section 2: Basements

Section 2 of our technical manual considers construction below ground floor level: basements. Find details on waterproofing systems and drainage.

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Technical Manual Section 3: Foundations

In Section 3 of our technical manual we provide technical guidance on different types of foundations and consider sites with trees and clay.

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Technical Manual Section 4: Ground Floors

Ground floor structures such as suspended beam and block and concrete floors are covered in Section 4 of the LABC Warranty technical manual.

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Technical Manual Section 5: Drainage

Download Section 5 of the LABC Warranty technical manual for technical guidance on foul drainage and storm drainage.

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Technical Manual Section 6: External Walls

Download and view Section 6 of the LABC Warranty technical manual for technical guidance on external wall construction.

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Technical Manual Section 7: Internal Walls

Internal walls made of masonry, timber and metal stud are covered in detail in Section 7 of the LABC Warranty technical manual.

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Technical Manual Section 8: Windows and doors

Download Section 8 of the LABC Warranty technical manual for warranty requirements and technical guidance on windows and doors.

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Technical Manual Section 9: Stairs

In section 9 of the LABC Warranty technical manual you will find our warranty requirements and technical guidance for timber stairs.

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Technical Manual Section 10: Upper Floors

Download and view Section 10 of the LABC Warranty technical manual for technical guidance on upper floor construction elements.

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Technical Manual Section 11: Roofs

Section 11 of our technical manual covers pitched, flat and green roofs, concrete, slate and plain titles, and metal deck roofing.

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Technical Manual Section 12: Balconies and Terraces

Balconies and terraces are the building parts covered in Section 12 of the LABC Warranty technical manual, available to download here.

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Technical Manual Section 13: Chimneys and Flues

Section 13 of our technical manual provides technical guidance on masonry chimneys and gas flues.

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Technical Manual Section 14: Driveways and Paving

Download and view Section 14 of the LABC Warranty technical manual for technical guidance on the construction of driveways and paving.

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Technical Manual Section 15: Heating Services

Heating services including gas boilers are covered in Section 15 of the LABC Warranty technical manual, available to download here.

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Technical Manual Section 16: Ventilation

Section 16 of our technical manual covers ventilation including extract fans, passive stack, continuous mechanical extract and continuous mechanical s…

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Technical Manual Section 17: Electrical Services

Download and view Section 17 of the LABC Warranty technical manual for technical guidance on mains electrical services.

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Technical Manual Section 18: Water Services

Water services, cold water supply to plumbing, boilers and appliances is covered by Section 18 of the LABC Warranty technical manual.

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Technical Manual Section 19: Outbuildings

In section 19 of the LABC Warranty technical manual you will find our warranty requirements and technical guidance for outbuildings.

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Technical Manual Section 20: Ground Conditions

Download Section 20 of the LABC Warranty technical manual for technical guidance on assessing and working with ground conditions.

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Technical Manual Appendix A: Finishes

In Appendix A of the LABC Warranty technical manual we provide technical guidance on finishes, including plasterboard and ceramic tiling.

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Technical Manual Appendix B: Coastal Locations

In Appendix B of the LABC Warranty technical manual we consider warranty requirements for building in coastal locations.

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Technical Manual Appendix C: Materials and MMC

In Appendix C of the technical manual we cover materials handling and storage and considers modern methods of construction approaches.

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Technical Manual Appendix D: Conversions and Refurbishments

In Appendix D of our technical manual we provide guidance on how to meet our warranty requirements when converting or refurbishing existing buildings

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New home built alongside or attached to an existing home

This technical article is intended to clarify what LABC Warranty's requirements are for newly built "attached" dwellings.

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Tech Update: Render on Substrates

This Resource Hub article provides additional guidance on the use of rendering on different substrates.

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Tech Update: Insulated reveals to refurbished buildings

This technical update provides additional guidance on insulated reveals to refurbished buildings.

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Wall tie replacement in existing buildings

This technical update provides additional guidance on wall tie replacement in existing buildings.

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Acceptability of timber frame kits for use on our sites

From September 1st 2021 LABC Warranty will only accept projects that have timber frame panels by an accredited manufacturer.

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Cavity trays and reveal closers

This technical update provides additional guidance on the use of cavity trays and reveal closers.

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Our Guide to Structural Lintels and Bearings

In this practical guide we have outlined technical pointers to ensure your build doesn’t suffer from defects caused by failing lintels and bearings.

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8 Handy Hints for Installing Horizontal DPC

Check out our 8 handy tips to help you get horizontal damp proof course right, first time.

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Single glazed windows in conversion schemes

This technical update provides guidance on risk managing single glazed windows in conversions schemes.

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Refurbishments & Alterations to Existing Structures Guide

Download our Refurbishments Guide for guidance on how to stay warranty compliant when completing refurbs or alterations to existing structures.

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TRADA Span Tables

This technical update provides additional guidance on the TRADA span tables.

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Natural stone outer leaf in cavity construction

This technical article provides additional guidance on the use of natural stone outer leaf in cavity construction.

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Foundation Depth Calculator

Check out our Foundation Depth Calculator to easily determine the exact foundation depth required when building near trees.

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Our Comprehensive Structural Guide to Building on Filled Ground

Download our Guide to Building on Filled Ground where we outline good practice in relation to building on fill which is acceptable to LABC Warranty.

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Our Good Practice Structural Guide When Building Near Mining

Download our Mining Guide for guidance on the requirements when building over, or in the vicinity of mine-workings, entries and features.

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Our Good Practice Guide to Piling

Find out about the structural design and installation of piled foundations with our Good Practice Guide to Piling.

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Our Guide to Raft Foundations

Learn about what LABC Warranty recognise as good practice in relation to the design and construction of Raft Foundations

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Our Guidance on Vibro Stone Columns

Download our guide on Vibro Stone Columns and their associated foundations, and learn the recognised good practice for design and installation.

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Our Guide to Solution Features in Soluble Rocks

Find out what we consider good practice in relation to the design of foundations in soluble rocks with our Solution Features in Soluble Rocks Guide.

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10 documents you need to have ready for pile foundations

In this article we list the 10 crucial documents required for piling construction to help reduce any delays to your build.

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Foundation excavation and construction checklist

The following foundations checklist has been developed to support inspections and the risk management of LABC Warranty sites.

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Foundation, trees and clay

This technical update provides additional guidance on foundations, trees and clay.

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Heave: ground recovery following tree removal

This technical update provides additional guidance on Heave: time taken for the ground to recover following tree / vegetation removal.

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External wall fire safety for relevant tall buildings

Access our External Wall Fire Safety for Relevant Buildings: Elements Resource Tool

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LABC Technical Roadshows

Access a programme of technical events and seminars hosted by our partner organisation LABC.

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Level Threshold Checklist

Download our checklist on Level Thresholds to help you comply with the requirements for Building Regulations and LABC Warranty's Technical Manual.

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Our Guide to Laying Bricks and Blocks

Check out our Brick Layers Guide to help you build walls made to last that comply with Building Regulations and LABC Warranty's Technical Manual.

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New Home Warranty Buyer Checklist

Download our New Home Warranty Buyer checklist to help you choose the cover that is right for your development.

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Planning Process Flowchart

Download our Planning Process Flowchart which aims to help you successfully navigate through the planning process.

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Technical Newsletters

Download our latest technical newsletter update and get access to past copies too.

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Canopy Roofs Checklist

Discover when flashing and canopy trays are required, and the reasons why they are required with our easy to follow checklist on Canopy Roofs.

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Acceptable Tolerances in Brickwork for warranty cover

Section 1 of our Technical Manual summarises the LABC Warranty technical guidance on acceptable tolerances in brickwork. Download the chapter here.

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Tolerances in Internal Walls, Ceilings, Junctions and Floors

With the help of visuals and diagrams, learn more about the acceptable tolerances for key components to the interior structure of your construction.

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Guide to installing windows and glazing in high-risk areas

Extra care needs to be taken when installing glazing in higher-risk areas. Identifying those areas and taking measures to prevent injury are key.

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Our Structural Calculations Guide

Read our guide to understand the recognised good practice in relation to the content and provision of structural calculations when requested.

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Tech Update: Lift Pit Tanking Details

This guidance provides a solution for structural waterproofing of lift pits, on sites where there are no other structural waterproofing requirements.

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Tech Update: Podium Decks Guidance

Technical guidance for the design, use of materials and workmanship for podium decks to meet the functional requirements for warranty.

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Tech Update: Painting Over Intumescent Strips

This Technical Update article provides additional guidance on painting over intumescent strips.

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Acceptable Floor Levels in MMC

Are you using modern methods of construction to build new homes? Check out our guidance on acceptable floor levels for MMC builds.

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Tech Update: Mock Tudor Cladding

Mock Tudor cladding is an attractive option for homes, but needs great care in its construction. In this blog we explain the pitfalls to be aware of.

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Guidance for Magnesium Oxide Boards (MgO)

Find out more about our updated position on the acceptability of MgO boards for use in conjunction with LABC Warranty projects.

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Accounting for Movement in Concrete Bricks

How do you account for movement in concrete bricks? This article provides comprehensive answers.

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Building Control and Structural Warranty inspections

Homes with LABC Warranty cover benefit from two expert pairs of eyes – Building Control and Warranty Surveyors. But how are the two different?

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Guidance on Insulating Timber-Frame Buidlings

In this article we consider the installation of insulation in timber-frame structures with external brick cladding

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Generating Power at Home

One great way to make new homes more energy efficient is for them to generate their own energy. But what are the requirements for gaining a warranty?

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Positioning of Electrical Sockets and Switches?

Where should you position electrical sockets and switches? Read here for our warranty requirements.

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Getting Staircases Right in Single Homes

In this article we cover what you need to consider when installing stairs and staircases in private homes to ensure you get your warranty certificate

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Guide to Our Risk Management Site Inspections

Want to find out what are we looking for on site? Check out this blog where we guide you through our risk management site inspections

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Lightweight Bricks Slip "Sip" Composite Lintels

Find out more about our updated position on the use of lightweight bricks slip "sip" composite lintels

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Tech update: Laminated Glass

What are the advantages and disadvantages of using laminated glass? Read our Tech Update to understand more.

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Fibre reinforcement to concrete screeds

This technical update provides additional guidance relating to fibre reinforcement in concrete.

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Electrical consumer unit - position in new homes

This technical update article provides additional guidance on electrical consumer units and their position in new homes.

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Package sewerage treatment plants, septic Tanks and cesspools

This knowledge management article provides additional guidance on the use of package sewerage treatment plants, septic tanks and cesspools.

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Timber doors and window frames

This LABC Warranty technical update provides additional guidance on the use of timber window and door frames.

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Flashing systems, fake or alternative lead

This technical update provides additional guidance on the use of flashing systems, ‘fake’ or ‘alternative lead’, regularly used on sites.

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Radon Contamination

Radon is a naturally occurring radioactive colourless and odourless gas which is formed in small quantities by radioactive decay wherever uranium and…

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Roof tiling and underlays, the new BS 5534 standards

This technical update provides additional guidance on the 2014 and 2018 changes to BS 5534.

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Bricks, rammed earth

This technical update article provides additional guidance on the use of bricks, rammed earth.

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Canopy Flashing and Weathering Details

This technical update blog provides additional guidance on canopy flashings and weathering details.

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Floor decks: timber fixing requirements in domestic locations

This technical article provides additional guidance for timber fixing requirements in domestic locations.

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Heating systems - zone control systems explained

This technical update explains the requirements for a heating zone control system.

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Thatched roofs in new builds and conversions

This technical update provides additional guidance on the use of thatched roofs for detached dwellings for low rise new build and conversions.

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Cavity Trays – Major Projects Acceptance

LABC Warranty will accept the use of non-combustible cavity tray products for on a project by project basis prior to provision of full third party cer…

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Tech update: contaminated plasterboard

This technical article provides additional guidance on contaminated plasterboard, following concerns about products on the market.

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Guidance on suspended ceilings

This technical update provides additional guidance on suspended ceilings, in response to several instances of suspended ceiling failures.

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Cavity separating walls and gable walls and the use of lateral restraint

This technical update provides additional guidance on cavity separating walls and gable walls, and the use of lateral restraint.

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Pyrite contamination

This technical update provides additional guidance on pyrite contamination. Pyrite traces are found in sedimentary rock used to make backfill.

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Tech update - conservatories

Where conservatories are constructed to a new build property, they may fall under cover of the warranty.

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Drainage and sanitation

This technical article provides additional guidance on drainage and sanitation.

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Tech update - Japanese knotweed

This technical article provides additional guidance on Japanese knotweed, one of the most invasive plants in Britain.

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Tech update - lead neoprene joints

This technical update provides additional guidance on lead neoprene joints that can be used to form gutter details.

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Domestic shower and wet room construction

This technical article provides additional guidance on showers and wet room construction for domestic properties.

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Mortar bedded ridges and hips - mechanical fixing

This technical article provides additional guidance on mortar bedded ridges and hips and the use of mechanical fixings.

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Technical update - floor levels

Shrinkage, occasional poor workmanship and deflection can all cause problems with floor levels. This technical update outlines what to look for

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The need for a credible basement waterproofing specialist

Additional guidance on the need for a credible basement waterproof specialist - it is essential that the risk is managed by engaging appropriate speci…

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Blue roof guidance (and above-ground attenuation surfaces)

A blue roof is a flat roof or deck designed to provide controlled attenuation and management of rainfall to the sewer or outfall system.

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Technical update: piled walls

This technical article covers contiguous and secant piled walls and looks at when they can be used in basements.

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Guide to our site inspections

As well as using a stage-based inspection process, LABC Warranty takes a risk management approach to surveying. Learn how this works in practice

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Fibre reinforcement in lieu of traditional steel reinforcement

This technical update provides additional guidance relating to the use of fibre reinforcement in concrete, in lieu of traditional steel reinforcement.…

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Tech update - using oak in construction

This technical update outlines our approach to warranty cover for the use of oak in a range of construction environments.

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Tech update: Concrete lintels faced with brick slips

This update provides additional warranty guidance on the use of concrete lintels faced with bricks slips.

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Tech update: Through timber construction

This technical update provides additional guidance relating to the use of through timber construction.

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Tech update: Decorative slip facings

This technical update provides additional guidance on meeting our warranty requirements for the use of decorative slip facings.

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Tech update: Architectural brick detailing

Guidance on the use of architectural brick detailing and the effect it can have on the durability and service life of bricks.

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Major projects - on-site water testing for curtain walling and rainscreen cladding

Information to assist in meeting warranty requirements where rainscreen cladding and or curtain walling is proposed on a project covered by our warran…

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Tech update: assessing plywood specification

This technical document provides additional guidance relating to how plywood specifications can be assessed to meet the requirements of our Technical…

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Thermal bridging - what it is and how to prevent it

This technical document provides additional guidance relating to what thermal bridging (often referred to as cold bridging) is and how to prevent it.

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Specifying the use of timber externally

This technical document provides additional guidance relating to how timber can be specified for use externally within a construction project.

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Tech update: vapour control layers

This technical document provides additional guidance relating to the use of vapour control layers (VCLs) in construction.

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Minimum requirements for site investigations for self-build projects

This technical document provides additional guidance relating to our minimum requirements for site investigations for self-build projects.

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Major Projects: pre-cast concrete panels

Screening requirements for pre-cast concrete panelised construction manufacturers for use in major projects to be covered for warranty.

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Technical update: substitute materials

This update provides additional guidance relating to how the functional requirements in the Technical Manual may be satisfied where substitute materia…

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Major Projects: Zero falls flat roof policy

This article outlines our requirements to accepting zero fall flat roofs where the project is managed by the LABC Warranty Major Projects team.

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Ceramic floor tiling on domestic timber floors

Technical guidance for adding ceramic tiling on timber floors. Note, ceramic floor tiling is not included under the warranty policy cover.

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Major Projects: below ground structural waterproofing risk assessment

This update provides guidance on the requirements associated with the design and construction of basements and other below ground structures.

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Tech update: timber resin repairs

This update provides guidance relating to how the Functional Requirements in the Technical Manual may be satisfied with regards timber resin repairs.

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