NHBC, the leading warranty and insurance provider for new homes in the UK, will be holding a further series of seminars to increase industry awareness of problems relating to external walls.
The events, which are free and available to all NHBC registered builders, were originally held last year following analysis of the large number of claims received during the extreme winter period the UK experienced in 2013/14.
Around two-thirds of the claims reported during these months were in relation to external wall and roof issues; external walls being the predominant issue with an increase of more than 150 per cent over ‘normal’ levels.
Chris Derzypilskyj, NHBC’s Technical Projects Manager, explained:
“We were greatly encouraged by the feedback to our initial round of seminars and we hope these new dates will reinforce the key messages in addressing the re-occurring problems with external walls. The main aim of the seminars is to provide detailed information on best practice, focusing on key areas such as structure, render, cavity trays and DPCs, to provide a national and regional overview of the claims experience as well as feedback on current site experience.”
In greater detail, the main areas of focus are set to include:
Consistently over the last four years the main failures have been de-bonding from the substrate, shrinkage and thickness/number of coats (background preparation, application and cracking)
Cavity Trays and DPC’s
Incorrect installation of horizontal and stepped trays – including linking to flashings
Poor installation of product e.g. at corners, cavity trays/lintels, wrong product for exposure, retention within the cavity and reduced cavity widths.
This will cover bridged cavities, installation of wall ties, movement joints and settlement.
To help enable site managers to attend, the sessions will be taking place at 4.30pm to 6.30pm.
Thursday 25th February – Southern – Shendish Manor, Hemel Hempstead
Tuesday 1st March – South West – Leigh Court, Bristol
Tuesday 8th March – Scotland – Westerwood Hotel, Cumbernauld
Thursday 10th March – North West – Thistle Haydock Hotel, Haydock
Tuesday 15th March – North East – York Racecourse, York
Thursday 17th March – South East – Sandown Racecourse, Esher
Tuesday 22nd March – East – Cambridge Belfry, Cambourne
Tuesday 5th April – West – National Motorcycle Museum, Birmingham
Thursday 7th April – Northern Ireland – Hilton Templepatrick, Belfast