The CPD Roadshow was attended by eight people including myself.
The Hamworthy Club staff were very helpful and, due to the small number of attendees, provided iced water in the room and made coffee / tea and biscuits available to collect from the bar.
Only the one room was available for us to use and the CPD providers therefore set their information stands in the back of the room.
I was able to assist and have a chat while setting up with Laurence Parker, Michael Vernon and Ian Thick but Olcay Parrika was running late. Olcay attended on time and gave her presentation and had to leave before the end but there was no real interruption to the meeting.
I gave a very brief introduction including ‘housekeeping’ at which point the CPDs commenced.
Laurence Parker from Simpson Strong Tie – Building Safer Structures
The presentation was very good and there were some good learning points.
What will stick with me was the ‘coding’ used for fixings of bracketry. If the bracket contains a round hole it must be nailed. All other holes are different shapes for various uses mainly for enhanced strength or fixing in awkward positions.
Laurence covered a good range of their products including the Safety Fast Lite Hanger and their portal frame system for anti-racking of timber frames.
Laurence also introduced a very simple but very useful bracket developed for joining SIP panels and finished with a basic detail of Simpson strong tie various resin fixings including a report of why Polyester Resin must not be used with concrete.
Olcay Parrika from Guardian Glass UK – Glass as a design material
Olcay introduced Guardian glass and explained that although the company was American, Guardian supplied glass within the UK from their factory in the UK.
Olcay explained and gave examples of the types of glass used including annealed, toughened and heat soaked which would normally make glass containing a high concentration of Nickel Sulphide fail during manufacturing. This was important as a high concentration of Nickel Sulphide in tempered glass can cause ‘spontaneous’ breakage.
Olcay explained about the various types of safety glass and where they are best used and also covered a basic understanding of ‘thermal shock’ which can cause glass to beak when the range of heat across one pane of glass is too large.
Olcay also spoke about the various coatings compared to the older forms of ‘body tint’. These coatings on the glass can be used to keep heat out of a building or insulate the building from heat loss and the position within the sealed unit is very important. At present the best performing double glazed sealed unit can give a performance of Ug 1.0 W/m2K. Olcay explained that the overall performance of a window would be less due to the lower performance of the frame.
Michael Vernon from Delta Membranes – Structural Waterproofing (xhead)
Michael gave a very informative overview of how Delta complied and, in many cases, exceeded the requirements of BS 8102:2009.
He explained about the three types of structural waterproofing including Type A which most people understood to be called ‘Tanking’ normally applied to the outside of the structure and covered.
Type B was explained as being ‘integral’ and normally by means of an additive to concrete and then the last type was Type C being an internal drainage system.
Michael went on to explain about the ways in which to combine the systems and covered in depth types of drainage system and channels and why certain advisory documents may not give good advice. Michael advised that when using a drainage system within a cavity wall construction, it was necessary to install a robust cavity tray at the standard DPC height above ground level to make sure the drainage system did not have to deal with other leaks in the building which could be eliminated above ground level. It was also interesting to understand why drainage systems fail and that a simple ‘flooding test’ prior to the drainage being covered with the building finishes can save real issues in the long run. Lastly Michael covered the Delta solutions for decked roofs and podiums and gave details of how drainage can be detailed to mitigate issues and types of finishes to allow for future maintenance.
Ian Thick from Visqueen – Membranes for gas and contamination within the ground
Ian started with an overview of Visqueen and why the company was very well placed within the UK to offer a full range of solutions. Ian talked about the current regulations and legislation and explained about the solutions they provided. Ian explained in depth about the various types of gas and contaminants and how they differ within the environment requiring different solutions.
Ian also explained about how important it was to carry out a full survey and testing of the ground in the surrounding area as any issues could be mitigated by either removal of localised ground contamination or moving of the position of the building. It was important to hear why different specifications need to be used for different types of contamination and Ian explained why a standard damp proof membrane in the UK is produced from recycled polymers and therefore cannot be guaranteed to give any form of protection whereas specific membranes made from virgin polymers can be designed accurately. Ian went into detail about the various ways to join membranes and how it was important to use the required and specified tape systems. He explained that one type of tape is used to bond and seal the membranes and then a second tape is applied at the overlap to stop concrete pulling the joints apart when its being laid in a liquid state.
Ian gave instances of current projects he is involved with and completed by answering questions.
The CPD event closed at about 13.15. I thanked the delegates for attending and thanked the speakers for their professional and informative presentations.
I did talk about buildeng SW and asked the delegates if they were going. The replies were positive. I mentioned about the 25% off for a booking of four or more if they had friends wanting to attend and had printed the flyer Adam had produced for anyone interested.
Andrew Seller C.Build E MCABE
South West Regional Secretary