The message arrives, the information goes missing
A site WhatsApp group usually starts on day one, when someone asks where the key is. It is fast, free and already on everyone's phone. That is why almost every small construction company uses one, and for getting a message across it works well.
The trouble starts later. Without anyone deciding it, the group also becomes the record of decisions, the photo archive and the task list, and it was built for none of these. When someone asks six months later when the partition wall move was agreed and who approved it, the answer is somewhere among four hundred messages.
This article looks at where the group fails, what that costs, and how to decide when site communication should move into the project itself.
Four places where the group fails
Search does not find what you are looking for. WhatsApp search finds words. The question is rarely "what was said on 14 March", but "when did we agree on the bigger tiles". If the client wrote "let's go with 60 x 60 after all", searching for "tile" finds nothing.
A decision looks like any other message. The group holds hundreds of messages, a handful of them decisions. They look no different from "I'll be there at eight", so a month later the decisions live only in people's memory.
A task has no owner and no status. "Could someone pick up those battens tomorrow" goes to everyone, so nobody owns it. A finished task leaves no mark, and the same thing gets a second reminder even though it was done the first time.
The material sits on a worker's phone. Photos and messages are stored on personal devices. When a worker leaves the company, or a phone breaks without a backup, their photos and the instructions they were given leave too. The company cannot ask for them back, because it never controlled them.
None of this is WhatsApp's fault. A messaging app is made for conversation, not for keeping a project's records.
What one lost message costs
Take an ordinary renovation. Partway through, the client asks to move the kitchen partition wall 40 centimetres. The site manager replies "no problem" in the group, the crew makes the change, and with demolition, new framing and boarding it takes 22 hours and 380 euros of materials.
Invoiced at 55 euros an hour with a margin on materials, that is about 1,650 euros excluding VAT. At the final invoice the client does not remember asking, or remembers it as a small adjustment they assumed was included. The message exists, but nobody can find it, and to avoid a dispute the extra work is left off the invoice.
With five sites a year, several such cases are easy to collect. Three of them already cost around 5,000 euros, which for a small company is often more than all its software costs for the year.
Written evidence you cannot produce
In construction, communication is also a legal matter. Under the Finnish general conditions for building contracts (YSE 1998), and the KSE 2013 terms used in consumer contracts, the starting point is that changes and extra work and their price are agreed before the work begins, preferably in writing. In a dispute, the outcome often depends on which party can show what was agreed.
The client's message "let's do the tiles bigger after all" is written evidence. It does not help if nobody can find it, if it has no price, or if it was written in a group the client has since left. You think you are covered when you are not.
The same goes for photos. A photo of a rotten bottom plate justifies extra work, but only once you know which site, which spot and when it was taken. WhatsApp compresses photos and strips part of their data, and a year later the photo is an undated file in someone's gallery.
Extra work should therefore always get its own record with a description, a price and the client's approval. A message in the group can be where it starts, but it does not replace the record. More on this in the article on managing extra and variation work.
Not all messages are equal
A day on site produces four kinds of messages, and each has a different lifespan.
Coordination: who is coming, when, what to bring. Out of date by the end of the day.
Questions: which way the fall goes, where this one goes. Out of date once answered, unless the answer departs from the plan.
Observations: found rot, a guardrail is missing, the delivery was wrong. These never go out of date, because they turn into extra work, complaints and safety fixes.
Decisions: we do it differently from the drawing. These never go out of date, and losing them is what costs money.
Most of the traffic is coordination. That is why the group seems to work: most messages are fine to lose. The problem is the small share that should be kept, because it disappears just the same.
