What makes the SMART construction system resilient?
Hello and welcome, I am Blair Jacobs for Swift TV here for the fourth in our series looking at ‘What makes SMART smart?’
The focus of this video is Resilience and to find out more about that, Chris Milburn from the Swift Group is with me.
What exactly do we mean by resilience in relation to SMART?
Well resilience has many facets but I think in the context of the SMART construction then really what we are focusing in on here is the durability of the construction and also the new material that forms the basis of the new SMART construction: PURe which is impervious to water.
So what do we do if water does get into the caravan?
Well firstly the vast majority of our customers won’t ever experience water getting into the caravan but in the rare situation that it does, then water is it breaches the seals will be absorbed by the timber that is inside the construction.
Obviously that can be repaired but it is a major inconvenience to anybody who has had to go through that. That’s why we at Swift have introduced a new material PURe, which is a non-absorbent polyurethane material which we are using in preference to timber and to blown polystyrene which is used by some other manufacturers in the UK.
Why choose PURe then over and above these other products?
Well Blair, we have set up some demonstrations so let me show you why we have chosen PURe.
The first test is a particularly extreme test where see how the materials absorb water.
So first and foremost we start with the three materials, we’ve measured each of them for water content, we’ve then weighed them and then we put them in a container and pour over the top of the container water which has got food dye in it to make it easier to see. And we leave those submerged in that water for up to 6 hours to see which of those materials absorbs the water the most.
Tell me about the second demonstration?
Well Blair, the main concern that we have at Swift with blown polystyrene is the fact that it has veins in it and I’ve got an example of some here.
Those veins if water was to get in which it could do potentially through a screw, screwing into the material, water tracking down the screw and into the material then it could drain into other parts of the caravan particularly the floor and other areas. So what we’ve got here is we have set up a demonstration, where we have taken three pieces of material: timber, PURe and blown polystyrene and we have drilled a little well in the top and we have inserted into the top of that a plastic tube. Now we fill each of those tubes with water with dye in it, first the timber, secondly the PURe and then last of all the blown polystyrene and you can see that the water has run right through the blown polystyrene and out of the bottom but on the other two: the timber and the PURe the water is still in the tube. Now we make a mark on that and we will come back in a few hours’ time to see if that water level has dropped.
OK Chris, 6 hours have passed now talk me through the results.
Well let’s go through the first experiment. To make sure there is no excess water left on the pieces they are first dried and then we check the moisture content. Not surprisingly the timber showed a marked increase from 8% to 25% but the PURe and the blown polystyrene showed no change at all.
The pieces were then weighed. The timber increased by 10%, the PURe remained as it was at 41gms and the blown polystyrene increased by nearly 30%.
The blown polystyrene result reinforces what we said earlier that water can run into the material but also it can be retained by the material.
After 6 hours, the level of the water in the PURe tube has remained unchanged but what we can see is that the level in the timber tube has reduced slightly.
So what does all this tell us then?
What it tells us is that Timber aborbs water but at a relatively slow rate. What we can see from the blown polystyrene is that water enter into the material and is retained by the material and this can potentially leak out at a later date or could indeed freeze and what we can see from the experiment is that PURe doesn’t absorb water at all and that’s why we use it in Swift caravans.
Well Chris amazing results thank you for spending some time with us, thanks Chris. So there you are it does look like using SMART with PURe is the SMART way forward.