Mee name's Allen Hart and in today's video we're gonna be installing underfloor heating in my garage. We've got Dave here from Pro-Warm. Dave's gonna tell us a little bit about the underfloor heating and then we've got Kieran and Kieran's gonna help us install the underfloor heating as well. But he's gonna be doing most of the work and I’ll be having a watch. (laughs) - Dave, can you tell us a little bit about what we've got here? - Yeah, so we're basically installing a high output in-screed wet system. Just as a quick overview, we've got our manifold, which is what we're gonna connect all our pipework to, and staple the pipework down.

And the other bits and bobs we'll talk more about as we're getting in with the install. - And Kieran, what are you gonna be doing on this? - All of the work, apparently. (laughs) Everyone's just gonna watch me.

So we've removed the manual vent valves that come fitted to the manifold as standard.

And we've replaced the top one with an automatic air vent just to reduce the likelihood of air locks and just make the system easier to maintain in that regard. And on the bottom one, we've taken,

obviously taken the vent valve out and replaced it with a pressure gauge so that we can see what pressure the system is at, at any given point in time. And we can do so without hooking up any external tools or equipment to the manifold. We just, at a glance, can look at this gauge and see and make sure that the system is retaining the correct pressure. And once we've filled it up and pressurised it ready for the screeders,

we can make sure that it's holding pressure before we leave without hooking anything up.

So Kieran’s installed the manifold on the wall now. What's next? What's Kieran doing now? - Yeah, so the next thing for us to do is to start putting this stuff down. So this is called a laminon. It's a grid membrane and it's also a vapor barrier. So basically it just adds to the sort of damp roofing, like a visqueen of like that type of material would. And each one of these little squares is 50 mil. So as we're spacing it at 150, we're just gonna go three squares along with the pipe work and it'll make our life a lot easier.
So this stops the liquid screed, damaging the insulation? - Yeah. You see we've got that slight upturn against the wall. So that's just gonna make sure that no screed can get behind and start lifting the insulation boards up.

So Kieran, you put the membrane down now. What's next? - So basically now we need to install this edging insulation. So the purpose of this is to stop your heat going into your walls, basically you're losing heat through the external walls.

So yeah, this will just go all around the perimeter, around the edge of the walls. - Yeah. - Yeah, and basically just put that in for that. - And that also allows a little bit of expansion. - Yeah, expansion for your concrete as well. - Yeah, and what I noticed on this as well, it's got like a sticky backing, right? - Yeah. - So that makes it a lot easier. - It does. - To stick on. - A lot easier, yeah. So basically it's got a backing on it here. So once we put that in, this basically just sticks straight to the wall. So it's very easy to install as well.

So you're just finishing off this first loop now with this underfloor heating. Could you tell us a little bit about this underfloor heating and why are you suggesting that I should have this for my house? - First of all, obviously the manifold's got four circuits on it. - Yeah. - So there's a maximum amount of pipe that you can put on one run. So that's a hundred meters. Otherwise, if you run the pipe for too long, what happens is you get too much of a differential between the flow and the return. - Right, okay. - And then, you know, the first part of the circuit's nice and warm, and then the end part, it's giving up all of its heat and there's nothing left. So we've gone with four circuits to make sure we've got a nice, even heat distribution across the whole floor and consistent heating for the whole entire space. That's sort of point of note number one. - And what is the system? What's it called?

- This is just what we call an in-screed staple system. So where you're gonna have the new screed put down in a couple of days, the pipe sits within the screed, and we're just stapling it down onto the insulation just so that it doesn't move or come to the top or just to hold it nice and secure for the screed to go over the top. - Why have you gone with this over a different type of system? - So we've got two other methods available. We've got a clip rail, which is like a long strip. If you imagine like a carpet gripper for pipe, we've got that kind of system, and then we've also got what we call an egg crate or a castellated system panel where you just sort of lay it down and it sort of clips in.