Finished a job off before Christmas in a new kitchen extension that I laid the electric under floor heating matting and as much as I stressed to the customer that the floor temp must not exceed 27 degrees I found out yesterday that she has been running it daily up to 32 degrees She called me back to look at another room that needs doing and soon as I entered the kitchen I could tell it was roasting. Checked it all over but nothing seems to have moved or came unstuck luckily but have told her no more than 27 degrees from now on. It's been running like this for over 2 months yet all is OK so I'm wondering is the 27deg limit for lvt isn't all that important after all... Anyone else had experience with lvt that's been pushed over the recommended limit? I run mine at a max of 25deg and use it as a primary heat and that's a 150w matting but sometimes I do think id like just that little bit more especially how cold its been. Her kitchen was prep'd with cement boards, 150w mats and 10mm of renovation. Wet set with ke49
Never knew there was a limit if the right adhesive has been used? Sorry it’s a limit on adhesive and not the tile?
Which lvt? Quickstep and moduleo can take a lot of heat. Some of them don’t like it at all. The HT adhesive will defo help. Must be good for well above 27 degrees
Am I missing something here, but a floor in a fully glazed conservatory can reach way higher than 27 degrees and 32. So why would it matter the ufh is that high?
I’m sure it’s 27 degrees, seen that on a few lvt manufactures sheets. Or maybe is allowed to withstand more because of ceiling to floor windows etc as we know that can be higher but that’s out of our control.
That would be air temperature and not floor temperature. I've got a an ensuite at home to do so I'm going to test it out at say 35 degrees worse case is ill have to redo it if it sets alight and my house don't burn down lol
Never really thought about it that way, maybe that's why alot of lvt lifts due to the poor adhesive and technique!
I do remember the karndean rep telling me years ago that the high temp causes discolouration so I guess that could be why they state a limit but as you say, you can't turn the dial down on the Sun
Yeah 27 degrees, however my assumption would be if it’s consistently at 32 degrees it’s not an issue, if it drops to 12 and goes back to 32 etc it would cause more of an issue I’d expect, plus 49 is decent
Parquet seems to be a lot more stable than planks. It’s a smaller piece of pvc. In fact I don’t think I’ve ever seen a parquet lvt shrink, not like headers on planks.
Well yesterday she phoned me and said she's been leaving it on 27 but doesn't feel warm enough so whacked it back up to 32 lol she's fully aware if anything goes wrong then I'm not liable. It's a 40m2 kitchen diner and she's using the ufh as primary heat at 32 deg, it was way to warm in there for me when I went in and her son said the same that she moans she's cold all the time so left it with her.
I did think there was some sort of issue with the heating up of the mats but it's all OK. Feels clammy in there
