Just got the go ahead for a job ply and van gogh but customer is worried about the floor being cold in winter as they have a lot of air flow coning up through old floor boards and the builder mentioned to her about jumpax helping with the insulation of karndean, so can you fit karndean onto jumpax, do you need to feather finish joints, and does karndean ps have to be used or another glue
Karndean have there own version called Versalay if i remember correct. Dont forget that you need to leave expansion fitting that stuff which includes the product itself (karndean). As your putting plywood down there wont be any drafts. Not really sure if there will be a noticeable difference in temperature between direct laying or floating.
Jumpax helps insulate alot on a concrete floor, not sure about wood. Dont need to feather edge the joins. If the skirtings are off and you undercut the door frames your sorted
Skirtings are on and I don't want to get involved in removing them as custoer said there around 90 years old, think just going to have to talk her into 9 mm ply fixed down
insulated subfloors dont necessary mean the subfloor will be warmer. It will however reduce the amount of heat lost through them. But as heat rises again its minimum. Dont forget that insulation is purely there to stop heat loss, it does not actually make something warmer. It will however mean that your heating source can run cooler for the same results. As Merit has said. On concrete floors it does make the biggest difference. My house has a mixture so i have taken some temp reading for you so you can see what the difference is. All my rooms are heated and controlled by rad stats so all maintained at same heat apart from the garage that i have set lower. (yes my garage is heated as im a very sad person that likes to be warm when preparing car for weekend racing) The results Garage- 16.2c air temp with insulated concrete floor but no floorcovering = 13.5c floor temp. Hall- (two halfs) 20c air temp with Insulated concrete with no floorcovering = 16c floor temp. Hall- (old floor) 20c air temp quarry tile floor direct to earth (with epoxy dpm ) karndean installed = 17c Dinner- 20c air temp wooden floor with insulation but no floorcovering = 17c kitchen- 20c air temp wooden floor, No insulation with Karndean installed = 18c Now that is confusing results and not what you would expect. The floors with insulation have a higher temp drop by 1c on average ! However the non insulated floors do all have karndean installed on them that seems to work well as a insulation on its own. Its a shame i dont have a insulated floor with karndean installed to see if it raises the temp.
