C
Clifflev
Hello. I have had Wunda overfloor heating panels installed to approx 70m2 area. When the flooring company came to lay our quickstep laminate arte floor tiles (640x640) they said the floor wasn't level enough as many of the underfloor heating pipes where raised about 2-3mm above the aluminium boards and concerned that the 2mm underlay would not be sufficient to sort it.
I contacted Wunda who advised to lay Mapei Eco Prim Grip and then Mapei Ultraplan Renovation Screed. This was done in about a 5 hour timeframe one night last week (by the same people laying the new floor)
When the floor guy came the next day, there were a few sections where the screed went under the Wunda heating panel and raised them and the pipe up quite high - about 1.5cm. The screed was dug out and the pipe secured down and infilled with more screed (sorted). They came the next day but found a larger area had blown up in the hallway - this has been dug out and is waiting to be filled again (its now xmas so have to wait for them to come back in the new year)
Now, when walking across certain areas i can hear cracking and there are some small raised areas (about 5cm x 5cm) - like an air bubble.
I'm concerned why there are air bubbles?, perhaps the screed was laid in a bit of a rush? i.e the primer didn't have time to dry sufficiently?
whats the best thing to do here? Can an extra layer of screed go on top of what has already been laid? Wunda recommends 5mm but i dont think this has been achieved, i reckon i have 2-3mm. Going on top of the screed is 2mm quickstep insulation (breathable, designed for underfloor heating) and then 9.5mm quickstep laminate arte floor tiles (640x640)
The flooring company have been helpful and assured me they want the flooring to go down nicely and want to do a good job - i just want some peace of mind as dont want issues further down the line.
Many thanks for your help and advice.
I contacted Wunda who advised to lay Mapei Eco Prim Grip and then Mapei Ultraplan Renovation Screed. This was done in about a 5 hour timeframe one night last week (by the same people laying the new floor)
When the floor guy came the next day, there were a few sections where the screed went under the Wunda heating panel and raised them and the pipe up quite high - about 1.5cm. The screed was dug out and the pipe secured down and infilled with more screed (sorted). They came the next day but found a larger area had blown up in the hallway - this has been dug out and is waiting to be filled again (its now xmas so have to wait for them to come back in the new year)
Now, when walking across certain areas i can hear cracking and there are some small raised areas (about 5cm x 5cm) - like an air bubble.
I'm concerned why there are air bubbles?, perhaps the screed was laid in a bit of a rush? i.e the primer didn't have time to dry sufficiently?
whats the best thing to do here? Can an extra layer of screed go on top of what has already been laid? Wunda recommends 5mm but i dont think this has been achieved, i reckon i have 2-3mm. Going on top of the screed is 2mm quickstep insulation (breathable, designed for underfloor heating) and then 9.5mm quickstep laminate arte floor tiles (640x640)
The flooring company have been helpful and assured me they want the flooring to go down nicely and want to do a good job - i just want some peace of mind as dont want issues further down the line.
Many thanks for your help and advice.