Dear users,
I am planning to buy and renovate a house in Bavaria (built in 1963) and came across the following information in the documents:
Floor: 2cm (0.8 inches) asphalt screed with 1.5cm (0.6 inches) Gerrix impact sound insulation, topped with oak parquet flooring.
Should I remove the screed during renovation or leave it in place and try to install underfloor heating above it? Or should I skip the underfloor heating if it seems too complicated?
What is Gerrix? Do you think it might contain PAHs? I couldn’t find any information about it online.
Best regards and thanks!
I am planning to buy and renovate a house in Bavaria (built in 1963) and came across the following information in the documents:
Floor: 2cm (0.8 inches) asphalt screed with 1.5cm (0.6 inches) Gerrix impact sound insulation, topped with oak parquet flooring.
Should I remove the screed during renovation or leave it in place and try to install underfloor heating above it? Or should I skip the underfloor heating if it seems too complicated?
What is Gerrix? Do you think it might contain PAHs? I couldn’t find any information about it online.
Best regards and thanks!
"Gerrix" glass wool, for example, was manufactured in Bergisch-Gladbach. I am not sure if it was suitable for use as impact sound insulation (ISI). However, I have often found glass wool beneath screed floors that was completely compressed and apparently did not meet the necessary quality standards to be used as ISI. Such a construction cannot be reused during a renovation.
The adhesive used for parquet flooring may contain asbestos or polycyclic aromatic hydrocarbons (PAHs). The asphalt screed may also possibly contain asbestos, phenols, or similar substances. In any case, I would recommend analyzing all building materials in this type of floor assembly before removal and then completely removing everything down to the structural ceiling. To install underfloor heating with wet or dry screed, you need adequate build-up height, including a new impact sound insulation layer and possibly a leveling compound over the uneven structural ceiling. A wet screed could potentially impose too much weight on an existing ceiling structure; this needs to be verified by a structural engineer beforehand.
Additionally, underfloor insulation may be required according to building energy regulations if the floor construction is against the ground or above unheated (basement) rooms. The sufficient heating capacity of the underfloor heating system must be demonstrated through a heating load calculation according to DIN 12831.
The adhesive used for parquet flooring may contain asbestos or polycyclic aromatic hydrocarbons (PAHs). The asphalt screed may also possibly contain asbestos, phenols, or similar substances. In any case, I would recommend analyzing all building materials in this type of floor assembly before removal and then completely removing everything down to the structural ceiling. To install underfloor heating with wet or dry screed, you need adequate build-up height, including a new impact sound insulation layer and possibly a leveling compound over the uneven structural ceiling. A wet screed could potentially impose too much weight on an existing ceiling structure; this needs to be verified by a structural engineer beforehand.
Additionally, underfloor insulation may be required according to building energy regulations if the floor construction is against the ground or above unheated (basement) rooms. The sufficient heating capacity of the underfloor heating system must be demonstrated through a heating load calculation according to DIN 12831.
One more question:
The screed seems to contain tar or some other substance.
The floor is now 60 years old.
Do we have to or should we remove everything down to the concrete? The advantage would be that we wouldn’t have to debate whether to install underfloor heating…
Disadvantage: the cost.
What do you think?
The screed seems to contain tar or some other substance.
The floor is now 60 years old.
Do we have to or should we remove everything down to the concrete? The advantage would be that we wouldn’t have to debate whether to install underfloor heating…
Disadvantage: the cost.
What do you think?
Similar topics