Hello dear forum,
I have a question.
Due to delays caused by the pandemic, our builder now wants to use a screed with a drying accelerator. This would supposedly be ready for the floor covering after 5 days.
Of course, we are happy that we don’t have to wait 6 weeks for the heating phase.
However, we are also wondering if this type of screed has any disadvantages. I did some research online but couldn’t really find much, and many reports are quite old.
That’s why I thought I’d ask what you think about it.
For floor coverings, glued hardwood flooring is planned for the ground floor, floating hardwood flooring on the upper floor, and tiles in the upper-floor bathroom. In the basement, all rooms will have tiles except for the office, where we are installing laminate.
I would really appreciate your opinions.
Regards,
Ivonne
I have a question.
Due to delays caused by the pandemic, our builder now wants to use a screed with a drying accelerator. This would supposedly be ready for the floor covering after 5 days.
Of course, we are happy that we don’t have to wait 6 weeks for the heating phase.
However, we are also wondering if this type of screed has any disadvantages. I did some research online but couldn’t really find much, and many reports are quite old.
That’s why I thought I’d ask what you think about it.
For floor coverings, glued hardwood flooring is planned for the ground floor, floating hardwood flooring on the upper floor, and tiles in the upper-floor bathroom. In the basement, all rooms will have tiles except for the office, where we are installing laminate.
I would really appreciate your opinions.
Regards,
Ivonne
I recently discussed the topic of accelerators with the construction manager. He smoothly dismissed it. We are getting calcium sulfate screed/anhydrite screed, and accelerators are more suitable for cement screed.
Is that correct? I found some references to accelerators under that keyword on the internet.
Our construction manager estimates 3 to 3.5 months from screed installation to handover of the house. Since the screed is now delayed due to rework on the concrete ceiling, I expect to move in at the end of October or beginning of November, instead of mid-September.
I understand the construction manager’s initial reaction as an effort to avoid additional costs for the accelerator. However, with the contractually agreed penalty clause, shouldn’t he at least be able to invest €5 per square meter to meet the deadline and ensure a satisfied homeowner, or am I missing something?
Is that correct? I found some references to accelerators under that keyword on the internet.
Our construction manager estimates 3 to 3.5 months from screed installation to handover of the house. Since the screed is now delayed due to rework on the concrete ceiling, I expect to move in at the end of October or beginning of November, instead of mid-September.
I understand the construction manager’s initial reaction as an effort to avoid additional costs for the accelerator. However, with the contractually agreed penalty clause, shouldn’t he at least be able to invest €5 per square meter to meet the deadline and ensure a satisfied homeowner, or am I missing something?
N
nordanney29 Jun 2021 07:27OWLer schrieb:
I recently discussed the topic of accelerators with the site manager. He dismissed it rather simply. We are getting calcium sulfate screed/anhydrite screed, and accelerators are more common for cement screed.
Is that correct? I found references to accelerators when searching online.
Our site manager is expecting 3 to 3.5 months for the handover after screed installation. Since the screed is now delayed due to rework on the concrete ceiling, I expect us to move in only by the end of October or beginning of November, instead of mid-September.
I understand the site manager’s initial reaction to avoid extra costs for the accelerator. But with the contractually agreed penalty, shouldn’t he be able to invest at least €5 per square meter to meet the deadline and ensure a satisfied homeowner, or am I missing something? Accelerators are also possible and common with your calcium sulfate screed (e.g., Mebofix). You can significantly reduce the time until the screed is ready for covering. However, the effect is even greater with cement screed.
nordanney schrieb:
Accelerators can also be used with your calcium sulfate screed and are quite common (e.g., Mebofix). You can significantly reduce the time until the floor is ready for covering. However, the effect is even more pronounced with a cement screed.Thanks for the search term. So with the accelerator, the floor would be ready for covering after about 1 month, reducing the original time from around 2 months to 1 month. That would definitely make the builder very happy. 😉
N
nordanney29 Jun 2021 09:57OWLer schrieb:
With the accelerator, the floor would be ready for covering after about 1 month.With an accelerator, you can be ready for covering in just 1.5 weeks. For me, it was 7 (seven!!!) days with a cement screed.OWLer schrieb:
Reduction from about 2 months to 1 month.Uh, without an accelerator, an average calcium sulfate screed is ready after at most 4 weeks, not two months. 1. Seven days of no activity
2. About one week of functional heating
3. About one week of drying heating, depending on the screed thickness and CM measurement
Heating protocols for calcium sulfate screeds usually look like this or similar.
I am still waiting for feedback from the general contractor. My current understanding is that we can start the painting work about 4 weeks after the screed, followed by another 4 weeks.
I believe I was given a period of 6 weeks for the floor to be ready from the contractor’s side.
Regarding Mebofix, I found this information:
How fast does a calcium sulfate screed actually dry?
Under normal building conditions, the drying time of a calcium sulfate screed can be estimated using a simple formula:
“Thickness of the screed squared multiplied by the factor 1.6.”
This relationship, borrowed from concrete technology, results in a drying time of 6 cm (2.4 inches) x 6 cm (2.4 inches) x 1.6 = 57.6 days for a 6-centimeter (2.4-inch) thick screed — almost two months!
In my opinion, what is done during the period between screed and moving in seems like only minor work, or am I mistaken?
Setting up equipment for heating and ventilation
Water, pipes, lift pump
Tiling
Steel stringer staircase
(House) doors
Completing electrical installation
Painting work
Flooring installation
Touch-up work
I believe I was given a period of 6 weeks for the floor to be ready from the contractor’s side.
Regarding Mebofix, I found this information:
How fast does a calcium sulfate screed actually dry?
Under normal building conditions, the drying time of a calcium sulfate screed can be estimated using a simple formula:
“Thickness of the screed squared multiplied by the factor 1.6.”
This relationship, borrowed from concrete technology, results in a drying time of 6 cm (2.4 inches) x 6 cm (2.4 inches) x 1.6 = 57.6 days for a 6-centimeter (2.4-inch) thick screed — almost two months!
In my opinion, what is done during the period between screed and moving in seems like only minor work, or am I mistaken?
Setting up equipment for heating and ventilation
Water, pipes, lift pump
Tiling
Steel stringer staircase
(House) doors
Completing electrical installation
Painting work
Flooring installation
Touch-up work
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