ᐅ Finishing Cement Screed in Garage – Is 6 cm Thickness Enough?
Created on: 12 Oct 2018 21:20
C
Crimson
Hello everyone,
I have a small problem.
We plan to install a cement screed in our garage.
The garage is 5m (16 feet) wide and 6m (20 feet) long.
On top of the concrete slab, the floor buildup will be 21cm (8.3 inches) at the highest point and 18cm (7.1 inches) at the lowest point (to accommodate the slope).
The contractor responsible suggested installing 12cm (4.7 inches) of Styrodur insulation everywhere, in two layers of 6cm (2.4 inches) each. A perimeter insulation strip should be placed along the edges, and a layer of construction foil laid on top of the Styrodur.
My question is: Is a 6cm (2.4 inches) cement screed sufficient to support the weight that will be on it later?
And is this buildup acceptable as planned?
Best regards, Crimson
I have a small problem.
We plan to install a cement screed in our garage.
The garage is 5m (16 feet) wide and 6m (20 feet) long.
On top of the concrete slab, the floor buildup will be 21cm (8.3 inches) at the highest point and 18cm (7.1 inches) at the lowest point (to accommodate the slope).
The contractor responsible suggested installing 12cm (4.7 inches) of Styrodur insulation everywhere, in two layers of 6cm (2.4 inches) each. A perimeter insulation strip should be placed along the edges, and a layer of construction foil laid on top of the Styrodur.
My question is: Is a 6cm (2.4 inches) cement screed sufficient to support the weight that will be on it later?
And is this buildup acceptable as planned?
Best regards, Crimson
M
Mottenhausen18 Oct 2018 15:42May I briefly ask a question in this context (as this is still undecided in our planning): What is the recommended slope for a garage? Is it realistically possible to ensure runoff of slushy snow water with practical slopes, or is that a misconception?
Hello "Mottenhausen".
This question is not easy to answer.
It depends on the roughness of the surface and ultimately also on the type of surface protection applied.
This means: For a tiled surface, a steeper slope is necessary due to the joints than for a smooth surface protection like a sealant or resin coating.
In the construction industry, a slope of approximately 1.5% is assumed for smooth surfaces and about 2.5% for rough surface textures when surface water should drain by itself. However, this must be planned according to the length of the garage in terms of height. For example, assuming a length of 6m (20 feet), the drop at the rear of the garage would be 9cm (3.5 inches).
There is no binding regulation requiring a general slope in garage floors.
However, the condition that no "reverse slope" (counter-slope) towards the walls or, depending on the architecture, towards the residential building must exist should definitely be observed.
If a drainage channel in the garage floor has already been structurally omitted, surface water can only be directed outward, meaning towards the garage door. A drainage channel parallel to the door should be installed to ensure that, in any case, rainwater cannot enter the building through the garage entrance.
Best regards, KlaRa
This question is not easy to answer.
It depends on the roughness of the surface and ultimately also on the type of surface protection applied.
This means: For a tiled surface, a steeper slope is necessary due to the joints than for a smooth surface protection like a sealant or resin coating.
In the construction industry, a slope of approximately 1.5% is assumed for smooth surfaces and about 2.5% for rough surface textures when surface water should drain by itself. However, this must be planned according to the length of the garage in terms of height. For example, assuming a length of 6m (20 feet), the drop at the rear of the garage would be 9cm (3.5 inches).
There is no binding regulation requiring a general slope in garage floors.
However, the condition that no "reverse slope" (counter-slope) towards the walls or, depending on the architecture, towards the residential building must exist should definitely be observed.
If a drainage channel in the garage floor has already been structurally omitted, surface water can only be directed outward, meaning towards the garage door. A drainage channel parallel to the door should be installed to ensure that, in any case, rainwater cannot enter the building through the garage entrance.
Best regards, KlaRa
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