Just like varnished wooden stairs. For greater safety one can apply non-slippery preparation or special nonslippery (rubber) strips. There is also a possibility of milling the strips in the material.
Yes, of course. It is probably the most durable material on the market but there are some conditions. First of all it must be granite. The most proper one would be sandblasted, flamed or grained. If our customer prefers polished one, we offer to flame or mill non-slippery strips to ensure safety in case of rain or snow.
It depends, but they are not usually installed if the sill is supported against the wall from the three sides.
One should use water with some soft detergents. From time to time, special cleansers should be used in order to renew the color, polishing etc.
In our company we suggest sills 3 centimeters thick. Especially with long sills the thickness of 3 centimeters looks better and it is more resistant. One can choose the thickness of 2 centimeters with short sills to make them look light.
It can be safely said it is the best solution. The stone gets warm quickly and it keeps warm for a long time. However, it must be remembered that a special kind of glue for heated floors must be applied.
Yes, but special kind of tails is necessary. However, the joining will be visible, not much but visible.
Usually it is installation foam, glue (Ceresit type), white for marble sills or grey for granite or dark marble sills.
Polished granite is very resistant stone, much more resistant than marble. In the past it was used for building exteriors, walls or floors in busy places. Granite is resistant to low as well as high temperatures, in 95-98% it is also resistant to stains and changes in color (it is additionally impregnated with silicone which guarantees its permanent beauty).
Most colors never change under moisture, others may slightly change its color after some time, for example if we leave a puddle of water for 30 minutes, and some colors may be darker. Our granite is impregnated at the producer, although some customers prefer to have it impregnated after the installation (products available at shops selling tiles and stone accessories).