In order to avoid moisture damage, stairs outdoors need careful waterproofing. Since there are tensions in the staircase material due to large temperature differences and other weather conditions, the stair seal should be particularly resistant and flexible. This is the only way for this measure to develop its full protective effect.
Which areas of the stairs need to be sealed?
All joints on an external staircase require a thorough seal. These are mainly located in the side connection area to the wall or the stair string, but also between the individual steps.
- Also read - Put stairs in the outdoor area - this is how it works
- Also read - Make the stairs appealing
- Also read - Advantages of a steel structure for the stairs
What do I use to seal my stairs?
Only use material specially developed for this purpose to seal your stairs. Special silicone for outdoor use is resistant to UV radiation, fungus-inhibiting and weather-resistant. It also has a sufficiently high degree of flexibility.
How to seal your stairs
To properly seal your staircase, first remove any old sealant, if any. Use a joint scraper (€ 7.49 at Amazon *), a cutter knife (€ 15.00 at Amazon *) and silicone remover or - quite simply - baby oil.
Then thoroughly clean the entire surface again, making sure that neither silicone nor oil remains on the surface to be sealed. Now you can start the actual sealing:
- Prime absorbent concrete or stone with a deep primer
- possibly glue painter's tape on both sides of the joint
- Cut the nozzle of the silicone cartridge at an angle
- Fill silicone into the joint using the spray gun
- Let the cartridge slide gently along the joint
- Smooth out the silicone directly afterwards with a small spoon or ice cream stick
- Water with a little washing-up liquid helps smooth the surface: just dip the spoon briefly beforehand
- Immediately afterwards, peel off the painter's tape at an inclined angle.
After the stairs have been sealed, it takes about 48 hours for the silicone to harden completely. Do not touch it during this time! The material usually becomes rainproof earlier, usually one day's drying time is sufficient.
In order to protect the entire staircase against the effects of the weather, the surface can now be sealed. So your staircase will probably withstand many decades in the outdoor area.Tips & Tricks It is best to first fill larger joints with a prefabricated joint profile, then apply the silicone. In this way, even wide joints can be neatly arranged.