Basement Sealing and Drainage - Checklist
A damp basement harms every house. A suitable seal in combination with drainage will prevent moisture damage.
Causes of damp basements
Sealing and drainage are of no use if the cause of the moisture is inside the house. Often it is thermal bridges that lead to condensation and are responsible for wet walls. Leaky pipes are also possible. If the house is in the water, it is not enough to seal the masonry. An often underestimated cause are salt deposits in the basement wall. Salt absorbs water, the wall removes moisture from the air. The only remedy is desalting. Before the renovation, these questions have to be answered:
- Is the wall more humid in summer than in winter? - It's condensation.
- Misting items from the basement outdoors? - This is a sign of condensation.
- Are only some spots wet near lines? - Probably a water pipe is leaking.
- Does the wall show white coverings? - It's salty.
- Are some areas wet, you can not see a connection with lines? - This is a typical sign of saline walls.
- Does wetness increase or shortly after a downpour? - drainage and sealing are required.
- Are the walls light but evenly damp? - A seal is usually sufficient.
- Is the floor around the house wet? - Probably the foundation is in the water, drainage by a specialist is required.
Create drainage ditch to determine the load case
If the moisture in the basement is not caused by leaky pipes, condensation or salt, a specialist must be the load case determine. This is how professionals describe the way the water affects the walls. Press only soil moisture on the masonry, a seal is sufficient. Non-damming leachate, ie fast seeping surface water, requires drainage. A high groundwater level or damming water makes a complex sealing necessary by the skilled person. Digging around the house is helpful in determining the load case. He is also the first step to create a drainage. Trench Dig Checklist:
- Plan Trench Depth. (Bottom edge of foundation or up to 30 centimeters lower.)
- Stake trench width of 80 centimeters.
- Mark the area for the angle of repose.
- Dig trench and create embankment of 30 °.
- Have the expert examine the masonry.
Tools and Material Required
Shovels are enough to dig the trench Not. A mini excavator is needed. The following should also be present:
- Wire brush, hammer and chisel to clean the masonry.
- Putty and putty to fill in cracks and holes
- Tassel to paint sealant.
- Rubber mortar to form a groove (which prevents water from penetrating between foundation and wall).
- Nubbins or insulation boards for the earth contacting area (perimeter plates) to protect the foundation from mechanical damage
- Obtain drainage pipes with maintenance shafts, filter fleece and gravel to fill the trench in sufficient quantities.
Sealing of masonry
Sealing is carried out according to the requirements of the specialist. The builders themselves can carry out the required work.
- Remove old insulating materials, loose plaster and paint from the foundation.
- Fill cracks and holes.
- Let walls dry.
- Transition of wall and foundation with a groove .
- Brush foundation with bitumen primer thinly (up to 15 centimeters above floor level).
- Coat painted area twice, with non-accumulating bituminous leachate.
- Install mechanical protection.
- Lay drainage pipes with slope to channel and with fleece
- Apply maintenance shafts to masonry corners.
- Fill trenches with gravel.
Expert advice is always required
Sealing and draining is a job that home improvement can do. A specialist must decide on the type and extent of the work.
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