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Waterproofing an existing basement begins with excavating to the bottom sides of the footings. Once excavated, the walls are then power washed and allowed to dry. The dry walls are sealed with a waterproofing membrane, [3] and new drainage tiles (weeping tiles) are placed at the side of the footing.
Several layers are used for waterproofing in earth shelter construction. The first layer is meant to seal any cracks or pores in the structural materials, also working as an adhesive for the waterproof membrane. The membrane layer is often a thick flexible polyethylene sheeting called EPDM rubber. EPDM is the material usually used in a water ...
As liners for vertical walls: single or double with leak detection; As cutoffs within zoned earth dams for seepage control; As linings for emergency spillways; As waterproofing liners within tunnels and pipelines; As waterproof facing of earth and rockfill dams; As waterproof facing for roller compacted concrete dams
Applications of this function are in mechanically stabilized and retained earth walls and steep soil slopes; they can be combined with masonry facings to create vertical retaining walls. Also involved is the application of basal reinforcement over soft soils and over deep foundations for embankments and heavy surface loadings.
Damp proofing is another aspect of waterproofing. Masonry walls are built with a damp-proof course to prevent rising damp, and the concrete in foundations needs to be damp-proofed or waterproofed with a liquid coating, basement waterproofing membrane (even under the concrete slab floor where polyethylene sheeting is commonly used), or an ...
An exterior drain also allows for the installation of a waterproof membrane to the foundation walls. The waterproofing system can be applied to the inside or the outside walls of a basement. [17] When waterproofing existing basements it is much cheaper to waterproof the basement on the inside. Waterproofing on the outside requires the expense ...
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