What is an interior weeping tile system? The Steps Involved in Installing an Interior Weeping Tile System How water enters and pools within a concrete block wall Illustrated steps involved in installing an interior weeping tile system
What is an interior weeping tile system?
An interior weeping tile system, also referred to as an internal perimeter drain system, is the alternative to traditional foundation excavation and waterproofing for a concrete block foundation.
Compared to exterior waterproofing, an interior weeping tile system is much less expensive (since no excavation is involved) and is a proven, highly effective basement waterproofing method. Interior perimeter drainage systems are used mainly for waterproofing concrete block / cinder block foundation walls. This waterproofing system is so reliable that some very large companies sell this type of system for dealing with virtually all foundation waterproofing problems.
Interested in information about conventional exterior weeping tile installation? Click to read about weeping tile systems.
A perimeter drainage system keeps a basement dry by providing drainage for water that flows into and pools within concrete block / cinder block foundation walls. This system is also very effective for dealing with a high water table under the basement floor slab, and for any water that leaks through foundation cracks. The interior weeping tile system is a basement waterproofing system that will keep your basement perfectly dry, and is in many ways similar to the weeping tile system that is installed along the footing on the exterior, at the base of your foundation.
| An interior weeping tile system is installed next to the footing
This basement waterproofing system involves installing a drainage system on the perimeter of the inside of the basement, beneath the basement floor, therefore, no digging outside the home is required. An installed interior perimeter weeping tile system drains water at the footing of the foundation in much the same way as exterior weeping tile. An interior weeping tile system allows water, which has pooled in a concrete block / cinder block foundation, to drain, thus preventing water from leaking or seeping from the concrete blocks onto, or beneath, the basement floor. By draining the cinderblocks and evacuating the ground water, the interior weeping tile system helps to extend the useful life of the concrete block foundation which does deteriorate over time due to the saturation of the blocks from pooled water within them. Properly installed, an interior weeping tile system will keep your basement dry for the life of your home.
If you want to know if this waterproofing is economical, be sure to read our blog post: Internal Waterproofing - The Least Expensive Way to Waterproof
Steps Involved in Installing an Interior Weeping Tile System
Installation of this perimeter drainage system requires access to bare basement walls inside the home. In finished basements, the lower part or entire stud walls are removed.
Here are the installation steps:
1. The basement floor slab, next to the foundation walls is jackhammered open in order to expose the footing and to excavate a trench for the installation of drain pipe / drain tile;
2. The fully exposed bottom course of concrete blocks have weeping holes drilled into the hollow cavities within the blocks;
3. A perforated drain pipe is installed next to the footing;
4. An air gap membrane is installed along the wall;
5. In the absence of a suitable sump pump liner, a sump liner and submersible sump pump are installed beneath the floor, with the liner cover installed flush with the floor;
6. The drain pipe is routed to the sump liner, beneath the basement floor so that the water collected from the draining concrete / cinder blocks can be mechanically evacuated to the exterior by the sump pump. Note: it is illegal in most municipalities in the GTA to dispose of this water by connecting to the floor drain; and
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7. The drain pipe and lower portion of the drainage membrane are positioned and new concrete is poured over top and levelled. On completion, all that is visible is a scar in the floor along the wall, a membrane fastened to the wall, and a sump pump discharge pipe to the exterior.
| Concrete repair of trenching along the foundation wall
|| Sump pump discharge pipe installation
|| Finished look of the system