Though their functionality is the same, basement weeping tiles are installed close to the foundation to prevent water seepage by reducing the hydrostatic pressure. In contrast, the French drain tiles are fitted closer to the surface to drain water from low spots and prevent the soil's over-saturation.
As opposed to weeping tiles, which are supposed to be installed below the ground level and laid on a slope, French drains are installed on the ground level just below the surface. Their job is to redirect underground water to a septic tank or a drain area, keeping your property flood-free.
Weeping tile is prone to clogging over time, and may require expensive excavation to correct. French drains that become clogged may overflow without warning and cause damage, such as flooding in yards and basements. Existing structures may need to be removed if a French drain must be excavated.
The weep holes are to prevent the water from building up on the outside of the wall, when that happens it'll eventually wick through higher up or develop hydro-static pressure which can put quite a bit of force on the wall and lead to other problems, the holes just allow the water through easily which doesn't hurt the ...
A French drain (also known by other names including trench drain, blind drain, rubble drain, and rock drain) is a trench filled with gravel or rock, or both, with or without a perforated pipe that redirects surface water and groundwater away from an area.
Swales: A Natural Solution
They're a great option if you're looking for a more natural, eco-friendly alternative to French drains. A swale is typically lined with grass or vegetation that helps slow down and absorb water.
Clay soil has poor permeability, meaning it doesn't allow water to pass through easily. In such cases, the effectiveness of a French drain may be limited as the water may struggle to drain away from the area efficiently. French drains may not be suitable for areas with high water tables.
Without masonry weep holes, or if the existing drainage system is blocked or broken, capillary action can result in the water becoming trapped inside the cavity wall.
Pour and compact about 3 inches of gravel or landscaping stone along the bottom of the trench. This will act as bedding for the drainage piping.
Weep holes are usually located at the base of brick exterior walls. They appear to be vertical gaps in the mortar joints between the bricks. Water may seep through the surface and enter the wall's interior because brick masonry is porous.
Generally speaking, a French drain will last approximately 30 to 40 years. However, the above-mentioned factors may shorten its life cycle and it must then be replaced by a team of foundation experts.
With stormwater, most likely, your drainage systems would fall under land improvements. Stormwater best management practices such as french drains, downspouts and gutter systems, bioswales, and dry wells could qualify as depreciable assets.
A French drain needs to be surrounded by gravel in order to filter out silt and prevent clogging the drain pipe.
French drains are best suited for properties with moderate to severe water drainage issues, particularly in areas with heavy rain or poor soil drainage.
Interior French drains are meant for waterproofing the basement or draining your crawl space. They cost more because contractors must tear out the basement floor (most often made of concrete), install the drain, and then repair it.
A layer of free-draining material behind the wall serves as a conduit for water movement. Best practices include: Material choice: Clean, angular gravel or crushed stone (typically 20-40 mm or 3/4 to 1 1/2 inch) Layer thickness: Minimum one foot (~300 mm), increasing with wall height.
Installing a French drain costs $500 to $18,000, with a national average of $9,250. On average, you can expect to pay $10 to $100 per linear foot, or between $500 and $5,000 to have a 50-foot French drain installed.
If installing the drain involves diverting a stream or affecting a wetland, you likely need a permit to move forward. Generally, a small French drain on your property that doesn't change the flow of runoff entering and exiting your yard won't need a permit.
Problems With Weepholes
If weep holes are left unprotected in brick walls they provide access to the wall cavity for rodents and insects. Swarming bees and European Wasps love creating nests in cavities.
Even if you used the code as a basis of the requirement for weep holes, you would be surprised to learn that weep holes were nor mandated in the single family code until 1983 CABO, mandated by the 1985 Kentucky Building Code. Home inspectors are calling out missing weep holed on house built before 1985.
As an alternative to weep holes, most new construction will connect the drainage zone to a perforated drainage pipe located behind the base of the wall outfalling to a manhole.
An interior drainage system is an easier, more affordable option for waterproofing your basement. The WaterGuard Basement Waterproofing System is a non-clogging French drain alternative. Our interior drainage system captures water at the most common point of basement entry - the floor and the wall joint.
Clogging and Blockages
Clogging is one of the leading causes of French drain failure, often due to root intrusion or sediment build-up.
The optimally installed French drain does not necessarily need an end point. Ideally, as the excess water from one area runs down the drain, it will be distributed more evenly across your yard and absorbed.