Brick weep holes are a critical component of any brick home and are incredibly important to maintaining its structural integrity and health. If you're a homeowner who's never heard of brick weeps before, or you're not sure about what exactly they do, read on for a detailed guide about them and their importance.
If your building does not have flashing to protect against water, or weep holes to let it escape, its susceptible to water damage and possibly mold.
Weepholes shall be provided in the outside wythe of masonry walls at a maximum spacing of 33 inches (838 mm) on center. Weepholes shall be not less than 3/16 inch (5 mm) in diameter. Weepholes shall be located immediately above the flashing.
Yes, Australian building codes mandate weep holes in masonry to ensure proper drainage and ventilation, safeguarding structural integrity and preventing moisture-related issues in buildings.
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.
Blocking your window weep holes predisposes the window structure to water damage, rust, and corrosion ultimately reducing your window's lifespan.
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.
Therefore, weep holes are at the bottom of brick veneer, just above the top of the foundation, and directly above the termination point of any flashing installed behind the brick. Weep holes also should be located above doors, above and below windows, and above any other openings in the brick wall.
Functionality: Whether tile insert drains contain weep holes depends on the specific design and intended use.
It is difficult to add weep holes after the walls are constructed. If the weep holes are drilled, they will typically puncture the flashing. This is true even if a special guide is placed on the drill. If the hole does not go all the way through the mortar then it will be ineffective.
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.
Weep hole drainage is essential for the healthy functioning of masonry wall systems in your home. Without it, water can accumulate within a cavity wall and create damage that can be both costly to repair and dangerous to the health of the home's inhabitants.
Why are there no weep holes? The reasons vary, but the house's builder forgot to include them, or the homeowners didn't want them. Sometimes homeowners don't want weep holes because they retract from the house's appeal – think smoothly rendered brick houses.
Weep holes are often located at the bottom of brick exterior walls. They look like vertical gaps in the mortar joints between bricks. Because brick masonry is porous, water may penetrate the surface and get behind the wall.
It's obvious that small pests such as cockroaches and spiders can crawl through weep holes, but vertebrate pests such as lizards, snakes and even mice can also squeeze through a normal weep hole.
(2) Weepholes are not required in the following locations: Where head openings are less than 1.2 m wide. Beneath window and door sills.
Brick weep holes are a critical component of any brick home and are incredibly important to maintaining its structural integrity and health. If you're a homeowner who's never heard of brick weeps before, or you're not sure about what exactly they do, read on for a detailed guide about them and their importance.
Do I Need To Plug Weep Holes During a Flood? No. Unless your home is a submarine the exterior materials along with doors and windows are not watertight and will succumb to the flood waters.
Sealing window weep holes can cause excessive condensation and water build-up leading to rotting of the window sill and frame. Sealing retaining wall weep holes can cause stability issues for the wall as any water behind the wall cannot escape which in turn increases hydrostatic pressure on the structure.
Weep holes are used in the figure to relieve the pressure caused by the water, which is eliminated by the holes. A significant factor is the placement of the holes' height. The more the weep hole rises, the more pressure the water puts on the building.
The Weep Vent should be spaced at no greater than 900mm centres to meet N.H.B.C guidelines, which state, “weep holes are recommended to be sited at every 450mm maximum with at least two per opening above all windows and doors.”
Weepholes to cavity walls should be provided:
to cavity trays above openings and penetrations through the wall (such as sub-floor vents, ducts or flues), at least two per opening at not more than 450mm centres. at least one to the bottom tray in a series of stepped cavity trays, eg at pitched roof abutments.
These CMU blocks, also known as cinder or concrete blocks, are often used in conjunction with french drain installations and hollow block masonry walls. If this is the case for your basement, weep holes may need to be inserted into the basement walls to allow drainage to occur.
This research demonstrated that even under truly extraordinary conditions water rarely enters the weephole and even if it does it cannot be blown high enough up in the cavity to create internal damp problems. To understand why, it's important to look at the details of a correctly constructed cavity wall.