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Granite is porous, but not permeable. In other words, granite does not let rain water pass through it. The leak is probably occurring in the mortared joint between the lintel and the brick or stone that is adjacent to it, leaking at the joint between the window frame and the lintel, or is getting behind the brick or stone facing at some point above the window through an opening, crack, or window above the lintel. It's even possible that water is penetrating somewhere on the roof, entering the wall, and then being blocked by the window. All of the above have been known to cause leaks at window openings.

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Q: You have granite lintels that are leaking rain water your builder says its because they are porous?
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What is double top plate?

Bearing walls use the double top plates to transfer loads from joists above through the wall studs, through the sole plates, through the floor system to the beams, columns, foundations and footings. Joints in top plates have to be located over the studs. The top and bottom double plate should not both have joints over the same stud. Joints in the top plates should be offset by at least one stud.Holes or notches in top plates of bearing walls must have 2 inches of material intact, or the top plate should be reinforced with wood or metal.If the floor or roof joists resting on the stud wall have the joists line up directly over or within 2 inches of the studs, a double top plate is not required, since there will be no load on the plate other than at the tops of studs. As a practical matter, this is rarely done, since it requires considerable care and layout. There is often a reason to move a joist one way or another slightly, and the double top plate provides the flexibility to do that.If single top plates are used, the builder didn't use the double overlap method to lock wall corners and T intersections together. In this case, metal ties are used to secure the walls together. Metal ties are also used where lintels extend up flush with the top plate. This interrupts the continuity of the plate, and metal ties join each end of the lintel to the adjacent plate.While we don't need double top plates on partition walls, these are common for a couple of reasons:Partition walls can be secured to and brace loadbearing walls by overlapping the double top bearing plates, locking the walls together.It is easier to cut all studs the same length to end up with an 8 foot high wall rather than to cut studs 1 1/2 inches shorter for bearing walls than for partition walls. It's faster and cheaper to build everything the same way.Openings in bearing walls require lintels (horizontal beams) to carry the loads around the openings. Openings in partition walls do not need lintels.


Related questions

Why do Moroccans eat lentils?

Surprising as it may seem, Moroccans do not eat lintels, nor do they eat the doors whose frames the lintels support. Moroccans, like most humans, find wood and stone inedible and therefore do not try to consume them. If you meant "lentils" instead of "lintels", then the reason why Moroccans eat lentils is because of the protein value and relative inexpensiveness as compared with meat.


What is a common use of level beams?

Lintels


The lintels of Stonehenge are secured by?

Mortise and tenon joint. Gravity


Are weep holes required at lintels in brick masonry wall?

drainage


How do you sort out missing lintels I'm buying a house whereby the homebuyer report states that lintels are missing above the upvc windows How bad is this?

Not sure what a "upvc" is... If the window is arched, you do not need a lentil. If the soffit is right above the window you do not need a lentil. Hope this helps.


The builders of Stonehenge used a principle of construction called?

They used mortise and tenons to locate the lintels on the trilithons.


How do you calculate the size of the lintels?

I Need the size of a lintle 3.8m long in a bungalow with an all hipped roof.


What type of lintels are suitable for use when building an outhouse?

If you are wanting to use lintels when building your outhouse the choices are endless depending on how you want to design the outhouse. If you want it simple then stone would be appropriate but if you want something more attractive then old stone or brickwork would be nice.


How can one best describe Lintel?

A Lintel is a decorative architectural piece that is often put over portals with no structures. Lintels have been made in many different styles because of the various cultures in place around the world.


Are beans lintels?

Lentils are beans. Bean is the larger category; lentil is a sub-category. So some beans are lentils.


What does renaissance architecture look like?

Renaissance architecture can be noticed because of its orderly arrangement of pilasters, columns, and lintels. It also includes the use of hemispherical domes and semicircular arches. It emphasized symmetry, geometry, proportion, and the regularity of parts.


What are the difference between lintels and beams?

A lintel is over a window or door and a beam is usually under the structure of the building, either the roof or the floor.