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.
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.
Lintels
Mortise and tenon joint. Gravity
drainage
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.
They used mortise and tenons to locate the lintels on the trilithons.
I Need the size of a lintle 3.8m long in a bungalow with an all hipped roof.
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.
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.
Lentils are beans. Bean is the larger category; lentil is a sub-category. So some beans are lentils.
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.
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.