What Is Mansard Roof Framing?
What Is Mansard Roof Framing?
A mansard roof framing is a type of roof framing that has four sides, with two slopes on each side. This roof style is not very common these days but can be found in historic buildings, such as the Palace of Versailles in France.
The mansard name comes from a 17th-century French architect Jacques-François Blondel who designed the roofs for some buildings with this style. It is not clear if he invented it or just popularized it.
Mansard roofs are also found on highrise buildings and hotels, as it is more common for a building to have one flat roof. A popular tall building in Chicago, the John Hancock Center has a steep mansard roof that clearly shows its beauty and engineering.
What Is The Mansard Roof Made Of?
Natural slate is an excellent choice for a mansard roof. This is due to the fact that it is easily adaptable to varied pitches by modifying the installation method and the overlap. In keeping with its ancient origins, the natural slate’s dark tone adds a sober and elegant touch.
It also blends with the brown tones found in abundance in old buildings, thus perfectly blending its old-style craft with modern architecture.
Natural slate can be found both naturally split and unsplit. The unsplit natural slate is denser and more resistant to impacts; it works well for mansard roofs in exposed locations such as the ones found in military installations, as it is particularly wind-resistant.
Natural slate’s fireproof quality makes it an ideal choice for hospitals, hotels, and other edifices of high value due to its high resistance to flame spread, allowing firefighters a greater margin of safety during a fire.
How Do You Do A Mansard Roof In Revit?
In Revit, you can access the roof by going to the Architecture tab from the ribbon menu at the top of your screen. From here, you can click on “Wall” and then click on “Roof.”
Make sure that you have a floor plan view open before doing this, or else it will be a bit difficult to do without a reference plan.
Once inside the Roof, there is a drop-down menu called Roof Type. There are several types of roofs; gable, hip, flat… and Mansard. The Mansard Roof is the third one from the bottom.
Click on the new roof button on the ribbon menu, then select an option for pitch, material, and profile.
You can also make your profile if you want to specify a different pitch for each section of your roof or if you want something different on each slope of your roof. Make sure to save it before going ahead with your new roof section. You can always go back and edit it later in case you don’t like what you did.
How Do You Ventilate A Mansard Roof?
The answer is to construct custom-made intake vents above the insulation level on the top roof. The vent must be arranged so the intake air may originate from a horizontal grill. Wind-driven rain or snow can enter the attic through any vertical intake type vent.
This can be achieved by establishing a horizontal grill from which the ventilation air can flow into the attic.
Outdoor air intake is necessary to avoid moisture that traps in the insulation. For example, if you use fiberglass insulation for your mansard roof and leave the doors off, condensation will form inside your attic.
This does not bode well for soundproofing or thermal comfort in the building during wintertime. Furthermore, condensation can also cause mold growth if there is insufficient ventilation in your attic.
To prevent this, you’ll need to install an outdoor air intake grill on top of your roof so that any moisture will go straight outside instead of collecting inside the walls and causing any damage to your roof sheathing (insulates).