from web site
Flush door are excellent resistant against dust, heat and noise. It is a completely smooth door with plywood or Medium Density Fibreboard (MDF) fixed over a light timber frame and the hollow parts of its filled with a cardboard core material. Flush doors are simple interior and exterior doors that feature plain facings on both sides of the construction.
The flush door is mainly constructed by using two sections of plywood that are attached to each side of a frame. The interior of the door is hollow, that is been supported for making frame and majorly honeycomb support system is used. Good for exterior doors as they provide more insulation and strength.
Solid core flush doors are one of main type of flush door and it is very popular. Wood that is used in the solid core flush doors is mainly hard and mineral composition.
The width of this type of flush doors must be more than 7.5cm of stiles, top and bottom rails. Different combinations are used for the construction of solid core flush doors such as cross band, MDF, laminated core, particle board, face wood veneer, etc. Solid core flush doors are manufactured by using timber wood for framing and hard wood lipping is also necessary to provide for strength and durability. The wide of wood lipping should be equal to the thickness. To provide strength and durability hard wood lipping along with timber wood during frame work is done. These doors are strong and heavy so they mainly used as exterior doors and it also provide sound insulation.
As the name suggest Hollow core doors are hollow from inside with supporting system mainly honeycomb support system. Similar to solid core flush door, framing of stiles, top, bottom and intermediate rails should be more than 7.5cm in width. But by fixing wooden battens on the rails for filling space/gaps between stiles and rails.
In Hollow core flush door the thickness of plywood should be always more 6 mm. These doors are light in weight as compared to other types of flush doors but not as strong as solid core flush doors.
The cellular core flush door frames are constructed by fixing plywood battens and they are not less than 25 mm wide. In this type of doors the thickness of plywood must be always more than 3mm. Gluing, under pressure, plywood sheets and face veneers kept on both side faces of core is used to prepare shutter of this type of flush door.
ADVANTAGES OF USING FLUSH DOORS :
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