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・ External Short Messaging Entity
・ External sorting
・ External spermatic fascia
・ External sphincter muscle of female urethra
・ External sphincter muscle of male urethra
・ External sphincter muscle of urethra
・ External storage
・ External stowage platform
・ External transcribed spacer
・ External urine collection device
・ External validity
・ External variable
・ External ventricular drain
・ External vertebral venous plexuses
・ External Vision System
External wall insulation
・ External water spray system
・ Externalism
・ Externalities of automobiles
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External wall insulation : ウィキペディア英語版
External wall insulation

An external wall insulation system (or EWIS) is a thermally insulated, protective, decorative exterior cladding procedure involving the use of expanded polystyrene, mineral wool, polyurethane foam or phenolic foam, topped off with a reinforced cement based, mineral or synthetic finish and plaster.
The thickness of thermal insulation is dependent on whatever type is required in order to create a partition with a heat transmission factor of U=0.25-0.3 W/m2K. When calculating the actual insulation requirements, consideration must be given to current Building Regulation standards. Consideration must also be given to exposure and durability, and whether the structure might be subjected to vandalism etc. In many older properties, special attention is required for concrete beams or lintels which act as thermal bridges providing poor insulation.
==Types==

External wall insulation systems generally comprise firstly an insulation layer (an element which helps to achieve the requisite thermal performance); and secondly,a protected weatherproof finish (usually a render, although brick slips, tiles, and decorative boards can also be used). Insulating render can also be an advantage in certain locations. Choice of types and sizes will depend on the substrate and design exposure requirements.
Dry finishes are usually fixed to the substrate by means of timber battens independently fixed to the substrate.
Any system selected and installed, should be certified by a notified body.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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