Urethane | ADDTAPSHEET |
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Weak resistance to moisture As it is directly adhered to building surface, swelling (air-pocket) can be made under membrane of urethane due to its non-air-permeability. Though dewatering tool is equipped, its effect is slight. |
ADDTAPSHEET is sheet-type waterproofing materials and also dry work method which is not affected by humidity. Therefore, dry process of working place is not necessary. |
Difficulty in forming equal waterproof membrane Urethane, liquid material, is forced to flow down along slope and harden. Thus, steep slope makes it impossible to form even thickness of waterproof membrane. |
ADDTAPSHEET is produced by precision machine at plant and applied at site, which guarantees that its waterproofing layers have even thickness and durability unlike urethane. |
Removing existing materials attached to the surface of building and Drying the surface Removing remained materials, inevitable work, causes cost rise, dust, noise, etc. To minimize separation between membrane and surface, drying the surface is the most important. Temperature of the surface should be less than ℃-5, which needs 15~20 day drying period under Korean weather. However, it is impossible to carry out this work under Korean working conditions. |
ADDTAPSHEET doesn’t require removing the structures of building or existing layers, and only requires getting rid of tiny uneven materials which can damage the sheet. Thus, you can save lots of removal cost. Moreover, ADDTAPSHEET doesn’t make any dust at site, and thus doesn’t do any harm to surroundings. |
Difficult Repair For precision repair, after V-cutting of fractured layer, low part, middle part and upper part of the layer should be sequently repaired. Repair of each part takes at least one day; totally at least 3 days. |
Repairing work of ADDTAPSHEET is simple and easy. As of repair work, the same sheet as the fractured one would be attached on the faulted part by welding machine. In this way, clients can save repair cost and time and acquire good looks of the repaired. |
Uncertainty in guarantee against defaults Its easy constructing way lets lots of unqualified constructors participate in this work. As a result, severe price competitions among participants can make them not do precision construction and also avoid warranty responsibility for the faults. |
ADDTAPSHEET provides clients with total services from the production to installation of the sheet on the basis of the technology accumulated so far. |
Flammable Materials Urethane, volatile liquid, is so easy to catch fire and smelly that work-sites can become very risky and poor place to work. (Recent fire accident in Pyoungtaek, where 7 people were dead, was caused by thinner of flammable material.) |
Though directly exposed to fire, ADDTAPSHEET does not catch fire because of its self-extinguishability. Additionally, as there is no bad smell in site, safe and pleasant work can be executed. |
Unmeasurable Construction Material It is very hard to measure the thickness of the membrane and it is possible for constructors to control the quantity of the material, which makes it very difficult for ordering contractor to check whether contracted quantity is consumed or not. |
Since ADDTAPSHEET of roll-type sheet is not liquid-type product, ordering contractor can easily check whether the contracted quantity is consumed or not with the naked eye. |
Urethane | ADDTAPSHEET | |
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Removing and Drying the surface | Necessary | Unnecessary |
Work Schedule related to Weather Condition | Sensitive | Work is possible right after rain |
Fire Hazard (at construction) | High | None |
Risk of Suffocation by Gas | High in poor ventilation condition | None |
Resistance to ultraviolet light | Strong(only when regularly applying coating material) | Strong (UV coating) |
Insulation Performance | Low | High |
Expected Lifespan | 3~5 years | 10~20 years |
Stretch Rate | Good | Twice better than Urethane |
Self-extinguishability | Good | Good |
Surface Strength | Weak | Stronger than Urethane |
Response to Building Movement | Very Weak | Very Strong |
Separation between membrane and surface | Generally Weak | Single Layer |
Detecting Faults | Difficult to find faults due to the jointless | Easy to find defaults by checking connected parts |
Checking Volume of Construction | Difficult to check volume of coating membrane | Easy to check volume of consumed sheet |
Difficulty Level of Construction | Low | High |
Appearance | Good | Not better than Coating membrane |
Connecting Work | None | Connecting two sheets with hot air welding of 600℃ |
Maintenance | Difficult because of 3-step repairs | Easy and Simple Repair with attaching new sheet to faulted part |
Multi-Waterproofing | ADDTAPSHEET | |
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Removing and Drying the surface | Necessary | Unnecessary |
Work Schedule related to Weather Condition | Sensitive | Work is possible right after rain |
Fire Hazard(at construction) | High due to using thinner & torch | None |
Risk of Suffocation by Gas | High in poor ventilation condition | None |
Resistance to ultraviolet light | Strong(only when regularly applying coating material) | Strong(UV Coating) |
Insulation Performance | Low | High |
Expected Lifespan | 3~5 years in case of urethane coating | 10~20 years |
Stretch Rate | Good | Twice better than Urethane |
Self-extinguishability | Good | Good |
Surface Strength | Weak | Stronger than Urethane |
Response to Building Movement | Weak (Asphalt) | Very Strong |
Separation between membrane and surface | Generally Weak | Single Layer |
Detecting Leakage | Difficult to find leakage due to the jointless | Easy to find defaults by checking connected parts |
Checking Volume of Construction | Difficult to check volume of coating membrane | Easy to check volume of consumed sheet |
Difficulty Level of Construction | Low | High |
Appearance | Good | Worse than Coating membrane |
Connecting Work | Weak, Hand Torch(Asphalt), Tape(Metal Sheet) | Connecting two sheets with hot air welding of 600℃ |
Maintenance | Difficulty due to Multi-layers | Easy and Simple Repair with attaching new sheet to faulted part |
Asphalt Sheet | ADDTAPSHEET |
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High risk of fire at working site.Superintendence observation is necessary during working when using gas barrel and torch | ADDTAPSHEET is a safe working way as it uses hot-heat wind to weld the sheets; not direct contacting to heat. |
Necessity of removing existing layers from and drying the surface. As it is a adhesive method, it is indispensable to remove layers attached to the surface and dry the surface, which creates cost rise, dust and noise. |
ADDTAPSHEET is a dry construction and doesn’t need removal and drying. |
Weak to Solar Heat. When heated in summer, asphalt surface becomes sticky breaking away from underlying layer. Swelling part makes membrane easily rupture. |
ADDTAPSHEET is a dry working method in which swelling doesn't happen. In addition, it is strong to exposure environment such as solar heat with UV coating. |
Weak to Building Movement This sheet is weak to the place where strong movement occurs such as extension joint due to its low stretch rate. |
ADDTAPSHEET can be applied to strongly moving place such as extension joint. In addition, its high stretch rate makes this sheet do its function well even in the place where strong movement is made such as factory. |
Weakness of connected part Connected parts can be easily detached due to incomplete work. |
ADDTAPSHEET creates strong joint by means of welding machine which generates consistent pressure and heat. |
Asphalt Sheet | ADDTAPSHEET | |
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Removing and Drying the surface | Necessary | Unnecessary |
Work Schedule related to Weather Condition | Sensitive | Work is possible right after rain |
Fire Hazard(at working) | High(Multi Asphalt) | None |
Resistance to solar heat | Strong(only when regularly applying coating material) | Strong(UV Coating) |
Insulation Performance | Low | High |
Expected Lifespan | 5 years with urethane coating | 10~20 years |
Stretch Rate | Good | 2.5 times more than Urethane |
Surface Strength | only sheet is weak | Stronger than Urethane |
Response to Building Movement | Weak | Very Strong |
Difficulty Level of Construction | Higher than coating material | High |
Connecting Work | Hand Torch | Connecting two sheets with hot air welding of 600℃ |
Maintenance | Somewhat Difficult | Easy and simple repair with attaching new sheet to faulted part. |