External Masonry Repair

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Covering electric applications

What do we need?

In restorations, there is often the need of moving an existing electrical socket or creating new electric or hydraulic supply. In these cases you should apply the following method for restoring the wall.

How do we do it?

The repair of masonry  is necessary by using specialized materials that provide a permanent long-term solution.

ADVANTAGES: Easy in Application – Durable solution

Products used

WRM 518
WRM 483 CEM COAT FINE
GLX 292 FLEX PRIM
STATUS ECO

Step by step

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STEP 1: Clean thoroughly the surface of application from dust and loose particles, irregularities, etc. Then, spray water on the surface

STEP 2: Filling of gap should be done with fast setting repairing product WRM 518 (R2)

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STEP 3: Before WRM 518 starts getting dry, engrave it diagonally for increased bonding and easier application

STEP 4: Apply WRM 483 CEM COAT FINE, an extra-fine cementitious putty

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STEP 5: Leveling of surface with a spatula, removing the material in excess

STEP 6: Leave WRM 483 CEM COAT FINE to get dried and rub with a wet sponged trowel for making the surface smoother

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STEP 7: prime the surface with GLX 292 penetration primer

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STEP 8: Apply STATUS ECO, ecological emulsion paint, in two coats

STATUS ECO is a premium quality ecological emulsion paint. It is odourless, easily cleaned and sustains frequent
washing and little scratches.

Products used : Repairing mortars Paints

Crumbled and detached plaster repairing

What do we need?

Due to aging, parts of plaster become loose and finally detach.

How do we do it?

The repair of detached and crumbled plaster is necessary by using specialized materials that provide a permanent long-term solution.

ADVANTAGES: Repairing and on the same time Permanent Protection against Moisture

Products used

GLX 292 FLEX PRIM
WRM 520
WRM 483 CEM COAT
STATUS ALL WEATHER

Step by step

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STEP 1: Remove crumbled plaster with a spatula and clean thoroughly the surface from dust

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STEP 2: Prime the surface with the deep penetration primer GLX 292 FLEX PRIM

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STEP 3: Apply fast setting WRM 520 on the surface of application. Wait 20 minutes to get dried.

STEP 4: Apply WRM 483 CEM COAT which is a cementitious putty

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STEP 5: Once WRM 483 CEM COAT has dried, proceed to rubbing of surface

STEP 6: Apply deep penetration primer, GLX 292 FLEX PRIM

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STEP 7: Paint the surface with STATUS ALL WEATHER in two layers

STATUS ALL WEATHER is a pioneering product that dyes and isolates the exterior walls at the same time, ensuring absolute protection from the humidity and exceptional endurance.

Products used : Repairing mortars Paints

Crack on masonry repairing (when masonry in contact with bearing structure) – Cracks <1cm

What do we need?

Cracks <1cm often appear in masonry filling are a danger to their statics

How do we do it?

The repair of the cracks of the walls is necessary by using specialized materials that provide a permanent long-term solution.

ADVANTAGES: Easy in Application – Permanent Protection against Moisture

Products used

  • THC 410C
  • WRM 520
  • WRM 550
  • Fiberglass for wall reinforcement (223gr/m2)
  • STATUS DUR
  • STATUS All Weather

Step by step

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  1. Start by widening the crack by 15-20cm on each side
  2. Clean surface from dust and loose particles

katheresi sova-rogmi3. Spray the area of application with water to increase bonding.

When necessary, apply the system adhesive-mesh-adhesive by using THC 410C and THRAKON repairing fiberglass mesh (223g/m2). Please contact our Technical Department.

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4. Apply the fast setting (20’) repairing product WRM 520, which offers high strength (R3).

5. Apply the fi rst layer of the fast setting reparing plaster WRM 550. Before the plasters gets dried, reinforce it by pressing THRAKON’s repairing fi breglass mesh (223 g/m2).

6. When the fi rst layer of WRM 550 is dried, apply another layer of WRM 550, on top of the fi berglass mesh, in order to level the area.

7. When WRM 550 has dried, smoothen it with a sponge trowel.

8. Prime the surface with STATUS DUR, solvent based primer.

9. Apply STATUS ALL WEATHER in two layers.

Products used : Tile Adhesives & Grouts Repairing mortars ETICS & Facade Products Paints

Detached Masonry

What do we need?

The subsidence and earthquakes often result in disconnection of masonry from the supporting structure as a result there is a serious risk to their static and safety of residents.

How do we do it?

The repair of detached masonry is necessary by using specialized materials that provide a permanent long-term solution.

Products used

THC 410C

WRM 520

WRM 550

Fiberglass for wall reinforcement

Step by step

  • Signs that the masonry is disconnected from the supporting structure launched plaster 15-20cm on each side and is opening decoupling with a sharp tool (V shape).
  • Clean surface from dust and loose particles. Spray the area of the application and apply fast setting repairing mortar WRM 520.
  • After 20-30 min apply the system adhesive-mesh-adhesive by using THC 410C and THRAKON repairing fiberglass mesh (223g/m2).
  • Next day is the restoration of crumbled and detached plaster with fast setting repairing plaster WRM 550.

Products used : Repairing mortars Tile Adhesives & Grouts

Cracks > 1cm

What do we need?

Cracks  >1cm often appear in masonry filling are a danger to their statics.

How do we do it?

The repair of the cracks of the walls is necessary by using specialized materials that provide a permanent long-term solution.

Products used

WRM 520

WRM 550

Fiberglass for wall reinforcement (223g/m2)

Step by step

  • Start by widening the crack by 15-20cm on each side and the opening decoupling with a sharp tool (V shape).
  • Clean surface from dust and loose particles. Spray the area of the application and apply fast setting repairing mortar WRM 520.
  • After 20-30 min is the restoration of crumbled and detached plaster with fast setting repair plaster WRM 550, arming the application thickness using THRAKON repairing fibreglass mesh (223g/m2). The fiberglass gets 2/3 of the total thickness of the repair plaster WRM 550.
  • Next day is the restoration of crumbled and detached plaster with fast setting repairing plaster WRM 550.

Products used : Repairing mortars

Corroded Steel Repairing

What do we need?

Problems on plasters, could create big problems, through time, with moisture playing a major role in this. Problems could affect reinforcement, with moisture attacking steel and causing corrosion.

The phenomenon of carburization (conversion of calcium hydroxide Ca (OH) 2 contained in the concrete to calcium carbonate CaCO3), and the high concentration of chlorides in strongly corrosive environments such as in industrial, urban, coastal areas, etc. lowers the alkalinity concrete that protects the iron armor. The result of this reduction is the corrosion, ie rusting of steel reinforcement of concrete and the cracks due to an increase in the volume of reinforcement, which create risks for the statics of the structure construction.

How do we do it?

The coating of steel reinforcement with anticorrosive brushable mortar WRM 510 shields the armor from the negative effects of carbonation (rust) and chlorides, increasing the life of reinforced concrete and protecting the statics of the building. Then, repair the concrete with WRM 525, a high strength, fiber reinforced repairing mortar (R4).

ADVANTAGES: Easy in Application – Very High Mechanical Strength

Products used

WRM 510

WRM 525

Step by step

  1. Remove the worn parts of the concrete until you reach healthy substrate. Fully uncover the metal reinforcement at the points will be repaired so that it is possible to coat with the primer WRM 510.
  2. Then clean the reinforcement from rust using a wire brush, shipping hammer, blasting or needle guns, according to the size and extent of corrosion. Smooth concrete surfaces should be roughened enough with a chisel before the application of repair materials.
  3. Finally wash and clean the surfaces (reinforcement and concrete) with water under pressure. The surfaces of concrete on which to apply the product WRM 510 must be wet until saturation and the excess water is removed.
  4. Apply on metal reinforcement as well to all surfaces of the uncovered concrete anticorrosive brushable mortar WRM 510.
  5. When primer for steel reinforcement cured, but while it is still fresh, apply the repair mortar WRM 525 to close the gaps in the concrete created.
  6. Where necessary molding to restore part of the concrete and then inject repair mortar WRM 525 taking care to make diligent laying and cover all the gaps. Be sure to get out all the produced air and there are no gaps. The screed thickness may be up to 4 cm. The repair mortar should be applied with diligence and pressed firmly to cover all the gaps of the depth to the outer surface. With extreme care should cover the metal reinforcement.
  7. When we closed the gap, smoothing the outer surface or roughened if you will be apply plaster.

To obtain uniform strength and prevent cracks, the final surface must be kept moist for the first few days after application, and prevent fast drying with suitable liquid cover. Particular care should be taken during the summer months and on surfaces that are under strong sunlight. The material must be applied when the external temperature is between + 5oC and + 35oC, and not in the rain.

Tip: For structuring corners, either use a corner-shaped spatula, or two spatulas together. WRM 525 offers excellent bonding strength making it easy to structure a corner.

WRM 525 is a premium quality repairing product, fiber reinforced, offering high strength (R4), making it appropriate for repairing old or new, reinforced or not concrete. It is suitable for the restoration of damages on concrete. It can be applied either by pouring it with a trowel/spatula or by spraying it on the surface to be repaired. It is non-shrinking, with excellent bonding with concrete, while it develops rapidly its mechanical properties.

Products used : Repairing mortars

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