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Figure 1 – Sky Venture Project, (UAE – Abu Dhabi)

At the present time, the competition between companies is stronger and extremely difficult! For those who are in the game becomes a challenge to find space for innovation and differentiation in a busy market rated by low prices or price orientated.

Obviously, the result of the above paradigm is standardization! Standardization on organizations, business models, industry, project, and products. Therefore if a client or a project requires a non-standard approach the current market provides limited solutions and always involving a big amount of time and money.

We believe that the breakthrough is grounded in knowledge, experience, and expertise, well known as, Consulting.

Taking the above as valid it is almost impossible to have a full domain of all the areas! It becomes essential to find highly skilled professionals consultancy in some specific areas.

On facade, weatherproofing thematic is crucial Consulting. Taking into consideration each project constraints it is always a set back to find the best facade solution for each project.

It is therefore essential to listen to the client needs and fully understand the requirement in detail. In this phase should be auscultated the below:

  • Project Technical requirements;
  • Materials involved and compatibilities between them;
  • Methodology – Method Statement;
  • Site conditions;
  • Project Schedule;
  • Client Goals;
  • Transportation.

To acquire all the information above it is therefore crucial to fully analyze all the inputs and how they interact with other variables and identify existing incompatibilities versus accurate or possible solutions.

The thorough job should be done with a conceptual/preliminary design. At this stage is important to have flexibility and technical knowledge in order to find the most accurate and effective solution that suits the project goal. Sometimes the solution can be an alternative or a complement of standard and conventional solutions.

The above non-standard approach is supported by compatibility tests, product technical analysis and feasibility evaluation into the project methodology, site conditions, project schedule and other constraints in order to technically validate or eliminate each solution.

It is important to finalized the technical assessment by presenting them in details correlating to each tangible solution in relation to the project inputs, highlighting the pros/cons for further discussion.

Finally, your consulting should pursue a solution agreement with the client and only if this meets consensus we move on for the next phase.




Mr. Ignacio Fernandez
ARUP Associate Director | Facade Design & Technology Specialist

“Detailing for building envelopes is becoming trickier these days. We need to balance more exigent and contradicting requirements as building science progresses.

An especially difficult area is the contact zone between facade elements where we are, by definition, “out of the catalogue. Consulting in the business world may not always have a good reputation, however it is key to identify and solve potential issues where separate systems get in contact, or when one system crosses over another. These points may be the perimeter of a window, the joints of modular construction at the cladding, external beams or cantilever penetrations, roof to parapet to wall clashes, etc.

Here is where knowledge and experience are most valuable. After all, water, dampness, vapor and air can pass through very tiny joints! At these points a consultancy-based, open minded approach is essential.”



Figure 2 – Braço de Prata Project, (Portugal- Lisbon)

As a Consulting example, we have frequently facade penetrations that need lose technical analysis in terms of weatherproofing thematic.

I many facade building projects the penetrations through a rain screen cladding, flashing sheets (or other) are not part of the project dealing and therefore they are currently solved at the site without the time and proper step, leading to an inefficient solution and sometimes involving extra high costs not budgeted. The facade system scheme is always a different concept and it is almost difficult to have a standard solution that corresponds to each different project requirements.

Therefore a different non-standard approach is extremely required almost at the initial project phase.

Before any step, listening to the client needs is crucial. During the design of the facade perforations it is highly recommended to be acquired from the following aspects:

a) Quantity and Geometry of the facade perforations;
b) Method of Installation of all the facade elements/materials;
c) Architectural constraints;
d) Movements to be considered on the interface between the perforation and facade elements;
e) Watertighness/ Air/Wind facade requirements;
f) Compatibility analysis for the substrates and adhesion;
g) Site conditions: Temperature/Humidity/Wind;
h) Project Schedule.

It is possible to have plenty of solutions and the above information is relevant to define the next phase.

Consequently all the information collected has to be treated and studied in detail.

Below some pratical examples of different projects with a different non-standard solution:

a) Facade Coping Detail:
Perfuration: Steel H beam through facade flashing
Solution: Effisus Ecofacade Customized Mold (with open joint)

Project Requirement: Waterseal the steel beam perforation.

Project Contraints: Movements expected between elements. Wind and driving rain. Method of installation. Perforation geometry.

b) Facade Structural Rod Connection:
Perforation: Structural rod through facade curtain wall
Solution: Effisus Ecofacade Pre-Fabricated Piece

Project Requirement: Waterseal , Air/Vapour barrier of the structural connection perforation.

Project Constraints: Movements expected between elements. Method of installation.

c) Facade Balcony Detail
Perforation: Structural steel box through facade
Solution: Effisus Ecofacade Mould (with close joint)

Project Requirement: Waterseal the steel beam perforation.

Project Constraints: Movements expected between elements. Architectural design. Method of installation. Perforation geometry.

d) Facade/Roof Intersections
Perforation: Structural beam through facade windows flashing
Solution: Effisus Stopper

Project Requirement: Waterseal the steel beam perforations.

Project Constraints: Movements expected between elements. Wind and driving rain. Method of installation. Perforation geometry.

To conclude these analysis, it should be noted that Consulting is a key element to find several weatherproofing solutions for the facade perforations in order to achieve an efficient product that fulfills the project requirements, that always generates a value engineering always with cost saving for all the parties involved: Facade Contractor; Main Contractor; Architect, Developer, and End User.


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A – Fastener / nail perforations on the building envelope – An inevitable need

A building’s envelope is the filter between the climate outside and the conditioned space inside and as such it has to ensure, among other functions, protection against water and air infiltrations. The number one rule to ensure a building’s enclosure watertightness and airtightness, is to ensure the continuity of the water and air control layer. While it may be easier to define the watertight and airtight solutions for the planer components, usually the bigger challenges arise at the connection areas of these planar components, or at points where these planar components need to be perforated or penetrated by the passage, or fixation, of singular construction elements, with fasteners or nails.

Fastener / nail penetrations should be analysed as early in the design stage as possible, as well as being specified in the construction documents. Prior to construction starting, all contractors with responsibilities in the building envelope will need to acknowledge the treatment of these penetration points. It is the responsibility of the installing contractor to properly identify all fasteners / nails or other associated components that will interface / penetrate the water or air barrier of the building envelope, and assure continuity of the assembly by properly sealing all of these penetration points.

The interfacing or penetration areas are the most common façade water and air leakage paths. Compromising the quality of a sealing solution for these areas means compromising the façade’s complete watertightness and airtightness.

The need for mechanical fasteners / nails to penetrate the finishing building envelope layers is inevitable. In this technical bulletin we will present the benefits of using the Effisus 2Bond DS solution to address this need and warranty its perfect sealing.

B – The status quo

Clearly at the moment the market does not address these points and the need to preconize and install a long-term sealing solutions properly. The most common solution will be to use silicones that shrink over time and no more assure any sealing capacity, or to simply trust on the fasteners / nails self-sealing capacity which, due to the continuous material movements, most of the times will not last long.
The pictures below show the most common scenarious seen on the roofs / facades around us.

C – Effisus 2Bond DS: the right solution

Effisus 2Bond DS is a bi-adhesive tape specifically developed for sealing nail / screw perforations. It is an active sealants based adhesive, sandwiched between two protective and removable layers, sticky on bots sides and in all its surface, completely adhering to the surfaces in which its gets in contact with – it will totally embrace any nail / fastener that goes trough it. It can be folded or rolled into a bead if additional thickness is required, and it can be used as a moldable sealant to fill gaps and holes.

It has an extremely adhesion strength to most common construction materials, such as metals, concrete, plastics, etc.


Effisus 2Bond DS Tape uses an innovative technology with active sealants. This technology uses sealants that don’t have double connections between their carbon atoms, which results in an extremely stable molecular structure, that is resistant to light, ozone and heat.

Through the encapsulation of a special primer, an adhesive that “melts” with the surface where it is applied on, is obtained. This originates an instant bonding, to most known materials used in construction. It can be applied in environments with temperatures from  -56ºC up to +93ºC.

Effisus 2Bond DS Tape

• Exceptional adhesion to most construction materials;
• Permanently watertight and airtight sealing;
• Malleable to any configuration or thickness;
• One-step application, with no need for accessories;

D – Effisus 2Bond DS – Sealing fastener / nail perforations

1– General application – Sealing fastener perforations

2– Sealing fastener perforations when fixing facade metal brackets

3– Sealing perforations on facade vapor control layers or breather membranes

4– Sealing perforations on roofing breather membranes

5– Sealing perforations when fixing border guards

6– Sealing perforations on metal roof joints

7– Sealing perforations when fixing metalflashing

8– Sealing perforations when fixing termination bars


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Birmingham Station Project, (United Kingdom)

Sky View Project, Dubai (EAU)

Nowadays facades buildings projects become more and more demanding and are constantly pushing the boundaries. Currently the façade design is challenged to deliver unique aesthetic façade (curved, twisted, transparent, etc.), energy efficient to fit into an inflexible budget/schedule. Most of the cases this is a high challenge!

Therefore a clear and efficient communication becomes mandatory through all the design stages and fabrication process, between all the parties (Architect, Facade Consultant, Producer, Facade Applicator and End Users) and through all the project phases (Conceptual, Preliminary, Detail Design, Tender, Testing, Fabrication, Installation and Maintenance).

Also full domain of all expertise areas is almost impossible!



Take into consideration the above complexity, partner relationship increases the efficiency to find the better solution!

What is a real Partnership?

Nowadays is difficult to define Partnership and what the guidelines are. In our opinion Partnership in weatherproofing thematic means a lot but essentially is based in a simple concept defined below:

Partnership Desired Value vs Value Offer



We need to bring an added value offer so we make true our partner desire!

Based on our experience as a weatherproofing specialist, partnership is a key factor to support façade buildings projects and find the solution for a giant puzzle of different, individual components and materials part of a building!

Project Constraints:

  • Architectural Design;
  • Façade Design Requirements;
  • Climate Loads: Solar Light/ Water/Air/Moisture;
  • Application and Fabrication Process;
  • Project Schedule;
  • Site Conditions;
  • Experience Factors;
  • Project Weather Conditions;
  • Transportation Logistics;
  • Government & Local building Regulations

What are the advantages of a real Partnership?

Easily enable both parties to overcome the project constraints and built an added value solution on each project/situation. In addition to this, below are highlighted the main advantages based on EFFISUS practice:

  • Service Quality;
  • Continuous Support – Concept design until life span of product;
  • Availability – Everything at everywhere, whenever is required;
  • Non-Standard solutions never considered before;
  • Mutual knowledge and awareness of partner company skills/defects potentiate the proposal/solution efficiency;
  • Timeless;
  • Competiveness;
  • Innovation;
  • Finance.

Another fact that is a must in Partnership relations is when a partner has a critical problem episode and the other partner instantly predispose to solve the episode in contrast of moving away from the responsibility.

“People don´t care how much you know until they know how much you care”

Theodore Roosevelt

Below a graphic that shows a good example of a partnership at weatherproofing thematic:

Based on above is possible to assess that, as much as, the both parties are involved and have more interactions during the project time (axis X) the project design/solution is valued (axis Y).

In conclusion is clear the high benefits of a Partnership and the importance of each partner role in all the project phases in order to achieve Excellence practice on Facade Weatherproof thematic at each project.




Mr. Ignacio Fernandez
ARUP Associate Director | Façade Design & Technology Specialist

“Achieving real partnership in design and construction projects is the Holy Grail of our practice. As Architects, Engineers, Suppliers and Contractors, we are all sitting a round table of knowledge, experience and responsibility. We are all expected to play a role, say our word and listen to the others. When one of the parties tries to skip its responsibility, or hide away from the problems (consciously or not), the balance is destroyed and the result is much poorer.

The real client of the facades is the end user. Insufficient water and air tightness is a clear fail that does not go unnoticed, and it affects everyone involved in the process. The best way to avoid issues with permeability in facades is to have good partners, actively listen to them, and learn on every project. The right outcome is usually a combination of three values: a good design of details and interfaces, select the right materials (properly tested in advance), and think on buildability before installation starts.

Let’s face it: water always finds a way when the solution is not good enough…”


Facade Installation Method Statement

Facade Installation Method Statement


Transportation Pre-fabricated Precast Panel

Facade Precast Panel Assembly

Project Schedule by stages

Primarily, it was listened the client needs (1) in conjunction with the project constraints. All the project phases are important but this was crucial to characterize the project for further technical study & assessment.

Therefore it was collected the below inputs from client:

a) Necessity to find a solution to seal the precast pre-fabricated façade;
b) Multiple types and dimensions for precast panels & windows;
c) Project quantity;
d) Pre-Fabricated solution is mandatory since the application at site has limited access with high impact on costs & assembly methodology;
e) Minimal structural movements are expected on windows interfaces;
f) Minimal movements are expected during the lorry transportation;
g) Project schedule.

Take into consideration the above it was studied in detail how, where and how much the dimensions varies in all the windows schemes. In parallel in was started the draft of some solutions options and shared with client for further discussion (2).

Project Schedule by stages

The general concept was accepted by client and some inputs were added on preliminary design. In sequence of this interactions between the both design teams Effisus/Client it was achieved the basis for the next step: detail design (3)

It was approved a solution of Pre-fabricated Ecofacade individual pieces made specifically for the project with customized shape and dimensions. This pieces were assembled and combined as per windows type at client facilities. In combination with above it was held several meetings with the Architect/Developer to participate and to be aligned on solution approved.

Consequently it was developed the detailed design (3) for the entire weatherproofing solution. It was identified that the solution shape for upper/bottom corners were in all the windows types the same. However for windows bottom central part (precast sill) it was completely different as there were several different shapes and dimensions. The solution found was to cut/split the central part by pieces and so was possible to achieve different combinations and arrangements.

This solution was the key for entire project!

Below a project detail design excerpt from window bottom for a specific window type. It was made detail drawings per each windows type in order to all the parties involved understand the installation methodology.

Detail Design Bottom Window Sill

The detail design was discussed and approved in general. The next phase was to do a full scale mock up tes (4) to validate the weatherproofing solution. Consequently the tests were done and passed successfully.

The next phase was project planning (5) and compatibilization of the Effisus/Client production to project programme.

Overcame the above it was started the production Effisus/Client (6). In parallel specialized teams were engaged by client for Effisus technical training (7). This phase was also very important. It was crucial that the installation team knew and understood in detail the solution, the feasibility and the goals to be achieved!

If not, all the previous added value solutions and considerations were not put in practice and consequently the client would pay a higher cost without any of the benefits designed.

On the next phase and based on a project schedule agreed the Effisus products were delivered by batches.

Below its described a small example of partnership excerpt from the project. It was identified on technical training that the pre-fabricated pieces identification and relation with the windows typology was difficult and critical to the team installation since the project has 10 windows types, plenty of combinations and consequently different pre-fabricated pieces per window scheme. Therefore it was developed a logistic plan to facilitate the above.

Each windows type was packaged in 1 carton box clearly identified the typology, composition and it was also created a color per window type. For instance, if the client production is to assembly 20 windows type A (green) and 10 windows type B (blue), easily it was collected and distributed 20 green box an 10 blue box.

Packing and Labelling Effisus Pre-Fabricated Pieces

The next phase was monitoring the application (7; 8) at workshop, precast facilities and site assembly, so when necessary it was made some corrective actions in order to guarantee an upper final quality.

Site Visit Inspection Effisus Application Form

This was the final stage and was also elementary to deliver to the End Users a project that remains in perfect conditions in accordance with the life span designed.

This practical case clearly shows what is a Partnership and the added value achieved to each façade weatherproofing project challenge.


“It’s about consciously and subconsciously shaping in the client’s mind what your role is, how you see your roles together and what you can bring that could add value”

Wright, N. (2012) – The Partnership Business


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A – Polycarbonate on roofs – Benefits and drawbacks

Polycarbonate has a series of advantages that makes it a very interesting choice for certain roofing applications, when compared with glass or acrylic. It is:

  • a very strong and resilient thermoplastic material – virtually unbreakable with 250 times the impact strength of float glass and 30 times that of acrylic
  • can withstand force
  • extremely lightweight
  • capable of withstanding extreme temperatures
  • resistant to heat, sunlight, snow, and rain – lasts without fading or discoloring
  • has an UV blockage feature

As said before, due to above mentioned qualities it is an effective roofing material for many applications, being used more and more on structures such as:

  • decks
  • garages
  • patios
  • sheds
  • conservatories
  • pool covers
  • roofing on industrial warehouses
  • awnings in commercial buildings

As the panels are extremely light in weight, they can be easily transported and installed wherever they are required.

Nevertheless polycarbonate panels have a few disadvantages when they’re compared to plastic or glass:

  • they are not scratch resistant
  • have a quite high coefficient of linear thermal expansion – its value equals 0,067 mm/m*ºC, which is one of the highest values of this parameter among currently used construction materials.
  • its particular surface properties represent a major difficult for the bonding of adhesives or sealants

B – Joints on polycarbonate – The no.1 challenge when working with polycarbonate roofing structures

Typical joints on polycarbonate structures

High linear thermal expansion of polycarbonate has to be taken into account during the process of installation – sheets should be loosely, rather than rigidly installed within the profiles, which enables the expansion of the material under temperature changes. The aluminum profiles system should be designed with regard to these conditions.
However, most of the times, the high expansion and movement of the panels puts so much pressure on joining materials, making it to failure and break. Many times the sheets start coming out or bulging. This is the no.1 pathology associated with polycarbonate roofing structures.

A failure of the joints of such systems represent a major failure of the system, as it represents water leakages, damages on roof components and its interior, contributing to the rapid degradation of the building. To the roofing contractor water leakages are the no.1 cause for additional costs after the installation is concluded.

Most of the times, the solution will be sealing these joints with silicone or similar materials, or using standard bitumen or butyl sealing tapes. These solutions are not able to absorb the movement – silicones – and do not adhere properly to polycarbonate – tapes will get loose from the substrate very soon.

C – Sealing polycarbonate joints – Effisus Easyrepair: the solution

The Effisus Easyrepair Tape is the ideal solution to seal joints on polycarbonate sheets. It creates a waterproof, moisture, and airtight barrier, with no additional sealing required. It has an exceptional adhesiveness to polycarbonate and is installed in a fast and easy process.

It can be used to seal joints between polycarbonate sheets, or joints between polycarbonate sheets and other construction materials, such as metal, concrete, plastics, etc.

Effisus Easyrepair – Main advantages:

  • Exceptional adhesiveness on polycarbonate and other construction materials
  • Permanent sealing of any joint or leakage point
  • Easy and fast installation, with no need for accessories

D – Effisus Easyrepair on polycarbonate joints – Typical applications

1 – Sealing joints on polycarbonate curve skylights

3 – Sealing joints between polycarbonate sheets and corrugated metal roofs

2 – Sealing joints between metal flashing and polycarbonate skylights

4 – Sealing joints between polycarbonate sheets


1 – Industrial building – Joints between polycarbonate panels



1 – Football stadium – Joints between polycarbonate and metal


1 – Commercial building – Joints between polycarbonate and me

EFFISUS STOPPER – Penetration sealing solution for roofs and facades

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The solution to the nº1 cause of leaks on roofs

Vários Tubos Effisus Stopper

Effisus Stopper seals the most common source of water leakages on roofs: roof penetrations of any size or configuration, such as mechanical equipment, electric conduits, pipes, ventilation ducts or solar panels, for example.

Solutions traditionally applied to seal such penetrations do not have the necessary resistance to the aggressive conditions to which they are subjected: repeated cycles of load, heat, cold, moisture, water ponding, and ultraviolet. Effisus Stopper is an innovative solution that seals such penetrations effectively and definitely.

Effisus Stopper is an extremely versatile solution, with precast molds that are bonded to the roof (or façade) substrate, creating a cavity, adaptable to any configuration, that is filled with innovative sealants with no need for mechanical fastening. It can be installed on the most common roofs: asphaltic membranes, PVC, TPO, EPDM or metal. Application on sloped, metal roofs or even facades is also possible.

Perfis em H

Fixação de painéis solares

 Solution advantages

  • Easy to install – installation in under 15 minutes.
  • Resistant – waterproof, UV and ozone stable, resistant to ice and standing water.
  • Universal – compatible with all membranes and materials (TPO, PVC, EPDM, Bitumen, Concrete).
  • Flexible design – adaptable to any size or configuration.
  • Economic – at a fraction of the cost of any traditional solution.

System components

KIT3 Effisus Stopper

  • 1. Effisus Stopper 1-P Sealant – Self-levelling sealant to fill the molds in horizontal applications. When applied, it ensures a 100% waterproof element, while being permanently flexible, resistant to UV’s and to high temperatures. Elongation capacity of up to 300%.
  • 2. Effisus Stopper M-1 Sealant – Structural sealant for gluing the Effisus Stopper EC / EC molds to the structure. Without solvents, applicable to horizontal or vertical surfaces, resistant to UV’s. Does not suffer volume changes during its lifetime.
  • 3. Molds Effisus Stopper EC/CE – Prefabricated molds in polyester resin, with high durability and resistance to UV’s. Different sizes and configurations available, allowing a perfect fit to any configuration.
Other filling sealant options for special applications:

  • Effisus Stopper SAS Sealant – For vertical or tilted applications. Does not drip and does not shrink.
  • Effisus Stopper SAS HT Sealant – For applications (vertical or horizontal) where the surface temperature can exceed 100ºC. Resistant to temperatures of up to +204 ºC

Typical applications

  • HVAC penetrations
  • Solar panels
  • Equipment support structures
  • Guards
  • Electric cables
  • Antennas
  • Sloped roof
  • Vertical walls
  • Ducts with temperatures up to 204ºC

Solar panel

Multiple pipes

H profile

Project References

Cultural Center – Leisure Complex



Shopping Center Xyami – Commercial Building

Residential Building

BOSCH R&D and production facilities – Industrial Building

[NEW eBook]– “Improving building value through envelope weatherproofing”

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The 1ST Chapter of our new eBook is now available. Click here to:  READ ONLINE | DOWNLOAD

Our previous eBook, about how to improve a building’s value through waterproofing its façade connections, is also available. Click here to:  READ ONLINE | DOWNLOAD

This eBook is being written whilst taking into account the everyday challenges that most façade professionals encounter, when trying to ensure a proper façade weatherproofing.

In case you have any suggestions, comments or issues that you would like to see covered in the eBook’s following chapters, please do not hesitate to contact us, we will do our best to address them in the following chapters.

[eBook Chapter 1.9] – “Successfully managing challenges at the job site”

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Over the past months, the first 8 chapters of our eBook were released.

The newest, 9th chapter, is now available. You can read it online or download it for later reading: READ ONLINE| DOWNLOAD

In case you want to read the eBook version that includes all previous chapters, you can also do it online or by download: READ ONLINE | DOWNLOAD

This eBook is being written whilst taking into account the everyday challenges that most façade professionals encounter, when trying to ensure a proper façade weatherproofing.

In case you have any suggestions, comments or issues that you would like to see covered in the eBook’s following chapters, please do not hesitate to contact us, we will do our best to address them in the following chapters.