Academia
Diploma thesis 2014kritine · krovstvo · stavbno kleparstvo

The Importance of Materials and Services in Roofing and Sheet Metal Work

Roof covering is one of the protections that most safeguards human beings.

Damir RihtaričEkonomist · supervisor Alenka Valcl · defence december 2014
In brief

The project in five facts.

AuthorDamir Rihtarič
SupervisorAlenka Valcl
Module—Ekonomist
Employer / clientAcademia
Year2014december 2014
About the project

Challenge, approach and results.

Roof covering is one of the protections that most safeguards human beings. Accordingly, humans are aware of its importance and improve its quality. Every procedure was agreed upon in advance, every action carefully considered. They demonstrated that the price of an ordinary roof tile can be deceptive and that for smaller structures, a significant share of the final cost is contributed by ** additional roofing elements**, such as various ridge tiles, three-way ridge elements… With the help of a special computer programme, they calculated the price of sheet metal materials required for the roof.

Problem

Roof covering is one of the protections that most safeguards human beings. Accordingly, humans are aware of its importance and improve its quality. In parallel with the production of new materials, human knowledge is also being supplemented and experience is being accumulated.

The origin and development of roof covering are the main topics of the opening chapter of the diploma thesis. Some materials that were used in the past are still very relevant today (clay, copper…). Roofing and building sheet metal work are designated as the trades that, alongside carpentry, are most closely connected with the "covering of a structure". Services in the aforementioned activities must be performed with ** quality**, with a touch of complete professionalism, regardless of the client's social and financial status.

The main characteristics of services and the relationship between the investor and the contractor are described in the continuation of the diploma thesis. As has already been emphasised in several chapters, the roof is of essential importance for the well-being of humanity. Advanced technologies and the knowledge associated with them have led to the vigorous development of roof coverings, such that in a few thousand years they have progressed from roofs covered with animal hides to roofs that are either of natural or artificial origin.

Today's roof coverings, in addition to protection, also provide us with additional positive properties, such as insulation, ventilation, longer-lasting usability and aesthetics. Although roofing materials contain an increasing amount of substances that are difficult to degrade, they are increasingly relevant in today's times. We live in an era when certain other characteristics of the individual prevail, and environmental awareness is rare.

Although new materials are mostly a good choice for our roof, the majority of neutral experts agree that current roof coverings will not even come close to reaching the age of those used by their ancestors. In the next chapter, they touched upon the characteristics of services. If we look back not far into history, all roofing work required its own time.

Solution and Method

Every procedure was agreed upon in advance, every action carefully considered. People helped each other in a friendly manner; the presence of self-interest was not felt. Today, everything more or less rests on earnings, and as quickly as possible at that.

There are more and more variations of coverings, but fewer and fewer professionals who would approach the roof first from the client's perspective, only then from their own. Relations between people, in their case between the client and the contractor, have cooled. The properties of coverings, their compatibility with the climate, the pitch of the roof and its intended use are very important when selecting the latter for a particular structure.

Each covering has limits set in its standards for the roof pitch. If the angle of the roof surface is greater or smaller than prescribed, the contractor as a rule may not accept or carry out the work, as this violates the guarantee and exceeds their authority. It must be known that coverings do not have standards prescribed free of charge, which contractors should observe.

Manufacturers test their products under specific conditions (pitch, presence of wind and rain, density of battens…), adapt the standards accordingly, protect their product and consequently insist on compliance with their requirements. In this way, they safeguard themselves against unnecessary complaints and clear their name before potential consumers. Additional roofing elements are in most cases absolutely necessary, but at the same time they also represent a greater financial burden.

In their wider area, it is difficult to imagine a roof made according to standards that would not contain snow guards (except in coastal areas and very steep roof surfaces), on which a ** ventilation strip** would not be present (at least for residential structures), which would not have a ** dry-mounted ridge** (except in coastal regions). Alongside the entire repertoire of additional elements, it is precisely these factors that, in the case of complex roofs, cause the difference in the final quotation. The client is often misled by the amount stated for the price of ordinary roof tiles, but is not attentive to the quantity of roof tiles required per square metre of roof surface, let alone the price of additional products necessary for the flawless execution of the entire roof.

The principal task of the roof is protection against external influences, therefore it must not allow water to pass through. This means that all roofing and sheet metal work must be performed with quality. For this reason, standards exist that prescribe in what condition the contractor must leave the roof.

Likewise, standards restrict the choice of coverings in certain areas (primarily for structures that are under heritage protection). In the final chapter, they demonstrated, using the example of a gable roof with two hips, how to extract from the plan the data we need for ordering roofing material.

Results

They demonstrated that the price of an ordinary roof tile can be deceptive and that for smaller structures, a significant share of the final cost is contributed by additional roofing elements, such as various ridge tiles, three-way ridge elements… With the help of a special computer programme, they calculated the price of sheet metal materials required for the roof. With the same programme, they also drew some flashings that are not standard.

To prepare the quotation, it was necessary to add the price of the service, break everything down into items that are comprehensible, and calculate. They established that there is a very large difference in price between copper and aluminium colour-coated sheet metal. Although copper is an extremely high-quality material for gutters and other sheet metal products, a price four and a half times higher than brown aluminium is certainly excessive in relation to quality.

From all angles, roofing and building sheet metal work are important trades that deserve beautiful and high-quality products as well as grateful and satisfied clients.

Strešna kritina in gradbeni materiali za krovsko dejavnost
Diploma thesis

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