The roof is an important component of your home’s defense. It’s crucial to comprehend the installation procedure if you’re thinking about installing metal tiles on your roof. Because of their strength, beauty, and ability to withstand inclement weather, metal tiles are highly sought-after. Still, there’s more to correctly installing them than just laying the tiles on the roof. It necessitates a thorough strategy called the roofing pie.
The layered structure that makes sure your roof is waterproof, ventilated, and well-insulated is known as "roofing pie." Every layer in the roofing pie has a distinct purpose that adds to the roof’s longevity and overall performance. To avoid problems like leaks, heat loss, and condensation, every component—from the vapor barrier to the outer layer of metal tiles—must be installed precisely.
We’ll dissect the process of installing a roofing pie for metal tiles in this guide. We’ll go over the supplies you’ll need, the functions of each layer, and advice on how to ensure a smooth installation. This information will help you comprehend the procedure and make wise decisions for your roofing project, regardless of whether you’re a do-it-yourself enthusiast or hiring professionals.
You will have a clear understanding of the steps involved in building a durable and effective roofing system using metal tiles by the end of this article. Let’s get to work installing a roof that will last for many years in addition to looking fantastic.
| Step | Description |
| 1 | Install the vapor barrier layer |
| 2 | Place the insulation material |
| 3 | Install the waterproofing membrane |
| 4 | Fix the counter-battens |
| 5 | Install the battens |
| 6 | Lay the metal tiles |
- What is a roofing pie for metal tiles and what does it consist of?
- The step of the crate for metal tiles and the counterpart
- How to calculate a step?
- Counter-lattice
- How to protect your roof from moisture?
- Waterproofing
- Vapor barrier
- Insulation of metal tiles – choice of material
- Roofing cake under the cold roof
- The device of the attic roof
- Video on the topic
- METAL TILE INSTALLATION. ROOFING PIE
- Roofing pie. How to properly make a roof
- Rules for installing a roofing pie. Features of using membranes // FORUMHOUSE
What is a roofing pie for metal tiles and what does it consist of?
The set of layers from which the roof is laid is referred to as a roofing pie. The number of layers and how they are laid out can vary depending on the use of the space (warehouse, industrial, or residential).
How are metal tiles made? The following is the order in which the roof pie beneath the metal tiles is laid:
- rafter system (roof frame, made, as a rule, from wooden beams, serves as the basis for applying layers of roofing pie);
- vapor barrier (prevents moisture from entering to roofing pie);
- thermal insulation (provides heat preservation in room);
- waterproofing (serves to ensure dryness of the room, prevents moisture from entering the room (waterproofing films, membranes));
- counter-lattice;
- sheathing (wooden frame, which is superimposed and transfers the roofing load to the rafters. The crate has a step less than that of the rafters, and the bars are superimposed perpendicular to the rafters);
- roofing material (External roofing, providing the protection of the roof from atmospheric influences, wind, dust, moisture in the room: metal tile, ondulin, corrugated board).
Furthermore, the roofing cake is equipped with ventilation gaps in between layers.
Every layer has unique styling characteristics.
The step of the crate for metal tiles and the counterpart
The crate serves as the foundation for installing roofing layers since it is a continuous or lattice roofing flooring.
How to calculate a step?
You must know the size of the tile material and the crate’s step in order to determine how much material was used on it. The size of the step is dependent on the step size of the coating waves. The space between the design boards is known as the crate’s step.
Determine the pitch when laying with gratings by looking at the size of the roofing material.
Remember that the length of the roof (first board) from its edge to the second board should be less than the pitch all the way around the roof. Occasionally, two boards are fastened together in a row at intervals of one to two centimeters from below. The boards are then laid out using the pitch calculation specific to a particular kind of tile.
Here, an online calculator can be used to determine the rafters’ pitch.
The suggested step size is frequently indicated on the coating material’s packaging by manufacturers of high-quality materials.
Therefore, the sheathing for tiles with varying transverse wavelengths should be laid:
- at wavelength 300 mm — the pitch of the sheathing of the first two boards is 230 mm, then 300 mm;
- at wavelength 350 mm — 280 mm and 350 mm respectively;
- at wavelength 400 mm — 330 mm and 400 mm.
In the event that step width indicators are absent, the step can be measured by setting a level on the rafters and measuring the distance between the end of the sheet and the top slope of the first wave of tiles.
Under the sheathing, the board should be 30 mm thick. The suggested width for the first board is 50 mm.
The angle of inclination of the roof directly affects how long it takes to remove the tile covering for rain protection; the higher the angle of inclination, the longer the material must be removed beyond the sheathing line. The metal tile must overhang to the drain, so the first step’s calculation must account for the metal tile’s 30- to 50-mm protrusion over the roof’s edge.
Continuous sheathing offers a higher degree of roof load-bearing capacity, but it also consumes more materials and is easier to install. Installing continuous sheathing on roofs with a slight slope involves laying it in centimeter-sized increments from edged boards or beams (section 50×50 mmmm).
Counter-lattice
A counter-lattice is a technique for applying beams to a waterproofing layer. Unlike sheathing, this kind of overlap is applied directly through the waterproofing layer to the rafters, giving the roof ventilation space.
The counter-lattice bars have a height of 20–50 mm.
With a counter-lattice composed of 30×50 mm beams and a straightforward gable roof.
Use 50×50 mm beams if the roof has a complex structure or multiple slopes.
Building a sturdy, weather-resistant roof requires layering different materials when installing a roofing pie for metal tiles. This procedure guarantees adequate ventilation, insulation, and resistance to temperature fluctuations and leaks. Homeowners can install a durable and effective roofing system that improves the overall structure of their house by following a step-by-step procedure.
How to protect your roof from moisture?
The roof’s vapor barrier and waterproofing are crucial components of the roofing system.
The vapor barrier stops moisture vapor from the room from penetrating the insulation, keeping the thermal insulation from becoming wet. In contrast, the waterproofing layer shields the thermal insulation layer from moisture and releases it outside.
Now, let’s examine the various kinds of waterproofing.
Waterproofing
Moisture can be retained and air can flow through waterproofing. There are two types of waterproofing materials: internal and external.
- membranes;
- adhesive waterproofing;
- coating;
- film waterproofing;
- sprayable.
Under metal tiles, film waterproofing or membranes are most frequently utilized. Using a construction stapler and galvanized staples, the waterproofing layer is applied perpendicular to the rafter boards.
Vapor barrier
Under insulation is a vapor barrier installed. Materials for vapor barriers: foil, special film, and membranes.
The rafters support the vapor barrier. So that moisture droplets do not collect in the under-roof space, an air gap must be made between the vapor barrier layer and the ceiling.
Layers for vapor barriers and waterproofing need to be installed correctly side down. If not, you may get the opposite result.
Furthermore, it’s critical to distinguish between these two layers because they are each made with specific purposes in mind and serve distinct purposes.
Insulation of metal tiles – choice of material
An integral part of the roofing pie is insulation. This stratum offers:
- heat preservation indoors, preventing it from escaping outside;
- sound insulation (especially with a metal roof);
- durability roofs.
Aspects to consider when selecting an insulating material for a metal roof include:
- life time;
- weight;
- frost resistance;
- vapor tightness;
- dimensional stability;
- environmental friendliness;
- water absorption;
- soundproofing;
- thermal conductivity;
- safety.
The most popular materials used to insulate metal roofs are:
- expanded polystyrene (features: good soundproofing, thermal insulation properties, however: fragile during installation);
- mineral wool (features: does not burn, does not absorb moisture, safe);
- polyurethane foam (non-flammable, good heat insulator, applied by spraying);
- cellulose insulation or eco-wool (features: environmentally friendly, lightweight, cheap, however, susceptible to the influence of microorganisms, used exclusively for dry rooms);
- foam glass (features: dense material, good insulation, durable, but installation is ensured with glue).
The complexity of the roof’s design, its qualitative indicators, and its pricing indicator should all be taken into consideration when choosing the material for the arrangement.
Roofing cake under the cold roof
The device of its layers distinguishes a roofing cake from a cold roof. It’s critical to apply layers correctly and leave space beneath the roofing for air masses to move.
Below the chilly roof, the layers of a roofing pie:
- rafter system;
- waterproofing layer;
- Contracuard;
- crate;
- metal tile.
In this scenario, precipitation in the room, condensation on the roof, and the possibility of ice formation are all ruled out.
The device of the attic roof
The roofing pie device under the attic roof involves installing layers in the order that the insulation is installed.
The layers of the metal roof pie in this instance are as follows:
- rafter system;
- vapor barrier;
- thermal insulation;
- lathing;
- counter-lathing;
- metal tile.
Appropriate layering, maintaining air gaps in the roof, and material selection are all significant indicators of the strength, warmth, and quality of roofing beneath metal tiles.
Since the quality of the materials is one of the requirements for guaranteeing high-quality roofing as well as warmth and dryness in the room overall, you shouldn’t skimp on them.
By installing a roofing pie for metal tiles, you can make sure your roof is durable and well-protected. Every layer is essential to preserving energy efficiency and shielding your house from the weather. To get the best results, it is essential to follow the installation instructions precisely.
Establish a strong foundation by making sure the roof deck is ready. To prevent moisture from penetrating the insulation, add a vapor barrier. Together, the waterproofing membrane and insulation in the following layers stop heat loss and water damage. To prevent problems later on, make sure these layers are installed and sealed correctly.
At last, the metal tiles are put in place, producing a finish that is both sturdy and appealing. For these tiles to endure severe weather and guarantee the roof’s longevity, proper installation is crucial. In order to protect your investment and give you peace of mind, regular maintenance and inspections will help keep the roofing pie in excellent shape.
