Why do you need a roof counter-lattice?

Making sure a roofing system is long-lasting and durable is essential. The roof counter-lattice is one part that is frequently disregarded but is crucial in this context. This easy-to-install but powerful addition greatly extends the stability and life of your roof structure.

A roof counter-lattice, sometimes referred to as a roof counter-batten or counter-battening, is made up of metal or wood strips that are positioned horizontally and parallel to the roof ridge. It fulfills a number of crucial functions that support the overall stability of your roof.

First off, the counter-lattice gives the roofing materials—like tiles or shingles—an additional layer of support. Better drainage and ventilation are made possible by the space that is created between the roofing material and the roof deck. This lessens the chance of mold, rot, and premature roof covering deterioration by preventing moisture buildup.

Second, the counter-batten aids in distributing the load applied to the roof structure uniformly. This additional support can lessen the effects of stress and movement in the structure in areas that are prone to heavy snowfall or strong winds. It strengthens the roof system’s resilience, increasing its long-term ability to withstand bad weather.

In addition to its structural advantages, the roof counter-lattice contributes to increased energy efficiency. It aids in controlling attic temperature by encouraging air movement beneath the roof covering. In the long run, this may result in energy savings by lessening the strain on HVAC systems.

In conclusion, the roof counter-lattice is an important part that shouldn’t be undervalued, even though it is frequently invisible once the roof is finished. In addition to enhancing ventilation and adding structural support, it also makes your roof more resilient and energy-efficient overall. Comprehending its significance can aid both homeowners and builders in making well-informed choices to guarantee a sturdy and enduring roof.

Why do you need a roof counter-lattice?? Difference from traditional lathing

The roofing system’s counter-lattice consists of wooden blocks that are installed atop the water barrier on the rafters. Because of the gaps that are made, it is meant to ventilate the material beneath the roof. Any kind of roofing or insulation material can be used to install it.

It is not advised to use foam plastics for under-roof insulation. These materials can produce a thermos effect that is damaging to metal and wood because they prevent steam from passing through. Typically, the counter-lattice consists of a wooden block with a cross-section measuring at least 25 x 50 mm. It’s thought that a 40 x 50 mm wooden lathe is the most trustworthy. It is possible to use composite or solid bars during installation.

A batten and a counter-batten differ in the following ways:

1. When installing counter-battens, they are mounted on the rafters, immediately behind the waterproofing; the lathing is mounted on top of the counter-lattice;
2. The distance between the counter-lattice fragments is equal to the distance between the rafters; the sheathing can be continuous or at intervals depending on the type of roof and the roof slope;
3. The main function of the counter-lattice is ventilation of the roofing material; traditional lathing is used to fasten roofing materials and rafter elements.

Moisture’s impact on the inside and roof is reduced because of the counter-lattice. The counter beam keeps the waterproofing film safe from drooping and other damage that could obstruct ventilation.

Counter beams assist in leveling roof slopes when there are slight variations in the height of individual rafter system components. Additionally, roofers can move around the building without causing damage to the insulation (roofing felt, etc.) thanks to the counter-grill.

What is a counter-lattice (picture example)?

Installation of a roof pie

The following components make up the roofing pie, a unique design that shields the roof from various harmful influences:

• Vapor barrier. Protects thermal insulation from fumes from the room. Installed from film secured with connecting tape. New technologies for this device may include a foil layer that improves fire-resistant and thermal insulation properties.
• Thermal insulation layer. Usually done using mineral wool slabs treated with special impregnations, or using extruded polystyrene foam. To protect the thermal insulation layer from moisture penetration, installation is carried out when the wood moisture content is reduced by at least 18%.
• Ventilation gaps. For ventilation, ventilation holes and eaves boxes are placed near the ridge.
• Anti-icing system. In areas of possible icing and snow accumulation, place heating cables connected to the control unit and temperature sensor. This system turns off and on automatically.
• Moisture insulation. The choice of waterproofing barrier depends on the specific roofing material. Here it is important to correctly position the sides of the material: one goes to the roof, the other to the insulation. There are several types of hydrobarriers. Diffusion and superdiffusion membranes are films with microholes that retain moisture but allow steam to pass through. Condensation films are used together with two ventilation gaps (moisture getting on the film moves into the ventilation gap).

The type of material used for the roof base determines the features of a roofing pie installation.

Do you need a counter-lattice for a cold attic??

A cold attic is almost always empty and without heat (99% of the time). This design keeps moisture and condensation from building up and necessitates strong ventilation. As a result, the counter-lattice is required to provide a ventilation space between the waterproofing and the roofing material.

Additionally, you won’t need to apply a specific protective compound to the sheathing thanks to the counter-lattice.

Chilled Pie in the Attic

What material is used for the counter-lattice?

The choice of raw materials is the first step in building the counter-lattice. It is advised to use pine or oak wood for counter beams when installing a heavy roof covering.

Selecting soft wood species (aspen, etc.) is necessary for flexible tiles and other lighter roofing options. For a traditional roof, the standard thickness of the counter beam is 30 x 50 mm.

Counter beams with 40×50 and 50×50 mm cross sections work well for more intricate structures. The timber is 1.5 meters long and can have a counter-lattice height of 20 to 50 mm.

Many experts recommend installing counter battens for any type of pitched roof.

Simultaneously, an increasing number of developers are employing top-notch contemporary material that is incredibly dependable and robust. These materials consist of film, waterproofing membrane, etc.

Counter-lattice for metal tiles: installation example

The majority of roof coverings, including corrugated sheets, use counter bars with a 30 x 50 mm cross section. Consider installing a counter-lattice beneath metal tiles as an illustration of how to do it. Fill the counter-lattice after attaching the waterproofing film to the rafter structure.

Metal tile counter-lattices typically measure between 135 and 137 cm in length and 30 by 50 mm in cross-section. In increments of about 30 centimeters, galvanized nails are used to secure them.

Under metal tiles, counter-lattice installation is done in the following order:

1. Before installing the beams treated with special antiseptics, protecting the tree from rotting and damage by insects;
2. After laying the hydraulic barrier, they begin to secure the counter beams;
3. Fastening is carried out using galvanized nails on the surface of the waterproofing film;
4. During work, make sure that the counter beams are fastened in parallel rows and run perpendicular to the cornice strip;
5. Marking of the batten pitch is applied to the counter-lattice (calculated in advance), marks are applied from the second beam from above in the direction of the beam, which is mounted on the ridge; along the entire length of the structure, the step size remains unchanged;
6. The marks of the bars are connected using dye lacing;
7. Carry out the filling of the sheathing, if necessary, placing slats of the required thickness – these actions allow you to level the plane of the roof slope.

A fire retardant can also be applied to the counter grille to lower the structure’s risk of fire.

By doing these things, you’ll be able to address a variety of roofing issues:

• Increasing the service life of both the entire roof and its individual elements. Achieved by providing an air gap that facilitates ventilation of the space between the metal tile and waterproofing.
• Maximum reliable fastening of the waterproofing membrane.
• Brusy protection from bending and cracking.

In order to install metal tiles, technology may involve the stuffing of beams or rough boards to allow for movement on the roof.

Useful video

Using your hands, install counter-lattice beneath metal tiles:

There is more to protecting your roof than just the visible shingle or tile layers. Frequently disregarded yet vital, a roof counter-lattice provides protection against a range of environmental elements. It creates a barrier of protection when positioned in between the roofing material and the structural base. This layer protects against possible water damage by keeping moisture from penetrating into the underlying structure.

A roof counter-lattice also makes your roof more resilient and long-lasting. It reduces wear and tear from mechanical stress, thermal expansion, and contraction by minimizing direct contact between the roofing material and the base. This preventive measure is a wise investment in the structural integrity of your house because it not only prolongs the life of your roof but also gradually lowers maintenance costs.

Furthermore, a roof counter-lattice helps to raise your property’s overall energy efficiency. It facilitates more efficient indoor temperature regulation by adding another layer of thermal protection. This insulation effect helps to lower annual heating and cooling costs, fostering a more economical and environmentally friendly way of life.

A roof counter-lattice is an essential component of construction that improves the stability and longevity of roofs. It serves as a barrier between the roofing material and the roof structure, distributing weight uniformly, preventing temperature-related deformation, and fortifying the roof against wind uplift. In addition to extending the roof’s lifespan, this frequently disregarded part also maintains the building’s structural integrity, making it an important investment in keeping a secure structure.

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