For ridge ventilation to work, the subfloor must not cover the gap in the ridge between the platform from both sides. Also, if it's really a vented ridge, there should be some method to at least try to prevent things from flying, flying, or crawling directly into the attic. If the wrong type of ventilation is installed for a specific roof design, the products may mix. For example, when a ridge-shaped ventilation duct is installed on a gable roof with very little ridge, it may not provide sufficient air outlet for the attic space. When this happens, another exhaust fan, such as a roof grille or an electric vent grille, will be added to increase ridge ventilation.
However, doing so can cause problems. I attached a photo of a very similar roof, but in mine there is no fiber material like the one being installed in the photo. Static ventilation grilles, such as ventilation grilles in ridges or roof grilles, rely on adequate intake, but the same goes for electrical exhaust grilles, which will have to work too hard to carry air through the attic, causing premature failure of the electric ventilation motor. I began to wonder if there was little chance that I would have misunderstood anything about how ventilation grilles work on ridges (I was raised by a general contractor and I did roofing when I was young, but this is the first ridge vent I've seen up close).
Roof ventilation grilles form the base of a house's attic ventilation system, helping to breathe and preventing the roof system from being damaged year-round. Ventilation grilles should always be placed at the highest possible point of the roof (on or near the ridge), which is normally aligned with the highest part of the attic space. Yesterday I noticed that the house looked quite warm inside, but I expected that the new roof and some additional ventilation grilles in the ridges would have helped to keep the cooler house. The old roof already had a crested ventilation grille, so the grooves were already cut for the most part, and they added a new row.
Make sure to place the intake vent at the lowest possible point of the roof (usually on or near the ceiling) so that it aligns with the lowest part of the attic space. If a ventilation grille is placed too low in the roof, or if there are two ventilation ducts stacked, one of the ventilation holes could act as an entrance and interrupt or short circuit the air flow throughout the attic, reducing its effectiveness. The plastic roll that they place over the entire roof (what I can see under the ventilation grille of the ridge) is light gray or white.).
