How important is soffit ventilation with tiled roofs?

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While attempting to install a security camera in the soffit of my bungalow home, I noticed that there is wood paneling beneath (above) the soffit. The soffits are aluminum, and it looks as though there are breathable soffit panels every 12' or so. The wood appears to be solid, I assume where the breathable panels are there is a gap in the wood.

EDIT: My brick bungalow is approx. 1100sq/ft, My roof pitch is 8/12. Just before the peak on one side there are 4 roof vents, evenly spaced. In addition, there are gable vents close to the top of the brick at either side of the house.

My roof tiles appear to be in good condition, but I am concerned that I do not have enough ventilation intake. Is it still recommended to have wood above soffits? Am I risking damage to my roofing tiles by leaving this for a couple of years, or is it recommended to deal with this asap (if ventialtion is indeed inadequate)?

por Toby 29.07.2019 / 18:23

1 resposta

Attic Ventilation shall be “cross ventilation “ and shall be 1/150th the area that is to be vented. (See ICC R806 Vents.)

No entanto, há uma exceção: a ventilação do sótão pode ser reduzida para 1 / 300a área a ser ventilada, desde que um dos seguintes itens seja atendido:

1) um retardador de vapor de classe I ou II está instalado no lado "quente do inverno" do teto, ou

2) not less than 40% and not more than 50% of the ventilation is located in the upper portion of the attic. The upper portion is defined as: “Upper ventilation shall not be lower than 3’ below the ridge or highest point of the roof. “ (See ICC R806.1.2.)

Also, the Code says you’ll maintain a 1” clearance between attic insulation and framing.

So, you can see there is clearly a benefit to having ridge vents, gable vents, etc. , but in a proportion that allows COMPLETE CROSS-VENTILATION to the attic....and cross ventilation is best with soffit vents.

Remember, you’re venting the attic to remove condensation. Condensation damages wood, not your tile roofing. I’d act quickly.

29.07.2019 / 19:50

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