Hip Roof Soffit Ventilation

Venting hip roofs realizing the potential of roof venting in warm climates is really limited to cooling the attic air space and does little to remove moisture or lower roof deck temperatures.

Hip roof soffit ventilation.

A hipped roof with an attic can be vented the same way a trussed gable roof is most typically done with soffit vents and near the peak sufficient roof vents for the area of the attic. Hip and ridge shingles starter shingles low slope products ice and water barrier synthetic underlayment intake ventilation exhaust ventilation titanium and rhinoroof. Many of these homes had hip roofs and are considered high end homes built about 8 10 years ago. None of them had power attic fans.

Figure courtesy of the nrca. All the homes with hip roofs had soffit intakes and static roof vents. You would only need 15 foot. A number of problems that could come up when trying for the ventilation of hip roofs is able to be that there s possibly not sufficient exhaust ventilation.

For the best results place roof ventilation near the roof s peak and soffit vents in the eaves. Hip vents are special because they need to have internal baffles that block snow and rain that can blow sideways across a roof. Air flows in through the soffit vents and out through the roof vents. One type of shingle over ridge vent provides 18 sq inches per foot.

Choose one of the. Videos cobra hip vent provides effective ventilation on hip roofs with little or no ridge area. Figure 7 mechanical ventilation used with a hip roof. Not too long ago this practice was not recommended because traditional ridge vent products were used and they were rather prone to weather infiltration.

Grab a flashlight and inspect your attic during the winter. An attic room of 1 200 sq. If you see dampness or frost you need better roof ventilation and some attic vents. If you have a hip roof be sure you install a special vent on these areas of your house.

Using your numbers of 42x26 300 then divided by 2 1 82 sqft 144 262 sq inches exhaust ventilation. Other vent products are coils of plastic fabric that resembles coarse steel wool. One big difference between these roofs and my roof was that these other homes had roof vents on three of the four sides. The problems with venting of hipped roofs are confined to those with cathedral ceilings below.

It appears you can get real close to achieving the proper exhaust ventilation with the ridge you have for the upper roof. 218 4 pieces 389 3 pieces 829 2 pieces. Foot requires cobra exhaust vent structure of 17. You could require compensating with additional exhaust.

Vents come in various styles. It provides 9 sq. Inches per linear foot 19 051 mm 2 lm of net free ventilating area to help exhaust heat and moisture from the attic. Another option is to install hip ridge vents along the ridge lines of a hip roof.