Install Bathroom Vent Fan Through Roof
Step 1: Enter Zip Code. Step 2: Describe Project. Step 3: Get Quotes From Pros. Compare Bids To Get The Best Price For Your Project. This Old House general contractor Tom Silva shows how to properly install a roof-mounted bath-fan vent. (See below for a shopping list and tools.)SUBSCRIBE t... Start in the attic and drill a hole through the roof in the desired vent location. Try to keep it close to the fan location. Leave the drill bit sticking through the roof so you can find the hole. From up on the roof, use a jigsaw or reciprocating saw to cut a 4-in. round hole.
From inside the attic, drive a nail through the roof directly above the bathroom vent fan. Center the nail between two rafters. 2. From the roof, find the nail and use the utility knife to cut roof shingles from around the nail. Bathroom fan installation requires outside ventilation. If the fan isn't accessible through an attic, you'll need to vent through a sidewall of your house. These types of ducts and vents are typically installed when the house is built. If you don't have a duct leading to a sidewall vent, call a professional for help. When venting a bathroom exhaust fan, make sure to vent the air to the outside, rather than into your attic where it can cause mold and mildew to form. Options for venting a bathroom exhaust fan include (best to worst): Through the roof or an exterior gable wall. Behind a gable vent. This setup requires an in-line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms (see photo). A grille in each bathroom attaches to ducts, which then fasten to a "Y" connector at the fan. A single exhaust exits through the roof (Figure A). You mount a switch in each bathroom.
A bathroom doesn't necessarily need to be vented thru the roof if a bathroom window is cracked to allow steam to escape. I live in a state where new and refurbishing building codes are closely regulated> installing a vented to the outside ceiling fan can be performed by a handy homeowner or a roofer without a permit. Learn the secrets to running anew exhaust line through the outside wall, install a fan and connect the ducting and electrical. Cheers!Here is the link to the... Through the Roof Depending on the location of the bathroom, it may be easy to vent the exhaust fan through the roof. This involves running ductwork from the fan, usually though an attic, and out through the roof. In order to accomplish this, the roof has to have a hole cut in it.
The next-best location for a bath fan cap is a wall that's at least three to five feet from a roof overhang. Most roof overhangs today have continuous soffit ventilation strips. Bath exhaust is... To vent a bath fan through the roof, you must first prepare a ductwork connecting the roof top to the bathroom. Then, drill a hole on the roof top. Over there, mount the vent hood using tri polymeric locking seal paste and put the nails to strengthen it. Table of Contents [ show] I recommend that my clients vent their bath fans out a gable wall if at all possible (when not using an HRV or ERV, that is). If you vent through the roof, condensation will drip back into the interior. If you vent through a soffit, where attic vents are often located, the moisture will get sucked back up into the attic or roof venting.
Install the roof vent by sliding the top flange under the shingles above it and resting the bottom flange on the shingles below. Apply roofing adhesive on the underside of the flanges to seal. Secure the vent flanges with roofing nails before installing the shingles. Draw a mark on the bathroom ceiling where you'd like to install the vent fan. For optimum performance, locate it between the shower and the toilet. Use an extra-long, 3/8-inch-diameter spade bit to bore a reference hole through the ceiling and into the attic. Climb into the attic and clear away any insulation from around the hole. HVAC guy may sell and install the fan also. This varies around the country, but you were on the right track. Source: www.bayareacool.com. Answered by hosey: Any person competent in installing an outside vent- either thru the roof, soffit, or gable/hip end of the house thru the siding. Each bath fan should be on a separate 4" or larger duct and ...
Don't forget to clean the bathroom exhaust fan beforehand. Can I Vent Bathroom Fan Through Soffit? Yes, you can vent the bathroom fan through soffit. This eliminates the need for you to make a hole in the roof or your walls. If you are looking for a DIY install, roof ventilation is a risky job. This article series explains how to install bathroom exhaust fans or vents, the vent ducting, the vent termination at the wall, soffit or roof, vent fan wiring, bath vent duct insulation, bath vent lengths, clearances, routing, and we answer just about any other bathroom ventilation design or installation question you may have. I intend to install the roof vent cap in the section to the right of the section where the plumbing vent is shown. Also, this is the section of roof that gets hit directly with heavy winter winds. The internal construction of the house does not permit me to vent the bathroom fan elsewhere.