New Haven Roof Code: Wind, Snow Load and Ice Barrier

New Haven is in a hurricane-prone region. The city's ultimate design wind speed is 125 mph. That number decides which shingles we install. We use shingles rated for wind up to 129 mph, the band that covers New Haven. The wind class is printed on the bundle wrapper, and we check it before the bundle goes up the ladder.

The ground snow load here is a set weight per square foot. When a re-roof needs a permit, the framing that carries snow has to hold the design snow load. If a rafter, ridge board, or header can't carry it, we reinforce or replace it before the new roof goes on. A few exceptions apply. We tell you when your house falls under one.

Ice barrier underlayment is required. We lay ice and water shield at the eaves, where ice dams push water back under shingles. We also run a strip of self-adhering membrane over every joint in the roof decking. Older roofs sheathed with lumber boards under 3 feet wide don't need those strips. Plywood and OSB decks do.

We inspect the roof and the attic. We walk the roof and check for missing shingles, curling, granule loss, nail pops, and flashing failure. Then we go into the attic. We check rafters for sagging and cracks, look at the underside of the decking for water stains and rot, and note poor attic ventilation. A roof inspection gives you photos of everything we found.

We file for the permit. We pull the permit before tear-off. On a re-roof, the permit is what brings the snow load check on your existing framing. If the attic shows framing that needs work, that work goes in the estimate. Our roofing permits guide covers the paperwork.

We tear off to the deck. We spread protective tarps over plantings and walkways and strip the old roof with roofing shovels and pry bars. With the deck bare, we inspect every sheet or board. We cut out soft, rotted, or delaminated sheathing and replace it. We also note whether the deck is boards or plywood, because that decides the next step.

We seal the deck joints. On plywood and OSB, we press a strip of self-adhering membrane over every joint in the deck. We install it to the manufacturer's instructions for that deck material. On narrow board sheathing, we skip the strips and go straight to underlayment.

We install ice barrier and underlayment. We lay ice and water shield along the eaves and up the valleys. Synthetic underlayment covers the rest of the deck. Drip edge goes on at the eaves and rakes.

We fasten for wind. We install the wind-rated shingles with the nailing pattern the manufacturer specifies for high-wind installation. Starter strip goes along the eaves and rakes, where wind lifts shingles first. We set the roofing nail gun so nails sit flush. An overdriven nail cuts the shingle and loses its hold.

We flash, vent, and finish. We install step flashing and counter flashing at walls and chimneys, valley flashing, and new pipe boot flashing. We cut in the ridge vent and cap the ridge. Then we do a post-installation inspection and send you before and after photos. The full sequence is in our roofing project process guide.

The 125 mph wind speed and the 30 psf snow load apply across New Haven. Wind exposure does not. It is decided house by house. A house on an open lot facing the harbor takes harder wind than one sheltered by trees and buildings a few blocks inland. We check what sits upwind of your roof, whether open water, open ground, or dense cover, and fasten to match.

New Haven also has wind-borne debris areas. These are areas within one mile of the mean high-water line where open water sits upwind at the shore. In Morris Cove and along the East Haven and West Haven shorelines, we measure how close the house sits to the water and check what lies upwind. Wind-driven debris punctures shingles and tears flashing loose, so we check every edge, rake, and penetration before we leave.

New Haven sits in a cold, humid climate zone. Winters freeze and thaw over and over. Ice dams form when attic heat melts snow on the upper roof and the water refreezes at the cold eave. We balance attic ventilation with soffit vents and a ridge vent so the deck stays cold. The ice barrier catches water when a dam forms anyway.

On older homes in Wooster Square and East Rock, we check whether the deck is board sheathing and how the original rafters carry load. Old framing is often sized differently from modern lumber. We measure it in the attic before we price the job. Our historic district roofing guide covers the added approvals some of those houses need.

Do I need ice and water shield on a new roof in New Haven?

Yes. Ice barrier underlayment is required here. We install it at the eaves and in the valleys on every roof replacement.

Can you put new shingles over my old ones?

We tear off on nearly every job. An overlay hides the deck. We can't find rot, seal the deck joints, or put ice barrier down at the eaves with old shingles still in place.

Will my roof framing hold the snow load?

We check it in the attic before we price the job. When a rafter or ridge is undersized, cracked, or sagging, we write the reinforcement into the estimate. Our cost factors guide explains how framing work changes the price.

Does the wind rating matter for a repair?

Yes. On a roof repair, we match the shingle and nail it to the same high-wind pattern as the rest of the roof. A patch nailed loose is the first piece to lift in a storm.

Do you work outside New Haven?

Yes. We also roof homes in Hamden, North Haven, Branford, Milford, and nearby towns.

Call (475) 381-2544 or contact us for a roof replacement or inspection in New Haven. Tell us how old the roof is, whether you've had ice dams or leaks, and how close the house sits to the water. We will inspect the roof and attic, check the framing and deck, and put the wind, snow, and ice work in writing before we start.