Professional installation that stops drafts, cuts heating costs, and makes your home comfortable again.
Hear from Our Customers
Your heating bill drops because heat stays inside where it belongs. No more cranking the thermostat to fight drafts from old, leaky windows.
You stop hearing every car that drives by. Modern windows cut outside noise so you can actually relax in your own home.
Your house feels the same temperature in every room. No more cold spots by the windows or rooms that never seem to warm up no matter what you do.
Sullivan Contracting has been installing windows in Connecticut homes for years. We know what works in our climate and what doesn’t.
We’re not the crew that shows up, slaps in some windows, and disappears. We handle the details that matter – proper flashing, weatherproofing, and making sure everything fits right.
You’ll find us right here in Connecticut when you need us. No chasing down out-of-state contractors or dealing with companies that vanish after they cash your check.
We start by measuring every window opening precisely. Old houses settle, and cookie-cutter measurements lead to gaps and problems later.
On installation day, we remove your old windows carefully to avoid damage to your walls or trim. We clean up the opening, check for any issues, and prep everything properly.
Then we install your new windows with proper flashing and weatherproofing. This isn’t just dropping a window in place – we’re sealing against Connecticut weather for the next 20 years. We test every window to make sure it opens, closes, and locks properly before we’re done.
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You get professional removal of your old windows and complete cleanup. We don’t leave you with a mess to deal with.
Every installation includes proper weatherproofing and flashing. This is what keeps water out and your energy bills down – and it’s where a lot of installers cut corners.
We handle any trim work needed to finish the job right. Your new windows will look like they’ve always been part of your home, not like an obvious replacement job.