Central Pennsylvania Spray Foam, Attic Blown-In, Fiberglass Batt, Air Sealing and Blower Door Testing .
If your home feels drafty, unevenly heated, or expensive to keep comfortable, your walls may be the problem. At Draft Stoppers Insulation, we specialize in exterior wall dense packing for homes across Central Pennsylvania, helping homeowners reduce energy loss, improve comfort, and lower utility bills—without tearing out drywall.
We proudly serve customers in Dauphin County, Cumberland County, Perry County, Juniata County, Mifflin County, Snyder County, Centre County, Blair County, Franklin County, Fulton County, Huntingdon County, Union County, and surrounding areas, including cities like Harrisburg, Mechanicsburg, Camp Hill, Carlisle, Lewistown, Mifflintown, Selinsgrove, State College, Altoona, Chambersburg, and Newport.


Exterior wall dense packing is a professional insulation technique that fills empty or under-insulated wall cavities with tightly packed insulation material—typically cellulose or fiberglass—from the outside of your home. This method allows us to:
Unlike traditional insulation projects that require drywall removal, exterior dense packing is minimally invasive and highly effective.
Many older homes in Central PA were built with little to no wall insulation. Even newer homes can suffer from poorly installed batts or air gaps that allow heat to escape. Dense packing solves these problems by creating a continuous, compact thermal barrier inside your walls.
Benefits include:
Lower Energy Bills
By stopping air infiltration and heat loss, your HVAC system doesn’t have to work as hard—leading to noticeable energy savings.
Improved Comfort
Say goodbye to cold walls, drafts, and uneven temperatures between rooms.
Noise Reduction
Dense-packed insulation dampens outside noise from traffic, neighbors, and wind.
Better Indoor Air Quality
Sealing wall cavities helps prevent dust, allergens, and outdoor pollutants from entering your home.
Eco-Friendly Options
Cellulose insulation is made from recycled materials and is one of the greenest insulation choices available.
Draft Stoppers is a trusted local insulation contractor serving Central Pennsylvania. We understand the region’s climate, housing styles, and energy challenges—from historic homes in Lewistown and Carlisle to modern builds in State College and Mechanicsburg.
Homeowners choose us because:
We are fully licensed and insured
We specialize in air sealing and insulation
We use professional-grade materials
We focus on long-term energy performance
We offer honest, no-pressure recommendations
We provide free inspections and estimates
Not sure if your home needs wall insulation? Look for these common symptoms:
If you’re experiencing any of these, dense packing may be the solution.
We proudly provide exterior wall dense packing services throughout:
Dauphin County: Harrisburg, Hummelstown, Middletown
Cumberland County: Mechanicsburg, Camp Hill, Carlisle
Perry County: Newport, Marysville
Juniata County: Mifflintown, Port Royal
Mifflin County: Lewistown, Burnham
Snyder County: Selinsgrove, Shamokin Dam
Centre County: State College, Bellefonte
Huntingdon County: Huntingdon, Mount Union
Union County: Lewisburg, Mifflinburg