Home insulation in Mount Pleasant SC - even comfort from attic to floor

Most people call me about one room, usually the hot one upstairs or the room over the garage, and the cause often sits somewhere else, in gaps that attic air sealing closes. The price moves with how many spaces need work, whether old insulation has to come out first, how much sealing the house needs and whether you choose foam or loose fill. The schedule turns on those same things, plus how easy the attic and crawl space are to reach. At the estimate I'll tell you what I found and what I'd suggest, so you have a figure for your own house instead of a guess.

I start by walking the whole house with you, from the attic to the floors and the crawl space, because the room that feels worst isn't always where the heat gets in. Before we add anything, I look for trouble that changes the plan, such as old wiring, signs of water or fuel-burning appliances that need their air. On the job, our crew seals the gaps around can lights, pipes, wires and the attic hatch first, so the new insulation isn't fighting a draft, and keeps the eave vents clear so a vented attic can still breathe. We lay the insulation full depth right out to the edges, since that's where it's most often thin. Where there's a real choice, like a sealed or vented attic, I lay out the tradeoffs and let you decide.

Some houses need other work before or alongside the insulation. If what's up there now is soaked or full of droppings, insulation removal comes first, because new material laid over it only buries the problem. Under the floor, crawl space insulation takes some thought in a humid place like ours. Energy models have shown lower heating and cooling loads when a crawl space's venting is cut way back or its walls are insulated instead of the floor, but cutting that venting needs extra care where summers are warm and damp, so I look at how yours handles moisture before suggesting either.

Many houses here are elevated or sit over a crawl space, and Mount Pleasant's flood rules shape what we can do underneath them. Those rules cover new or substantially improved elevated and crawl space buildings, and they say any fully enclosed area below the design flood elevation, the flood height the town designs buildings around, has to let floodwater flow in and out and can't be finished living space. Under an elevated house, that enclosed space also can't be heated or cooled. So in a house these rules cover, we don't close in or condition the space below, and the insulation goes in the floor above instead.

We're based in Mount Pleasant and work in the cities around it, and we see the same humid summers, older lived-in houses and damp crawl spaces on jobs in Charleston and on James Island. Most of what we find up top is thin attic insulation, open gaps and old material that has been there for decades.