Allied Lafayette Spray Foam Insulation

Crawl space insulation in Lafayette IN - warmer floors and a crawl space that stays dry

Cold floors and a damp, drafty space under the house? We seal and insulate it in the right order so the rooms above stay warmer.

Reflective foil vapor barrier covers the floor and wraps around supports beneath large silver flexible ducts in a crawl space.

What does insulating a crawl space actually fix?

Crawl space insulation in Lafayette seals and insulates the space under your house, either along its walls or in the floor above it, so less cold and damp air reaches the rooms you live in.

Most people call me about a crawl space because the floors are cold in winter, the room over it smells musty, or there's old insulation hanging down between the joists. If that old material is wet or full of droppings, it has to come out first, so insulation removal is part of the job rather than an extra. The price moves with whether we do the walls or the floor, how much has to come out, how tight the space is to work in and whether an appliance down there needs changes, and the schedule moves with that same prep plus any permit review. On the estimate visit I go through the space with you and write out what I'd do and why.

How we do crawl space insulation

I start by crawling the space myself, because the first decision is walls or floor, and I won't make it until I've seen your vents, your pipes and anything down there that burns fuel, like a furnace or water heater. Our crew then clears out whatever the estimate flagged, since new insulation laid over a wet or dirty mess just hides the problem. Next we seal the gaps where pipes, wires and ducts come through, so the insulation isn't fighting a draft. If we're insulating the floor, it goes in snug against the underside of the floor with no gaps or crushed spots. If we're closing the space up, the ground and walls get covered against moisture first, and before anything is sealed we've already planned how the space will dry out and how those appliances will get their air.

Crawl space work usually ties into the rest of the house. If rooms still feel drafty once the floor is warm, the leaks are often higher up, and our air sealing services close the gaps around the attic hatch, outlets and the top of the foundation. Cold outside rooms can also point to thin or missing wall insulation, and I'll tell you on the visit if I think that's where your heat is going.

  • Sealed crawl space with insulated walls

    This suits a house with ducts, water lines or a furnace in the crawl space, because closing it up brings that equipment inside the warm part of the house. It takes more planning, since the space needs a way to dry out and any fuel-burning appliance needs its air worked out.

  • Insulated floor with the vents left open

    This suits a crawl space with little down there that needs protecting, or one where closing it up would mean replacing appliances. It's usually the simpler job, and the floor gets fitted tight between the joists so the cold stays below.

What Lafayette asks before crawl space insulation starts

Inside city limits, the City Engineer's Office issues building permits, and the city requires one for new construction and for any alterations, repairs or changes to an existing building. A residential review can take up to seven days, counted from when every required document is in, so that time comes before we can schedule. Before we book anything, I look up which office covers your address, since it can be the city, the county or another office. If the job needs a permit, we handle the paperwork and tell you what the office needs from you. For permitted work, the city may also ask general contractors for a $5,000 bond and electrical contractors for a City of Lafayette license.

We're based in Lafayette and work across the cities around it, and a lot of what we crawl into here is older houses with open foundation vents and a furnace or water heater sitting under the floor. We see the same mix on jobs in West Lafayette and Frankfort, so I check for those appliances before suggesting we close anything up.

Why call us for crawl spaces

  • I write every estimate myself

    I come out, crawl the space and write the estimate myself, and I still answer the phone, so you're talking to the person who actually saw your house. Our install crew does the work, and I check it over with you at the end.

  • Years of commercial work first

    I spent years spraying foam and blowing fill on warehouses, offices and new buildings for a big commercial outfit before I started this business in 2017. That's where I learned that the prep and the order of the work decide whether insulation does its job.

  • Licensed and insured on every job

    We're licensed and insured, so you aren't the one carrying the risk while our crew works under your house. Every job is backed by our satisfaction guarantee.

  • Another trade's job, we say so

    If radon reduction belongs in your plan, Indiana requires that work to be done by someone certified by the state health department, so I'll point you to a certified provider for that part. I'd rather send you to the right trade than bury a problem under new insulation.

Under a house, the order of the work matters more than the material. Request an estimate or call (765) 250-8263 and tell me what you've noticed upstairs.

(765) 250-8263

Get a written plan for your crawl space

I'll reply within one business day to set a time to come out, and the estimate is free, done at your house and comes with no obligation. If you can, tell us whether your crawl space has vents and what sits down there, like a furnace, a water heater or pipes, so I know what to look for.

Crawl space questions from Lafayette homeowners

Should I insulate my crawl space walls or the floor above it?

Building science guidance treats air sealing and insulating the crawl space walls as a best practice in any climate, though in some homes the floor above is the better layer to insulate. The rest of the job follows from that choice, so it's the first thing we settle with you.

How much does crawl space insulation cost in Lafayette?

The cost comes down to your crawl space, so I give you a number after I've seen it. Sealing and insulating the walls usually costs more than doing the floor, because it adds a moisture cover, more sealing and sometimes appliance changes. Heavy cleanup of old insulation raises the price, and a roomy, dry space that's easy to reach keeps it lower.

What happens to the furnace or water heater in my crawl space if it's sealed?

If a furnace or water heater with a natural draft vent gets its combustion air from open foundation vents, closing the crawl space means upgrading it, replacing it or changing how it gets air. That work belongs in the plan from the start. I sort it out before we seal anything.

How do I keep a sealed crawl space from getting damp?

A closed crawl space needs a way to dry out, and one of the most effective is a small amount of conditioned air from your heating and cooling system. That makes your system part of the plan, with the crawl space treated as part of the house. Sealing it also cuts the condensation that forms when humid air comes in through the vents and hits cold floor joists.

Can I insulate my own crawl space in Lafayette?

Yes, for a residential project that needs a Lafayette permit, you can do all the work yourself if you submit a copy of your homeowners insurance and live or plan to live in the house. Any plumbing still has to be done by a state licensed plumber.

What causes cold floors over a crawl space?

Usually it's outside air moving through open foundation vents and gaps in the floor, along with insulation that has fallen down or gotten wet. In a cold climate, sealing and insulating the crawl space can keep floors warmer and help protect pipes and heating equipment from freezing.

Get your crawl space and cold floors looked at

We take calls at (765) 250-8263 every day until 11 PM, so you can reach us after work or on a weekend.

A worker in protective gear sprays foam insulation into the framed wall cavities.
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