Where the house meets the foundation
Basement & Rim Joist Insulation in Holland, MI
The band of wood above your foundation leaks more air than most people think.
- Free on-site estimates in Holland and nearby towns
- Written quotes that name the foam, the depth and the R-value
- Roof leaks, wet sills and old wiring flagged before anything is covered
Drafts Start at the Rim
Basement & Rim Joist Insulation starts at the rim joist, the band of lumber that sits on top of the foundation and holds up the floor. In most Holland basements it is bare wood or covered with a loose batt, and outside air comes in at the sill, around the joist ends and through gaps in the band. That cold air sinks to the basement floor, makes the first floor cold underfoot, and gets pulled up through the house as warm air leaves at the top.
Why closed-cell foam fits
Closed-cell foam sprayed directly onto the rim and sill seals the gaps and insulates in one step. At R-5 to R-7 per inch (HomeGuide), two or three inches gives a solid R-value in a narrow bay, and it keeps humid indoor air from reaching the cold wood, which is what causes the condensation and mold that show up behind batts. It is fast, too: most basements are done in a day.
Before you finish the basement
If you are finishing a basement, the best time to insulate the walls is before the framing goes up. Closed-cell foam on the concrete, or rigid foam sealed at the seams, keeps damp air off the cold wall. Fiberglass batts against bare concrete, a common shortcut, can trap moisture against the wall. The 2021 IECC lists R-15 continuous, R-19 in the cavity, or R-13 plus R-5 continuous for Zone 5 basement walls, and your building department will tell you which code applies to your permit.
Radon and water
State figures from Michigan EGLE estimate that about one in four Michigan homes has radon above the federal action level, mostly entering through foundation cracks and sump pits, and EGLE says sealing alone is rarely a lasting fix. Insulating a basement does not deal with radon or water, so if you have either, we recommend testing and repair before the walls are covered.
Bigger houses, longer rims
Newer homes in Holland Charter Township and the subdivisions around Zeeland and Hudsonville have long rim joists, walkout walls and cantilevered floors. Each of those is a leak path, and each is easy to reach before a basement is finished.
Call (616) 801-4092 or book a visit and we will measure your rim and walls. Get a free estimate
What This Covers
Where basement insulation goes.
Rim joist foam
Closed-cell on the band joist and sill all the way around.
Foundation walls
Closed-cell on concrete before framing goes up.
Cantilevered floors
Foam under bump-outs and overhangs that feel cold.
Walkout walls
Insulating the above-grade framed sections of walkouts.
Published Rim Joist and Foundation Costs
| Job | Range and source |
|---|---|
| Rim joists, spray foam | $2,000 to $2,500 (HomeGuide) |
| Closed-cell, installed | $3.00 to $5.00 per sq ft (HomeGuide) |
| Closed-cell on crawl space walls | $2 to $5 per sq ft (HomeGuide) |
| Crawl space, spray foam | $2,000 to $4,000 (HomeGuide); $1,000 to $5,900 (Fixr) |
| Typical spray foam minimum | $1,000 to $2,000+ (HomeGuide) |
HomeGuide (2026) and Fixr (2025) national figures. The length of the rim, wall height, obstructions such as ducts and wiring, and foam depth set the total. You get a written estimate after we measure, and the estimate is what you pay.
How It Works
1. Measure
We measure the rim and wall area and note ducts, wiring and water signs.
2. Written plan
Foam type, depth and price for the rim and any walls.
3. Prep
Batts and debris are removed and the area is covered and ventilated.
4. Spray
Foam goes on to depth, with any required barrier noted.
Why Choose Us for Basement & Rim Joist Insulation
A one-day job
Most rim joists are done in a single visit.
Moisture noted
We point out damp walls and sump issues before we start.
Code-aware
We tell you what your building department may ask for.
Basement & Rim Joist Insulation Questions
How thick should rim joist foam be?
Two to three inches of closed-cell is common, which gives about R-10 to R-21 using HomeGuide's R-5 to R-7 per inch. We write the thickness on the estimate.
Can I leave the old batts in the rim?
We usually pull them out. Foam needs to stick directly to the wood to seal it, and batts often hide moisture or mice.
Do I need a permit to insulate my basement?
Finishing a basement usually needs a permit; insulating a rim joist on its own often does not. Your local building department makes that call, and we can tell you what they typically ask for.
Does foam on the walls stop basement moisture?
Closed-cell foam keeps humid indoor air off the cold wall, which stops condensation. It does not stop water leaking through the foundation, which needs to be fixed first.
Basement & Rim Joist Insulation Service Areas
- Spray Foam Insulation in Holland, MI
- Spray Foam Insulation in Zeeland, MI
- Spray Foam Insulation in Holland Charter Township, MI
- Spray Foam Insulation in Park Township, MI
- Spray Foam Insulation in Laketown Township, MI
- Spray Foam Insulation in Saugatuck, MI
- Spray Foam Insulation in Douglas, MI
- Spray Foam Insulation in Fennville, MI
- Spray Foam Insulation in Grand Haven, MI
- Spray Foam Insulation in Spring Lake, MI
- Spray Foam Insulation in Hudsonville, MI
- Spray Foam Insulation in Jenison, MI
- Spray Foam Insulation in Allendale, MI
Get a Basement & Rim Joist Insulation Estimate
Free rim joist estimates in the Holland area.