Phosphate Capital of the World
Spray Foam Insulation in Mulberry, FL
An old mining town with older homes and plenty of steel buildings.
- Free on-site estimates
- Written quote with material, depth and R-value for each area
- Roof leaks, pests and wiring checked before anything is covered
Insulating a Mining Town
Spray Foam Insulation in Mulberry works in a small city that calls itself the Official Phosphate Capital of the World. Phosphate rock was discovered in the Peace River in 1886, and the town grew around the industry; the Bone Valley around it is the world's most productive phosphate rock mining area, and the Mosaic Company runs the Nichols mine about two miles east of town. Badcock Home Furniture opened its first store here in 1904.
Older homes
The 2020 census counted 3,952 residents and 1,936 housing units, with a median age of 46. Many Mulberry homes are older, with thin attic insulation and walls that were never filled. Sealing the attic and blowing it to at least R-38, Florida's code figure for ceilings, is usually the first step.
Metal buildings
In a mining and industrial area, steel shops and storage buildings are common on residential and commercial lots. Closed-cell foam on the roof and walls stops condensation and cuts the heat that builds up under the sun.
Code and climate
Polk County is in climate zone 2A. The Department of Energy suggests R-49 to R-60 for an empty attic in zone 2, or adding R-38 to R-49 over 3 to 4 inches already there.
Lakeland Electric customers
Parts of unincorporated Lakeland border Mulberry on the north. If Lakeland Electric is your utility, its $300 attic rebate applies when the attic starts at R-19 or less and finishes at R-30 or more, with a pre-inspection.
Get a free estimate or call (863) 341-8561 to book a visit in Mulberry.
What to Know in Mulberry
- Phosphate capital. Phosphate rock was found in the Peace River in 1886; the Mosaic Nichols mine is about two miles east of town.
- Housing. The 2020 census counted 3,952 residents and 1,936 housing units, 12.9% vacant, with a median age of 46.
- Code ceilings. Florida's 8th Edition energy code lists R-38 for ceilings in climate zone 2.

Mulberry Questions
Do you serve Mulberry?
Yes, it is in our Polk County service area.
Can you insulate a steel building on my property?
Yes. Closed-cell foam on the roof and walls cuts heat and stops dripping.
Does the Lakeland Electric rebate apply to me?
Only if Lakeland Electric is your electric utility and your attic meets its starting and finished R-value rules.
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