Why does the per foot price only matter once I know my footage?
Because the spread between a $4 joint and an $8 joint is small next to the spread between 800 feet and 2,500 feet. Owners call us with a per foot number from our commercial caulking cost per foot table and no idea whether their building has a thousand feet of joints or four thousand. The footage is what turns a rate into a line in next year’s capital plan, and it is also what lets you compare bids. Two contractors pricing the same measured quantities give you numbers that mean something. Two lump sums for “the caulking” do not.
What am I actually measuring on a commercial building?
Four joint families, and each one carries a different rate. Precast and tilt-up panel joints are the long verticals between wall panels and the horizontals at floor lines. Window and door perimeters are the seal between frame and wall. Floor joints are the saw cuts and dock aprons on a slab. Parking garage expansion joints are an engineered system across the deck, priced like one. Walk each elevation, count, and multiply.
| Joint family | How to count it | Worked example (40,000 sq ft tilt-up) | Per foot, installed |
|---|---|---|---|
| Precast or tilt-up panel joints | Count the vertical joints per elevation, multiply by panel height. Add horizontal joints at floor lines. | 114 vertical joints x 24 ft = 2,736 LF, plus 400 LF at grade | $4 to $8 ground, $8 to $15 lift |
| Window and door perimeters | Perimeter of each opening (2 x width + 2 x height). Count every opening, including overhead doors. | 14 windows at 16 ft + 6 doors at 20 ft = 344 LF | $6 to $12 |
| Floor control and dock joints | Saw cut joints on the slab plan, usually a 12 to 15 ft grid, plus the dock apron joints. | 4 dock joints at 40 ft = 160 LF (interior slab deferred) | $5 to $10 |
| Parking garage expansion joints | Deck width times the number of expansion joint lines on each level. | Not on this building | $25 to $75 |
The worked example, step by step
The building is a 200 by 200 foot single story tilt-up warehouse off 45th Street, 24 foot panels on a 6 foot 6 inch module, built in the early 2000s and never resealed. Here is the takeoff.
- Vertical panel joints. 200 feet divided by 6.5 feet is about 31 panels per side, so 30 joints per long side and 30 per short side on a square plan, 120 joints total. Subtract the joints lost to overhead door openings, call it 114. Times 24 feet of height is 2,736 linear feet. Only the bottom 8 feet is ground reach, so about 900 feet prices at the ground rate and 1,800 feet prices at the lift rate.
- Horizontal joints. Single story, so only the panel to footing joint at grade, often buried or covered by paving. We checked, and it is exposed on two sides: 400 feet, ground rate.
- Openings. 14 office windows at 4 by 4 feet is 16 feet of perimeter each, 224 feet. Six overhead and man doors average 20 feet, 120 feet. 344 feet at the window and door rate.
- Dock joints. Four dock aprons with a 40 foot joint at the slab edge, 160 feet, floor joint rate. The interior slab control joints are a separate scope the owner deferred.
Totals: 1,300 feet of ground level panel joint at $4 to $8, 1,800 feet of lift work at $8 to $15, 344 feet of perimeter at $6 to $12, and 160 feet of dock joint at $5 to $10. That is $5,200 to $10,400 plus $14,400 to $27,000 plus $2,064 to $4,128 plus $800 to $1,600. Budget range: $22,500 to $43,000 for the full reseal. The owner can now decide whether to do the whole envelope this season or the south and west elevations first, which are the ones a dark panel face and the afternoon sun punish hardest.
What moves a joint inside its per foot range?
Joint width and old sealant condition, more than anything else. A half inch joint uses a quarter of the sealant a one inch joint does, and a bead that peels out in clean runs takes half the cutout labor of failed silicone smeared over polyurethane. Sealant joints are designed to a movement class under ASTM C920, and the width to depth rule in that standard is why a joint that was caulked too shallow last time has to be re rodded, which adds time. The federal Whole Building Design Guide is the plain reference for why joint design, not caulk brand, sets service life. Add Fargo’s temperature swing, documented by the National Weather Service office in Grand Forks, and a 24 foot panel is moving close to a quarter inch between January and July. That movement is what the per foot price is really buying: a joint sized and installed so it survives the cycle.
What to do with your takeoff
Send the footage by joint family to every bidder and ask each one to price those quantities per foot, with removal, backer rod and primer included. The bids will finally compare. If one comes in far under the math, the missing money is prep. Our guide to choosing a commercial caulking contractor covers the questions that expose that. For a full scope on a precast building, the precast panel caulking page shows what a complete reseal includes, and the cost guide has the per foot table these numbers came from. Every building is different, so the firm number is a free joint survey where we walk the elevations with a wheel and price your actual count.
Common questions about caulking footage
Does the per foot price include removing the old caulk?
On a proper bid, yes, and it should say so. Cutout and cleaning is about half the labor in a joint. A per foot number that quietly excludes removal is a topping over bid, and topping over fails in two or three Fargo winters.
How accurate does my footage need to be?
Within about 10 percent is plenty for budgeting. The contractor walks every elevation with a measuring wheel at the survey and prices the actual count. Your takeoff is there so you can tell a $9,000 range from a $30,000 one before anybody drives out.
Can I price only the worst joints?
You can, and the per foot rate goes up when you do, because mobilization and the lift get spread over fewer feet. Resealing a whole elevation while the lift is up is usually cheaper per foot and much cheaper per year than two spot repair visits.