Mission does not adopt the siding section of the IRC as published. Section 500.043 omits R703.2 outright and Section 500.044 substitutes a Mission version requiring one layer of 15-pound felt complying with ASTM D226 Type 1, or another approved water-resistive barrier, applied over the studs or sheathing of all exterior walls, with the upper layer lapping the lower by at least 2 inches and joints lapped by at least 6 inches. Those are specific, inspectable numbers rather than a general performance requirement, and they are checked. Siding replacement is permit work here; the city's permit page exempts only minor non-structural exterior repairs.
What the work covers
- Tear-off to the sheathing wherever the existing wall assembly is questionable
- Sheathing repair, which is found rather than estimated
- Water-resistive barrier installed shingle-lapped so water is always directed out
- Flashing at windows, doors, penetrations, transitions and the roof-to-wall intersection
- Kick-out flashing where a roof edge meets a wall, the most commonly omitted detail in the trade
What we find in Mission homes
- An existing wall assembly whose water-resistive barrier cannot be confirmed until the old siding is off.
- Sheathing or studs that have to accept felt or an approved barrier lapped to Mission's stated dimensions.
- Trim, flashing and penetration details that the original cladding was detailed around rather than the new one.
- A licensing question, since siding falls under the county's wood framing class as well as the general building classes.
Working in Mission, KS
Mission is a small inner-ring suburb whose housing numbers need reading carefully. About 58 percent of the housing was built between 1950 and 1959, roughly 14 percent in the 1940s and another 11 percent in the 1960s, and only around 156 homes have gone up since 1970. The citywide median year built of 1973 sits later than the single-family stock actually is, because apartment construction in the 1970s and 1980s pulls the median forward: only 2,480 of about 5,600 units are single-family detached and the city as a whole is renter-majority. Permits are issued by the Community Development Department at 6090 Woodson Street and filed through GovBuilt, and the city's own Building Official does every plan review and every inspection rather than contracting the work out to Johnson County. Residential work is reviewed under the 2018 International Residential Code as adopted at Municipal Code Section 500.040, with the 2017 National Electrical Code. MrImproveIt carries the Johnson County Class C residential contractor licence that Section 505.040(C) requires before a permit issues.
How this job goes wrong
- New siding installed over a wall that is already wet, which hides the problem instead of fixing it
- Reverse-lapped weather barrier, which directs water into the wall rather than out of it
- Missing kick-out flashing, which reliably rots the wall below within a few seasons
Planning range
$18,000 to $55,000. Vinyl over a sound wall on a single-story house sits near the bottom. Fiber cement on a two-story with significant sheathing repair and complex trim sits at the top. Plan on two to five weeks depending on size, material and weather.
What moves the price on a siding replacement in Mission
Siding pricing in Mission turns on what is behind the old cladding, and that cannot be confirmed until it is off. The city's substituted R703.2 requires one layer of 15-pound felt to ASTM D226 Type 1 or another approved water-resistive barrier over the studs or sheathing of all exterior walls, so the barrier is a defined line item rather than an assumption. Sheathing repair is the variable underneath it and is quoted as its own decision point. Flashing and penetration details are the third line, because they were detailed around the original cladding rather than the replacement. Siding-only work is expressly exempt from the alarm retrofit trigger, so that line does not appear here.
Permits and inspections for this work in Mission
Siding replacement is permit work in Mission. The substituted R314.2.2 names siding replacement as permit work directly, and the city's permit page exempts only minor non-structural exterior repairs. The governing technical requirement is the substituted R703.2, with its 15-pound ASTM D226 Type 1 felt or approved water-resistive barrier and its 2-inch and 6-inch lap dimensions. On licensing, the Johnson County Class DW Wood Framing licence explicitly covers siding, and the Class A, B and C licences cover it as well; whichever applies, the contractor is named on the permit application exactly as on the occupation licence. We confirm current requirements with the department on every job.
Common questions about this work
Does siding need a permit in Mission?
Often yes, and exterior work is also the most likely to be subject to design or district review. Permit requirements are confirmed with the local building department before work starts.
Can new siding go over the old?
Sometimes it physically can, and usually it should not. Covering a wall means never seeing the sheathing, the barrier, or the damage under the old cladding.
What actually keeps water out?
The water-resistive barrier and the flashing, not the siding. The siding sheds most of the water; the layer behind it handles whatever gets past.
Siding questions from Mission homeowners
What does Mission require behind the siding?
The city substituted its own R703.2: one layer of 15-pound felt complying with ASTM D226 Type 1, or another approved water-resistive barrier, over the studs or sheathing of all exterior walls, with the upper layer lapping the lower by at least 2 inches and joints lapped by at least 6 inches. Those are inspectable numbers, not a general performance standard.
Does siding work trigger the whole-house alarm upgrade?
No. Mission's substituted R314.2.2 carries an explicit written exception for exterior-only work, and siding replacement is named in it alongside roofing, window and door replacement, and adding a porch or deck. Interior remodels and additions do trigger it; siding does not.
Which licence covers siding?
The Johnson County Class DW Wood Framing licence explicitly covers siding, and the Class A, B and C licences cover it as well. Whichever applies, the contractor has to be named on the permit application exactly as the occupation licence reads.
Call (913) 395-8571 or request a written estimate before any work starts.