Install Larson Storm Door: A Comprehensive Step-by-Step Guide
Learn to install a Larson storm door with a clear, step-by-step guide for homeowners. This tutorial covers sizing, prep, frame installation, weather sealing, and safety checks to improve comfort and energy efficiency.
Install Larson storm door by following a few careful steps: verify fit with your existing frame, remove the old door, prep the rough opening, install the storm door frame, attach weatherstripping and hinges, adjust for roll-in alignment, and test the door for smooth opening. Gather a drill, level, tape measure, ruler, and shims before you start.
Larson storm doors: fit and selection
Larson storm doors are designed to upgrade entryways with better insulation, improved weather resistance, and a cleaner aesthetic. Before you buy or install, verify the door is the right size for your opening and that the frame can accept the storm door's hinge and strike placement. Check your exterior trim and siding to ensure compatibility with mounting screws and weather seal. If you are replacing an old door, measure the rough opening in three places (top, middle, bottom) and note any out-of-square conditions. Record hinge locations on the frame and plan for swing direction (inward vs outward) based on local codes and traffic flow. If the existing frame is damaged or uneven, you’ll likely need to repair or replace it before installation.
Tools, prep, and safety
Gather the tools and materials you will use on installation day: a tape measure, a level, a drill with appropriate bits, screwdrivers, a hammer, a utility knife, shims, and weather sealant. Have protective gear on hand: safety glasses and gloves. Prepare the work area by removing plants, clearing the threshold, and laying a drop cloth to catch debris. If you are working at height, use a stable ladder or scaffold and have a helper to steady the frame during mounting. Read the Larson installation manual thoroughly and mark key reference points on the frame to avoid guessing during assembly.
Preparation steps for installation day
First, remove the existing door and any storm door hardware carefully, labeling screws to match when you reassemble. Clean and inspect the rough opening for cracks or rot; repair as needed and ensure the frame is square. Dry-fit the storm door frame without fasteners to confirm alignment. Mark the hinge locations and ensure there is even clearance from the floor to the bottom sill. Finally, pre-apply weather seal or foam compression on the inner edge to improve energy efficiency once mounted.
Energy efficiency and weather sealing considerations
Weather sealing is essential to prevent drafts. Use the manufacturer-provided weatherstripping and the compatible foam or vinyl seal around the door perimeter. Check the sill and threshold for gaps and fill with appropriate shims or sealants as needed. Adjust the hinges to ensure the door closes squarely and seals evenly. After installation, test with a paper slip test at all edges and fix any misalignment. Regular maintenance, including cleaning and reapplying weather sealant every few years, keeps performance high.
Authority sources
For best practices, consult official guidance and respected publications on doors, weather sealing, and home energy efficiency. Use these references to verify steps and materials before you start and to troubleshoot common fit issues.
Common pitfalls and maintenance tips
Common mistakes include rushing the dry-fit step, skipping proper squareness checks, and skimping on weather sealing. Take the time to verify measurements, use shims, and test the hinge alignment from multiple angles. Regularly inspect and reapply weather stripping; clean the door and frame to prevent binding and drafts.
Tools & Materials
- Tape measure(Minimum 25 ft; metric equivalents acceptable)
- Level(2-foot or longer for plumb checks)
- Drill with bits and screwdriver bits(Phillips and flathead bits; 3/16-in masonry bit if anchors are needed)
- Screwdrivers (Phillips and flathead)(Magnetic preferred)
- Hammer(For setting nails or tapping shims)
- Utility knife(Trim weatherstripping with precision)
- Shims(Wood or composite; for squaring the frame)
- Weather sealant/caulk(Silicone or polyurethane; exterior-grade)
- Safety glasses and gloves(Personal protective equipment)
- Ladder(Stable, tall enough for work height)
- Pencil(Mark reference points on frame)
- Caulking gun(For applying sealant smoothly)
Steps
Estimated time: 90-120 minutes
- 1
Measure the opening accurately
Measure width at top, middle, and bottom; record smallest dimension. Measure height on left, center, and right; record smallest. Confirm the opening is square by checking diagonals—the numbers should be close.
Tip: Have a helper hold the tape and cross-check diagonals for squareness. - 2
Remove existing door and hardware
Label screws and hardware as you remove them. Inspect the frame for rot or damage and set hardware aside for reuse if possible.
Tip: Take photos of hinge and latch positions before removal. - 3
Prepare rough opening and check fit
Clean debris; repair any framing damage. Dry-fit the storm door frame without fasteners to validate alignment and hinge placement.
Tip: Use shims to test different frame heights before fastening. - 4
Dry-fit the Larson frame
Place the frame in the opening; verify plumb and level across the verticals. Mark hinge locations on the frame and opening for precise alignment.
Tip: Do not fasten yet; adjustments are easier when unbolted. - 5
Secure the frame with shims and fasteners
With the frame in position, insert shims where needed and loosely drive screws to hold temporarily. Recheck plumb and level after each adjustment.
Tip: Avoid overtightening—misalignment can cause binding. - 6
Install weatherstripping and seals
Apply weatherstripping along the jambs and threshold per the Larson kit. Ensure continuous contact with the door edge for a tight seal.
Tip: Press seals firmly to prevent gaps; smooth out any kinks. - 7
Hang hinges and adjust alignment
Attach hinges to the door and frame; check door swing direction. Adjust hinge screws to align the door so it closes evenly without rubbing.
Tip: Check clearance at the top and bottom corners as you test swing. - 8
Test operation and finalize
Open/close several times; confirm smooth operation and secure latching. Apply exterior trim or casing if included, and perform a final weather seal check.
Tip: Run a draft test by feeling around perimeter after closing.
Got Questions?
Do I need to remove the entire existing frame or just replace the door?
Typically you replace the storm door in place, but some installations require frame adjustments or a new frame. Follow the manufacturer’s instructions and assess frame condition before proceeding.
In most cases you replace the door while keeping the frame, but check the frame condition first.
What tools are essential for installing a Larson storm door?
Common essentials include a tape measure, level, drill with bits, screwdrivers, a hammer, and weather sealant. Having a helper helps with alignment.
A level, drill, and measuring tape are essential; have help for steadying the frame.
Can a DIY installation void insulation or warranty?
Consult Larson’s warranty terms and your homeowner’s policy. Proper installation following the manual usually preserves warranty, and poor installation can void it.
Check the warranty terms; following the manual helps protect coverage.
How long does installation typically take?
Most installations take about 60-120 minutes depending on opening condition and scaffolding needs. Allow extra time for adjustments.
Expect about an hour or two, plus any needed framing work.
Will installing a storm door improve energy efficiency?
Yes, storm doors reduce drafts when properly installed with tight weatherstripping and a proper seal. The effect depends on your climate and door model.
A well-sealed storm door helps cut drafts and improve comfort.
Watch Video
Main Points
- Measure opening twice, install once
- Seal perimeter for energy efficiency
- Test door operation before final trim
- Maintain routine maintenance for longevity
