Main Beam & Girder Repair

Repair the backbone beneath the floor system with careful support, sequencing, bearing, and connection details.

Main beams and girders collect loads from many floor joists and deliver them to posts and foundations. Damage at one location can affect a much larger area of the home, so repair requires a planned temporary-support and load-transfer sequence.

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Signs this service may help

A long sag or ridge through several rooms
Multiple joists dropping at the same beam line
Crushing, splitting, or rot at post locations
Beam ends deteriorated near foundation pockets
Posts that lean, settle, or do not bear fully
Doors and walls shifting along the same interior line

How the repair comes together

Map the beam line: We document spans, loads, posts, footings, connections, damage, deflection, utilities, and access.
Create temporary support: Loads are safely carried while the affected beam sections and supports are repaired.
Reinforce or replace: The selected beam assembly is fitted with proper bearing, fastening, and post connections.
Transfer and verify: Loads are moved onto the repaired system in a controlled manner, followed by inspection and documentation.

What your repair may include

Built-up wood beam and girder repair
Localized splice or end repair when appropriate
Full or partial beam replacement
Post and connection correction
Temporary shoring and controlled load transfer
Moisture-source correction planning

From the field: Beam repair is a sequence, not a single cut

Because a main beam supports many joists, it cannot simply be removed and replaced like trim. Temporary supports must be placed where they can safely carry the load, utilities must be protected, and the new member must have reliable bearing from end to end.

Rot often concentrates at beam ends and post connections, where moisture and compression meet. We evaluate posts, pads, sill areas, and nearby framing so the repair does not transfer the problem to the next weak component.

The final scope identifies repair limits, support requirements, and any engineering or permit dependencies before installation begins.

Frequently asked questions

Can a rotted beam be patched?

Localized repairs are possible in some conditions, but the remaining wood, bearing, span, load, and connection details must support the method. Extensive or end damage may require partial or full replacement.

Do you lift the house during beam repair?

The structure may need limited, controlled adjustment to restore bearing and support. The safe amount of lift depends on the home's condition and the risk to finishes, utilities, and framing.

What happens to plumbing or wiring near the beam?

Utilities are documented during planning. Some can be protected in place; others may require temporary relocation by the appropriate licensed trade.

Can moisture control be installed after the beam is repaired?

Yes, and sequencing the work together is often efficient. Structural access comes first, followed by the liner, drainage, and humidity-control components that protect the repair.

Related services

Start with a clear diagnosis

Your inspection documents current conditions, likely causes, access constraints, and the repair sequence. You receive a written scope explaining what your home needs—and what it does not.

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Final repair limits, equipment, code requirements, and supporting trades are confirmed in the written proposal.# Crawl Space & Structural Repair Services

Protect what supports your home.

Sound Home Preservation helps homeowners across Greater Seattle and North Puget Sound solve crawl-space moisture, drainage, insulation, and structural wood problems with a clear inspection-first process.

Schedule a Free Inspection · Call or text 425-364-3420

Moisture Control

Crawl Space Encapsulation

Create a cleaner, drier space with a reinforced liner, sealed seams, and humidity control designed around your home.

Crawl Space Waterproofing

Find the path of recurring water and manage it with the right combination of drainage, sump equipment, sealing, and moisture control.

Crawl Space Drainage Systems

Capture water at vulnerable edges and low points, then direct it to a dependable discharge point.

Crawl Space Sump Pump Systems

Install a serviceable basin, correctly sized pump, check valve, and discharge route as part of a complete water-management plan.

Crawl Space Dehumidifier Installation

Control airborne humidity after bulk water and ground vapor have been addressed.

Crawl Space Insulation & Air Sealing

Improve comfort with an insulation approach that works with the crawl space's moisture strategy.

Structural Wood Repair

Repair damaged framing only after the moisture, pest, or loading issue that caused it has been identified.

Floor Joist Repair

Restore support where joists are cracked, notched, rotted, undersized, or pulling away from their bearings.