# What Pier-and-Beam Repair Involves > Pier-and-beam repair explained: piers, beams, joists, crawlspace clearance, and what repair addresses in older Austin homes. URL: https://austinfoundationrepair.net/guide/what-pier-and-beam-repair-involves/ Last-Modified: 2026-09-16 Explainer # What Pier-and-Beam Repair Involves Pier-and-beam repair explained: piers, beams, joists, crawlspace clearance, and what repair addresses in older homes. Published September 16, 2026 · 5 min read ![Crawlspace view of wood beams, joists and masonry piers under an older Austin home](/images/featured/crawlspace-view-of-wood-beams-joists-and-masonry-p.webp) ## The parts and how they work together Pier-and-beam repair [/pier-and-beam-repair/ →](/pier-and-beam-repair/) starts with understanding a system rather than a single element, so it is worth naming the pieces. **Piers** are the vertical supports, usually masonry or concrete, sitting on footings in the ground. They carry the load down to soil. **Primary girders** are the substantial horizontal wood members spanning between piers. They collect the load from above and deliver it to the piers. **Floor joists** run across the girders at regular spacing and carry the subfloor, which carries your finished flooring. **Sill plates** connect framing to the perimeter stem wall, the low masonry or concrete wall that encloses the crawlspace around the outside of the house. **Crawlspace clearance** is the vertical space between the soil and the underside of the framing. It determines what work is practical down there and how well the space ventilates. ![Perimeter stem wall and crawlspace vent of an older Central Texas bungalow seen from outside](/images/content/perimeter-stem-wall-and-crawlspace-vent-of-an-olde.webp) ## What repair typically addresses Three overlapping areas, and a good proposal separates them. **Support correction.** Piers that have settled, posts that have shifted or rotted at the base, shims that have worked loose, or locations where a support has lost contact with the girder entirely. Sometimes additional support is added where spans are excessive. **Structural repair.** Girders or joists with fungal decay, termite damage or excessive deflection. Depending on the extent, that means sistering a new member alongside the existing one or replacing a section outright, with temporary support carrying the load meanwhile. **Moisture management.** Vapour retarders, drainage correction and ventilation. This is not cosmetic. Crawlspace humidity is what damages the wood in the first place, and repairing framing without addressing it means watching the same thing happen again. ![Adjustable support post seated under a wood floor beam in a crawlspace with shims on the pier cap](/images/content/adjustable-support-post-seated-under-a-wood-floor-.webp) > **Wood condition comes before elevation** > > Adjusting a floor supported by a decayed girder just relocates the problem. Any competent assessment establishes what the framing can carry before anyone discusses leveling. ## How adjustment works Leveling on pier-and-beam is mechanical and incremental. **Shims** are added at pier caps to raise a girder a controlled amount. **Screw-jack posts** provide adjustable support that can be fine-tuned. Temporary cribbing and jacks carry the load while permanent support is set. The significant advantage is that this is reversible and checkable. You are not driving anything permanently into the ground; you are adjusting support you can see and reach. The constraint is the house above. Plaster, tile, plumbing connections and door and window frames have settled into their current positions, sometimes over a century. Adjustment happens in increments with checks between them, and the target is a realistic tolerance rather than a flat plane. ## How it compares with slab repair | | Pier-and-beam | Slab-on-grade | | --- | --- | --- | | Access | Crawlspace hatch | Excavated pits, sometimes interior | | Adjustment | Shims and adjustable posts | Installed supports and load transfer | | Key materials | Wood framing, masonry piers | Reinforced concrete | | Main environmental risk | Crawlspace humidity, decay, termites | Soil moisture change, under-slab leaks | | Reversibility | High | Low | | Plumbing access | Accessible in crawlspace | Beneath concrete | ## Is your home pier-and-beam? Almost certainly, if it has a raised floor with a crawlspace hatch or vents around the base. Most Austin homes built before about 1960 are, and some later homes on sloped lots use it too. Occasionally a house has both systems where an addition was built differently, which is worth knowing before anyone assesses it. If your floors feel soft or you have noticed a musty smell, the crawlspace is where the answer lives. Our guide on crawlspace moisture, wood rot and sagging joists [/guide/crawl-space-moisture-wood-rot-sagging-joists/ →](/guide/crawl-space-moisture-wood-rot-sagging-joists/) covers what that usually means. ## Frequently Asked Questions ### What is a pier-and-beam foundation? A raised foundation where piers carry wood girders, girders carry floor joists, and joists carry the subfloor, with an accessible crawlspace beneath. It is common in Austin homes built before roughly 1960, particularly in Hyde Park, Clarksville, Travis Heights and older East Austin neighbourhoods. ### How is it different from a slab? A slab is one continuous concrete element poured on the ground. Pier-and-beam is a framed system of wood members on piers, with a crawlspace underneath. That means repairs and moisture behave completely differently, and assessment looks at wood condition as much as at elevation. ### Is pier-and-beam better or worse than slab? Neither, they have different characteristics. Pier-and-beam offers accessible plumbing and mechanically adjustable support. It also introduces wood and crawlspace humidity as maintenance concerns that slab homes do not have. The right question is what condition your specific foundation is in. ## Related Guides ### Crawl Space Moisture, Wood Rot, and Sagging Joists How crawlspace humidity leads to wood rot and sagging joists in Austin pier-and-beam homes, and why moisture ties to structure. [Crawl Space Moisture, Wood Rot, and Sagging Joists →](/guide/crawl-space-moisture-wood-rot-sagging-joists/) ### Pier-and-Beam Leveling: Objectives and Limitations What pier-and-beam leveling can and cannot achieve: shimming and jack-post adjustment, realistic tolerances, and access. [Pier-and-Beam Leveling: Objectives and Limitations →](/guide/pier-and-beam-leveling-objectives-and-limitations/) ### Signs Your Pier-and-Beam Foundation Needs Work Recognise pier-and-beam warning signs: sagging and bouncy floors, gaps, and crawlspace moisture cues, plus what to document. [Signs Your Pier-and-Beam Foundation Needs Work →](/guide/signs-your-pier-and-beam-foundation-needs-work/) ### What Affects the Cost and Scope of Pier-and-Beam Repair Cost and scope drivers for pier-and-beam repair: number of supports, girder and joist condition, moisture work and access. [What Affects the Cost and Scope of Pier-and-Beam Repair →](/guide/what-affects-pier-and-beam-repair-cost-and-scope/) ## Learn more about Pier-and-Beam Repair If this guide raised a question about your own property, the pier-and-beam repair page explains what we look at and what happens after an enquiry. Pier-and-Beam Repair [/pier-and-beam-repair/ →](/pier-and-beam-repair/) Request a Quote [/request-quote/ →](/request-quote/)