PRIS Concrete builds foundation additions in Houston
Add living space with a foundation that ties in right and holds up. We drill and pin to the existing structure, set proper elevations, reinforce where needed, and pour clean, strong concrete that matches your home.
Why homeowners and builders choose PRIS Concrete
You get clear pricing, a consistent schedule, and a team that shows up ready to work. We set proper grades, reinforce where needed, and finish with care so your concrete looks good and holds up in Houston weather. We keep you updated from start to finish and walk the job with you before and after the project.
What you get with a PRIS foundation addition
- Layout and formwork to plan
- Tie-ins to the existing slab or grade beams with drilled dowels
- Subgrade grading and compaction for a stable base
- Vapor barrier where required by plan or code
- Reinforcement sized to spans and loads
- Footings, beams, and thickened edges as specified
- Accurate elevations and slopes at doors and drains
- Anchor bolts, hold downs, and embeds set to spec
- Clean strike off and a flat, uniform finish ready for framing
If you plan to build outdoor living off the new space, visit the Concrete Patios page to see finishes that pair with structural slabs. If the site needs grading or access first, the Site Prep and Excavation page explains how we set a proper base before any pour.
Common foundation addition projects
Room additions
Bedrooms, offices, and family rooms that match your existing finished floor height. We drill and pin into the old slab or beam, then pour to a smooth transition at doorways.
Garage conversions and expansions
Tie a new slab into the existing footprint for extra parking or enclosed space. We confirm door openings, curb details, and reinforcement for expected loads.
Porch and sunroom foundations
Clean pours with moisture control and accurate elevations so windows, doors, and finishes install without surprises.
Utility and equipment pads
Pads for HVAC, generators, and water systems that sit level and anchor correctly. We size thickness and reinforcement to the equipment weight.
If part of the old foundation has failed, the Repair and Replace Existing Concrete page covers full tear out and rebuild options that correct the root cause.
Our foundation addition process
Plan
We meet on site, review drawings, measure, check access, and map drainage. You get a written scope and schedule before work begins. We confirm inspection steps with the builder.
Prep
We set forms to plan, grade and compact the base, place moisture barrier where required, and install reinforcement and dowels. We confirm elevations and thresholds to match finished floors.
Pour and finish
We place the correct mix and thickness, strike off, bull float, edge, and finish to the tolerance needed for flooring. We cut or saw joints at the right spacing and isolate where the plan calls for it.
Protect and clean up
We set curing and protection steps, remove forms, backfill edges, and haul debris. We review care so the slab reaches design strength and stays clean for framing.
Details that protect your addition
- Proper dowel drilling and epoxy for solid tie-ins
- Beam depth and spacing to match plan loads
- Moisture barrier or capillary break to protect flooring
- Control and isolation joints at the right locations
- Accurate anchor bolt layout for a clean framing start
- Access planning so trucks and equipment do not disturb the base
If your addition supports heavy equipment or long spans, we can review thicker sections, higher strength mixes, and reinforcement upgrades during the site visit.
Finishes and options
For decorative concrete adjoining the addition, see the Stamped Concrete and Concrete Patios pages for patterns and borders that frame the new space.
Steel trowel finish for interiors that receive flooring
Broom finish for exterior edges and entries
Blockouts for plumbing, electrical, and mechanical
Sleeves and conduits for future utilities
Surface hardeners and sealers where specified
What to expect
- Line item estimate with clear pricing
- Start date and daily updates from your project lead
- Coordination with builder, framer, and utilities
- Respectful teams and a tidy job site
- Final walkthrough and maintenance tips
Serving Houston neighborhoods
We install and repair expansion joints across Houston, including River Oaks, Memorial, Galleria and Uptown, West University, Bellaire, Tanglewood, and other neighborhoods.
Visit the Areas Served page to choose your area and view nearby projects in the Projects gallery.
FAQs
What is the difference between control joints and expansion joints
Most additions require plans and permits. We can work from your engineer’s drawings and coordinate with your builder on inspections. We follow plan and code on all structural details.
How do you tie into the existing slab
We drill and epoxy dowels into the existing slab or beam at the spacing your plan calls for. We set forms and reinforcement so the new pour locks in without creating weak points.
Will the new floor match the old floor height
Yes. We set elevations to match finished floors unless the plan calls for a step or transition. We confirm thresholds at doors and wet areas.
How long before framing can start
Light foot traffic is usually fine after one to two days. Framing often starts after several days depending on weather and mix design. We confirm timing for your job.
What causes cracks in additions
Concrete moves with temperature and soil. Proper base prep, joint layout, reinforcement, and curing help control where cracks form and how they behave. We build to reduce random cracking.
What affects price
Square footage, thickness, reinforcement, access, moisture barrier, beams and footings, embeds and anchors, and any special finish or tolerance. Your estimate shows each item so you can see where the cost comes from.
