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Top rated Crawl Space Encapsulation and Repair Services
Your crawl space is the area under your home. Most homeowners never see it. But what happens down there directly affects your floors, your air, and your wallet.
A wet crawl space causes wood to rot. It grows mold. It raises your heating and cooling costs. It draws in termites and rodents.
We fix all of that. Hanover Basement Waterproofing Pros seals crawl spaces in Hanover, PA and the surrounding York County area.
Five Reasons Hanover Homes Suffer from Crawl Space Moisture
Crawl spaces in this region stay wet for reasons tied directly to our local geography and weather. Here are the five most common causes we see on every job.
- Clay Ground That Will Not Drain The soil around Hanover holds water like a sponge. After rain, water does not drain down through the ground fast enough. This means it stays pressed against your crawl space floor and walls for days. The moisture then seeps through slowly and collects under your home.
- Low-Lying Land Near Penn Township Homes in Penn Township and McSherrystown sit close to low drainage basins. When heavy rain falls, groundwater rises up from below. This pushes water through crawl space floors that were never built to handle that kind of pressure.
- Stone and Block Foundations That Let Water In Many older Hanover homes were built on stone or concrete block footings. Those materials have small gaps and pores. Water seeps through them slowly. Over years, this leaves the crawl space floor permanently damp.
- Hot Summer Air Meets Cold Surfaces Hanover summers are hot and humid. When that warm outdoor air flows into a cool crawl space, it turns into condensation. Water then drips off the pipes, ducts, and wood beams onto the soil below. This is how mold starts.
- Open Vents That Let Outdoor Air In Older homes have open foundation vents. These were once thought to help air flow. Now we know they let in humid summer air and cold winter drafts. Both cause damage over time.
What Sets Our Crawl Space Crew Apart in Hanover
Many companies install a liner and leave. We take the job further. Here is what makes our process different.
- We Use a Twenty Mil Commercial Grade Liner A thin liner tears easily on rocks or rough ground. We use a twenty mil multi-ply liner rated for commercial use. It holds up for twenty years or more without cracking or shifting.
- We Treat the Wood Before We Seal the Space If there is mold on the joists before we seal the space, sealing it in makes the problem worse. We spray an antimicrobial formula on the wood first. This kills active mold and stops it from coming back.
- We Test the Dehumidifier Before We Leave We do not just install the unit and call it done. We run the machine and check the airflow readings before we close the job. This tells us the air will actually stay dry.
- We Give You One Flat Written Price We write the full cost before we start. The price does not change. If something unexpected comes up during the job, we tell you first.
- We Do Not Use Outside Crews Our own licensed technicians do every step of every job. You will not see a different crew show up on day two.
Crawl Space Services We Provide in Hanover, PA
Every crawl space is different. We assess yours first and then choose the right combination of services for your specific situation.
Vapor Barrier and Ground
Liner Setup
The dirt floor of a crawl space releases moisture constantly. This vapor rises up into the wood structure of your home. We stop this by laying a twenty mil multi-ply polyethylene crawl space liner directly over the ground.
We seal every seam with a multi-ply polyethylene liner heat weld sealing iron so no air or moisture passes through the joints. This liner stays flat and tight against the walls and columns. This installation follows the moisture control standards in International Residential Code (IRC) Section R408.3 for unvented crawl space assemblies.
Rim Joist and Wall Insulation
Cold air sneaks into your home through the rim joists and crawl space walls. This makes your floors cold in winter and drives up your heating bill. We cut and fit extruded polystyrene rigid foam insulation boards along the interior walls and rim joist spaces.
Our crew measures foam thickness using an ultrasonic insulation thickness gauge at multiple points to confirm coverage is even. This step meets the thermal resistance rules in International Residential Code (IRC) Section N1102.2.11 for crawl space wall assemblies.
Crawl Space Dehumidifier Setup
After the space is sealed, moisture can still build up from the ground and walls. A good dehumidifier pulls that moisture out of the air and drains it automatically. We install a commercial grade self-draining unit rated for the square footage of your crawl space.
We confirm the airflow output using a digital vane thermo-anemometer airflow meter to make sure the unit is moving enough air. This keeps relative humidity below fifty percent. The installation meets the mechanical ventilation rules in International Residential Code (IRC) Section M1505.4.
Interior Drainage and Sump Basin Setup
Some crawl spaces have active water intrusion. Rain or groundwater collects on the floor and stays there. We dug a trench around the inside perimeter, laid a drainage channel, and set a heavy duty cast iron submersible sump pump inside a sealed basin.
Before we finish the wiring, we test the pump motor with a submersible pump motor insulation megohmmeter to verify there are no electrical faults. The water then gets pumped out and away from your foundation. This drainage system meets the standard in International Residential Code (IRC) Section R405.2.3 for crawl space floor drainage.
Wood Treatment and Pest Barrier Application
Mold spores and wood-boring insects thrive in damp, dark crawl spaces. Before we seal and insulate, we apply an antimicrobial borate wood preservative solution to every joist, beam, and post. This formula kills existing mold and stays active in the wood to stop future growth.
We apply the solution using a high-volume low-pressure airless disinfectant sprayer to reach every corner and crevice. This step also creates a barrier against termites and carpenter ants. This application follows the termite protection requirements in International Residential Code (IRC) Section R318.1.
How We Work Through Your Crawl Space Job
This is the order we follow on every project from the first day to the last.
Debris and Wet Material Removal
We start by clearing out old insulation, rocks, trash, and anything else left behind.
Drainage Trenching
Next, we dig channels around the inside perimeter and set the sump basin where needed.
Wood Treatment Spray
Then, we apply the antimicrobial formula to all wood surfaces and let it dry.
Liner Anchoring
After that, we roll out the twenty mil liner, cut it to fit, and weld all the seams shut.
Wall and Rim Joist Insulation
Next, we press and seal the foam insulation boards against the walls.
Dehumidifier Start-Up
Finally, we install the dehumidifier, run the airflow test, and confirm the humidity readings.
Quick Service Request
Get a Free Crawl Space Look Today
A damp crawl space does not fix itself. The damage builds up month after month. A quick inspection now can save you a much larger repair cost later.
Call us to set up your free visit. We check the moisture levels, look at the wood condition, and tell you exactly what we find in plain language. Then we give you a written price before we start anything.
Hanover Basement Waterproofing Pros 1 Center Square, Hanover, PA 17331 Phone: (717) 282-9221 Office Hours: 8:00 AM to 8:00 PM Monday through Friday, 9:00 AM to 5:00 PM Saturday, 10:00 AM to 5:00 PM Sunday
Questions Crawl Space Owners Ask Us in Hanover
My crawl space does not flood. Do I still need a vapor barrier?
Yes. You do not need standing water for moisture damage to happen. The dirt floor alone releases enough vapor to cause wood rot and mold over several years. A liner stops this at the source.
How do I know if my crawl space has a moisture problem right now?
Look for these signs in your home. Your floors feel spongy or soft. Your home smells musty, especially in the morning. Your hardwood floors are starting to cup or bow. You see mold or dark staining on your floor joists when you look under the access panel.
Will sealing the crawl space lower my monthly energy bills?
Yes. When you seal the crawl space, cold winter air stops leaking into your floors. Hot summer air stops getting trapped below the home. This means your heating and cooling system runs less. Many homeowners report lower bills within the first few months.
How long does the encapsulation work last?
A twenty mil liner installed by a trained crew lasts twenty years or more. We seal the edges to columns and walls so the liner stays flat and does not shift.
Can you fix a crawl space that already has standing water in it?
Yes. We handle active water first. We dig a perimeter drainage trench and install a sump basin before we do anything else. Next, we pump out the standing water. After the floor is dry, we move forward with the liner and insulation.
Do I have to leave my home while you work on the crawl space?
No. You can stay in your home the whole time. Our crew works in the crawl space below the floor. We do not need access to your living areas. Most jobs wrap up within one to two days.
Will the mold and pests come back after you treat the wood?
Not if the space is properly sealed and dry. Mold and insects need moisture to survive. When the crawl space stays below fifty percent humidity, conditions are no longer suitable for them. Also, the borate wood treatment stays active in the wood fibers for years after the job is done.
What if my dehumidifier stops working after the job is finished?
Call us. We stand behind the equipment we install. If the unit has a problem within the warranty period, we come back and sort it out. Also, most commercial grade dehumidifiers we install carry their own manufacturer warranty. We walk you through that coverage before we leave on the final day.