Crawl space damaged by water leakage is a common problem, especially in many single family homes in Europe and America. Crawl Space is located at the bottom of a house, between the foundation and floor, and is generally not high enough to stand, but leaves some space for ventilation and maintenance.

 

The reason why the crawl space is prone to water ingress

Low lying terrain

Crawl spaces are usually underground or near the ground, and if the drainage design around the building foundation is poor, rainwater or snowmelt can easily flow in.

Surface water infiltration

The drainage slope of the yard is insufficient, and the rainwater will infiltrate into the crawl space along the foundation wall during a rainstorm.

High groundwater level

In areas with high groundwater levels (such as near rivers and lakes), groundwater is prone to seep into the crawl space surface.

Leakage through ventilation openings/gaps

Poor sealing of walls or ventilation openings can cause heavy rain or accumulated water to directly flow in.

Pipeline rupture or condensation water

In winter, pipeline freezing and cracking or poor drainage of air conditioning condensate can also lead to water accumulation in crawl spaces.

 

 

Crawl space water inlet treatment plan

1. Drainage and waterproofing measures

External drainage of the foundation: Ensure that the ground around the house has a slope, allowing rainwater to naturally move away from the foundation.

Drainage ditch&French Drain: Install a drainage system around the foundation to guide rainwater flow away.

Waterproof coating: Apply a waterproof layer on the outside of the crawl space wall to reduce water seepage.

2. Internal drainage and pumping system

Sump Pump+Sump Pit: A sump is installed at a low point in the crawl space to automatically drain accumulated water.

Drainage pipe network: connected to outdoor drainage ditches to avoid water retention.

3. Moisture prevention measures

Laying Vapor Barrier: Lay thick polyethylene film on the ground and walls of the crawl space to isolate soil moisture.

Sealed ventilation opening: Close or modify traditional ventilation openings to prevent humid air from entering.

4. Dehumidification and Air Management

install a crawl space dehumidifier to maintain humidity below 50%~60% to prevent mold growth.

Air circulation: Some houses will install a whole house dehumidification system with ducts to transport dry air throughout the entire house.

5. Pipeline and facility inspection

Regularly inspect the water supply and drainage pipelines to prevent rupture or condensate overflow.

Insulate the pipeline to prevent freezing and bursting in winter.

 

Why choose the Preair VT70E dehumidifier?

The VT70E dehumidifier provided by Preair is specifically designed for crawl spaces, with a compact body and handles that do not take up space.

The machine adopts side air intake, which improves dehumidification efficiency.

The machine with a capacity of 70PPD (26.7℃/60% RH) can continuously drain water, but there is no water pump.

The price is cheap, making it one of the most cost-effective machines in its class.

Easy to install, buyers can install it themselves according to the instructions.

Long term warranty, free replacement and repair within one year.