Tamalpais Valley

Flood damage restoration service – Tamalpais Valley

Homeowners in Tamalpais Valley suffer water damage on a regular basis. Whether you’ve experienced a natural disaster or a localized catastrophe such as a water line breakage, Critical Control is standing by to respond 24/7.

The most common cause of water damage is when water gets into a structure or house via a flood, storm or burst pipe. Sometimes the damage is apparent and obvious. Sometimes, the damage is subtle or under-reported.

It’s more difficult than just drying the interior of the building to repair water damage. With modern professional methods for water damage restoration typically restorers such as Critical Control can mitigate damage that, in the past, would have required complete structural replacement, that is to say, in the sense of demolish and rebuild.

Water Damage Restoration Guidelines Exist and you can call a Professional

Many times, homeowners or builders try to fix water damage by using DIY solutions found on the internet. This isn’t a good idea. There are guidelines to deal with water damage and they require the skills and tools of professionals. These guidelines can be available in the IICRC Standard Reference Guide, or Professional Water Damage Restoration book. This guide is necessary to ensure that there is a professional standardisation for instances involving water damage to houses or buildings, and the risk associated with it.

The IICRC guidelines help restoration experts such as Critical Control to evaluate the severity and type of damage on each project.

There are many reasons that water damage professionals must follow these guidelines. There are situations that warrant our bringing in an Indoor Environmental Professional (IEP). An IEP is a person who has the skills and training to evaluate an area for contamination collect samples, perform lab tests and give us advice on the kind of water damage that is likely to occur.

This is especially important in cases where the building’s occupants are at high risk or have concerns regarding contamination.

Categories and Classes of Water Damage


Water damage restoration projects are classified into categories and class based on the extent of the flooding of water.

The class is based on how contaminated the water that enters the structure was. Category 1 water comes from a clean source like the sink or tub, or a water source that bursts.

Category 2 water has high levels of contaminants and could cause illness if it is consumed or in contact with. This could include water that isn’t obvious as a risk such as the effluent from washing machines, or the overflows from toilets.

Category 3 water is grossly contaminated meaning that it can contain pathogenic, toxic or any other harmful agent in it. This usually means contamination by toilet backflows following the toilet trap or a flood of seawater from rivers and streams or any other water arising from the building exterior. The water in this category could include heavy metals, pesticides that are regulated, toxic materials, or substances in it.


The IICRC has also established classes to follow when determining the degree of water intrusion to your property. This system is basically an indication of how saturated a building or house is.

Class 1 refers to the lowest amount of absorption and the amount of water. This is when water comes into contact with less than 5% of the building materials which absorb water. This is the situation where most of the substances affected by water have low evaporation, meaning, they do not absorb or hold in water. Concrete and masonry, as well as plaster and coated or finished wood are only some of the examples.

Class 2 means that there is significant absorption of water and intrusion. It’s about 5 to 40% of the total ceiling, floor and wall consist of low evaporation materials such as plaster wood, concrete, or bricks and mortar.

Class 3 means that about 40 percent or more of floor, wall, and ceiling materials are porous like carpet, insulation, fiberboard and so on. Other materials like cement or plaster that don’t absorb water have not been affected in any way.

Water has been absorbed into materials like concrete, plaster, and wood, which are classified as Class 4. This requires more drying time and special drying methods.

How to Dry a Water Damaged home or Building Works


Physical extraction, dehumidification, and evaporation are the three main methods of removing water from buildings. The removal of liquid water is at least 500 times more effective than just putting up with dehumidifiers and air moving machines. The quicker the structure is dried the more effective. The quantity of material that needs to be extracted will affect the extraction process as well as dehumidification methods.

Water damage professionals employ a variety of extraction techniques. Our tools include tools for subsurface extraction, wands Self-propelled tools, self-propelled instruments, and vacuum squeezers.

Forcible Evaporation

After the water is removed, any moisture remaining is then dried by high-speed airmovers.

When an object is moistened or submerged in water it absorbs a portion of the moisture or water. In the process, the material gets dampened or wet.

Saturation is defined as the point at which it becomes impractical for the air to contain any moisture. Higher humidity means that the air is closer to saturation.

In the evaporation process the water molecules leap from a liquid to a gaseous state. This is referred to as evaporation.

In other words, the object does not absorb any more water from the atmosphere. This is referred to as the saturation point. When saturation has been reached the drying process commences.

In the evaporation phase high-efficiency air moves dry the object on two sides. They generate strong airflow that is directed by a filter system.

A fan that moves air can transport between 10 and 20% more air than a fan, or an ordinary fan in your home.

Air movers dry objects about 10 times faster than in natural conditions, where there is no air movement.

High-velocity airflow removes the moisture from the surface and absorbs the water drawn out by the air movement.

Using Heat To Assist the Drying Process

Heat is an important component of any water damage restoration task. We use a variety of heaters to dry the materials that have been damaged by water.

Electric Heating Equipment: These heaters can be used for drying jobs that require multiple heat sources. It is possible to run several heaters simultaneously due to their numerous wattages.

Electric heat can also be able to be reduced or turned off during the process, without affecting your other heaters. This means you can lower one heater, while raising the wattage of another to maximize efficiency and reduce your expenses for energy.

Electric heaters are a common feature in restoration work since they generate virtually zero emissions and consume only a small amount of water. However, the only drawback is that they take longer time to get hot, which requires more time to dry process in general.

Hydronic Bioler (TES): Hydronic boilers are also very efficient at heating up quickly and generating low emissions. They typically operate on natural gas or propane.

Hydronic boilers are different from electric heat since they don’t utilize forced air heat to disperse heat. This can make it difficult to heat large areas evenly with these heaters. They also run at an lower temperature, making them perfect for drying tasks which require ceilings and walls to be left in place.

Hydronic boilers are often used in situations where there is no electricity to power electric heaters. They are capable of producing radiant heat and can keep your drying space warm without the need for an electric source.


To keep buildings and homes dry that are damaged due to flooding, we employ low Grain Refrigerant (LGR) Dehumidifiers.

The LGR Home Dehumidifier can remove 170 pints of water from a damp building which has been badly damaged by water damage each all day, every hour of the day.

Apart from removing water from the air like an LGR Refrigerant Dehumidifier does this, the home dehumidifier can also get rid of up to 99% of mold spores that are airborne in the air by eliminating condensation.

Fixing Hardwood Floor Water Damage

It is essential to take away the hardwood floors that have been damaged by water so that repairs can be completed starting from the subflooring.

Subflooring that is damaged first has to be taken off and fixed. After that, the hardwood flooring damaged need to be replaced or sanded. Once these repairs are complete then the entire floor must be sanded and then refinished to guarantee a uniform appearance.

Carpets are vulnerable to water damage

Floods can cause serious destruction to your home and cause it to be costly and difficult to repair. Even if the water is taken away from the affected region immediately, there’s an opportunity that you will have to eventually replace the flooring.

It’s a huge shock to discover that your house isn’t in the best condition after you have spent many hours and dollars to repair it.

This is why it is crucial to determine the extent of damage as soon as possible. The first step is determine if the affected area requires replacement. There is a way to clean the carpet, then use it once dry. This can alleviate any worries about mildew growth or persistent odors.

Salvaging Carpet After a Water Damage Event

There could be staining on your carpet if the water damage was very extensive. There are times when you have to replace your flooring in order to eliminate these stains. A strong, lingering odor can also be an indication to change your carpet. If you find this to be the case, then you will likely require replacement of both your carpet and padding.

Check to see if the flooring can be dried professionally before you decide to replace it. If you’ve got a reliable company do the cleaning, you’ll be able to determine how serious the damage was. Our firm will examine your carpet and determine whether it’s worth replacing or repairable. Be aware that some methods employed for drying may cause further damage to the carpet if it is already in poor condition.

Some of the considerations which will decide whether or not the carpet and padding need to be replaced are:

  • How much water did you get on your carpet?
  • How long did the water stay on the carpet?
  • What was the origin of the water?

Are your carpets dry or cleaned professionally?

If the padding beneath your carpet is damaged, it could affect the length of time your carpet will remain clean. Although your carpet has been dried quickly, mildew growth can still occur when the padding beneath isn’t dried.

A professional carpet cleaning company is the best option to ensure that your carpet is clean and dry after an event of flooding. After the company completes their job, you’ll be able to make a more informed decision about the state of your carpeting and decide whether or not to replace it.

Drywall that has been damaged by water

The drywall repair procedure varies depending on the severity of the damage. Repairing water damage can be simple as taking out a section of drywall, cleaning it, and then replacing it.

The flip side of the coin is that serious damage could require whole-wall replacement including walls studs and fiberglass insulation.

Mold spores can be found in drywall damaged by water that is difficult to eliminate. So in most cases the drywall needs to be replaced. We employ moisture testing instruments to determine the amount of moisture. This allows us to isolate the areas that are damaged and limit the costs to only necessary damaged areas.

Water can also cause structural damage as it causes the material to expand or shrink. It is easier to break wood if it has been moistened with water. The wood may get brittle if left to dry in water for too long.


This problem can be avoided by homeowners and building owners making immediate changes to repair structural damage from moisture-related problems with their property following flooding or other water damage.

Water Damage to the Foundation

There are numerous reasons why water damage can affect the foundation of a home. While not all issues with water cause structural damage, it’s crucial to address foundational issues in the quickest time possible to prevent structural damage.

The damage caused by water in the foundation could cause many different problems in the manner it is dealt with. It can cause severe structural damage if it isn’t addressed quickly.


Roof Water Damage

Water damage to roofs can be caused by natural catastrophes similar to foundation water damage. As well as causing roof leaks, roof damage can also cause issues with the walls and foundation of a home or building.

Leaking roofs can be extremely expensive and could have major negatives. A leak in the roof can cause mildew and mold to develop, which could be fatal. A leaky roof can harm the roof truss system, which can cause structural damage to the roof.

If you don’t take care to address leaks in your ceiling right away, they can cause your rafters decay and soften. Electrical faults are also common when it comes to roof water damage which could cause an electrical fire. These are all good reasons to get roof water damage repaired immediately following a flood, or other sudden damage.

HVAC Water Damage

If your HVAC system is failing or brand-new equipment is found to be faulty, this can definitely cause structural damage to your home. If you do not have HVAC you’re exposing the inside of your business or home to all sorts of issues. Mold growth can occur and cause a variety of health issues that are very serious.

Pipe water damage

If you have pipe water damage, the water is likely to be from a pipe that has burst in your home. If you’ve determined there’s been a leak, it’s important to get professional help to stop the leak and ensure that it doesn’t cause structural damage.

A pipe that bursts can cause devastating damage. When your pipes break they can let water into your home, causing extensive damage , and may require repair of water damage. This is a process that can cause structural damage.

Stop the water supply and call an experienced IICRC-certified professional with a firm for water restoration like Critical Control as soon as you spot broken pipes or water damage.

What’s the cost for cleaning up water damage?

Water damage restoration cost per square foot

Based on the square feet the repairs and cleanup expenses vary. National Flood Services has the below pricing breakdown per square foot.

  • Category 1: Clean water: $3.75/sq. Ft.
  • Category 2 gray water: $4.50/sq. feet.
  • Category 3 black water $7/sq. feet.

Can Water Damage be covered by the homeowner’s insurance policy?

Homeowners insurance policies are usually used if the damage is unexpected and not intentional. According to the Insurance Information Institute, homeowners insurance can cover repairs or replacement for a broken window, but not if the damage is a result of negligence.

Neglect can be described as damage to a surface or an object that results from the weather, lack of maintenance or general degradation. According to the US-based Insurance Information Institute, homeowners insurance doesn’t cover damage due to neglect.

A homeowners policy would not be able to cover damage to water caused by flooding. A flood policy is required. Mortgage lenders may require flood insurance in some areas. Flooding may occur due to storms, over-saturated ground, overflowing or surging bodies of water, such as rivers, ponds, lakes oceans, streams when combined with strong winds.