What is the cost of foundation painting? We will introduce the importance of foundation painting!
Hello! This is Kakeru Koumuten Co., Ltd.!
This time, I would like to explain the importance of 【foundation painting】!
“Is it okay to paint the foundation with exterior wall paint?”
“Is there really a need to paint it in the first place?”
I hope to clarify these questions a bit
by explaining the importance of foundation painting and the types of foundation paints used!
What is a foundation?
First, let me explain what part of the building the foundation painting refers to.
Simply put, the foundation is the part that serves as the base of the building.
The foundation plays a crucial role in supporting the building, so it is made by combining concrete and rebar that can withstand heavy loads.
The foundation is created by pouring a type of concrete called “discard concrete” onto the ground and assembling the rebar. Then, more concrete is poured on top to complete the foundation.
This process ensures that the rebar acts as a core, making it strong enough to withstand heavy loads.
The Importance of Foundation Painting You Should Know
As mentioned above, the foundation plays an important role in supporting the building.
The foundation also connects the ground and the building. It evenly transmits vibrations from earthquakes and strong winds to the ground, constantly protecting the building.
Additionally, it protects the building from moisture in the ground.
What happens if there is no foundation?
Without a foundation, vibrations from earthquakes cannot be transmitted to the ground, and the vibrations affecting the exterior walls cannot be controlled effectively, leading to direct damage to the walls and an accelerated deterioration compared to normal conditions.
Homeowners with a foundation should understand its importance and make an effort for regular maintenance.
Benefits of Foundation Painting
The foundation plays a crucial role in supporting the building.
So, what benefits does foundation painting bring? Let me introduce them.
・Improvement of aesthetics
・Enhanced waterproofing
・Suppression of concrete neutralization
・Prevention of mold and moss growth
・Reduction of water absorption by the foundation
Improvement of Aesthetics
Some people choose to only paint the exterior walls and skip painting the foundation, but high-pressure washing alone will not make the foundation clean. Painting the foundation will also enhance its aesthetics.
Enhanced Waterproofing
The materials commonly used for foundations in Japan are concrete, mortar, and cement.
Concrete, mortar, and cement lack waterproofing and have water absorption properties. Materials like concrete absorb water daily, expand, and then dry out repeatedly. This cycle can lead to deterioration such as cracks. By applying paint, it is possible to enhance waterproofing and reduce water absorption.
Suppression of Concrete Neutralization
Concrete neutralization is caused by carbon dioxide present in the atmosphere, which dissolves in the excess water of the concrete and eventually transforms into carbonic acid.
As neutralization progresses, it can ultimately lead to dangerous symptoms such as spalling in the rebar of the foundation.
Since it is caused by carbon dioxide, covering the surface with a waterproof coating can prevent neutralization!
If No Painting is Done
Since concrete, mortar, and cement lack waterproofing, they absorb moisture and dry out, which can lead to cracks in the foundation.
If cracks occur, rainwater can enter through the gaps in the cracks, reaching the rebar and causing rust. Once rainwater reaches the rebar, durability will decrease, so it is best to cover it with paint before that happens.
Symptoms of Foundation Deterioration
Now, what are the symptoms of foundation deterioration? I briefly explained above, but I will provide a more detailed explanation.
Hairline Cracks
Hairline cracks refer to very small cracks, about the size of a hair.
Generally, those measuring less than 0.3mm are considered to pose low risk and do not require repair. However, it is important to note that some may progress and become larger over time.
In the case of hairline cracks, painting can be expected to stop the progression of the cracks!
Structural Cracks
Structural cracks refer to larger cracks that can significantly impact the structure.
Generally, those exceeding 0.3mm are considered to pose a higher risk and require appropriate repairs.
If structural cracks have occurred, epoxy resin or sealing materials will be used to fill the cracks.
When painting, repairs to the cracks should be done first before applying the paint.
Recommended Foundation Paints for Foundation Painting
For foundation painting, it is best to use foundation-specific paints designed for this purpose!
Among foundation paints, I will introduce the foundation paints recommended by Kakeru Koumuten Co., Ltd.!
Foundation Paint ①: Primer Material Water-Based Miracle Sealer Eco by SK Kaken
① It adheres strongly to various old coatings and water-based finishing materials (hard and elastic), making it widely applicable for both new constructions and renovations.
② It keeps TVOC (total volatile organic compounds) below 1%, and is designed with safety considerations, containing almost no environmental pollutants, achieving a formaldehyde emission grade of F☆☆☆☆.
③ The one-component bridging system demonstrates excellent water resistance and alkali resistance.
④ It has excellent permeability to the substrate, providing a high sealing effect.
⑤ Due to its special design, it exhibits anti-fungal and anti-algal functions from the primer, maintaining a hygienic environment.
⑥ Being water-based, it poses no risk of fire or organic solvent poisoning, allowing for safe use indoors and outdoors.
The Water-Based Miracle Sealer Eco is a one-component water-based multifunctional primer that can be used as a primer for various water-based finishing materials, regardless of elastic or hard types.
It is often applied together with the Base Protect introduced below.
Foundation Paint ②: Finishing Material Base Protect by SK Kaken
① Suppression of Neutralization
Prevents the intrusion of moisture and carbon dioxide, suppressing the neutralization of concrete.
② Excellent Moisture Permeability
High moisture permeability helps to prevent blistering and other issues.
③ Excellent Substrate Followability
Demonstrates excellent substrate followability due to its micro-elasticity.
④ High Durability
The synergistic effect of highly weather-resistant modified acrylic silicone resin and light stabilizers provides long-term high durability.
⑤ Anti-Fungal and Anti-Algal Properties
Its special design shows strong resistance to microorganisms such as mold and algae, maintaining a hygienic environment over the long term.
The foundation is significantly affected by moisture and rainwater, making it more susceptible to deterioration compared to other areas.
SK Kaken’s Base Protect provides breathability to the coating, achieving a coating structure that is less affected by moisture. Additionally, it incorporates neutralization prevention functions necessary for the foundation that supports the structure, playing a significant role in protecting the building.
Colors
Average Cost of Base Painting
| Cost Estimate | 2,000 yen to 3,500 yen per 1㎡ |
| Construction Details |
○ High-pressure washing and surface preparation ○ Protection ○ Painting (undercoat and topcoat) ○ Cleaning |
Note⚠︎ The table above is an estimate and should be used as a reference!
Summary
We introduced the basics of painting and the types of paint used, how did you find it?
It’s a part that often goes unnoticed, but it diligently supports your home every day. That’s why we hope you can pay a little attention during the construction!
If the contractor doesn’t mention anything about the foundation during the exterior wall painting, please check it yourself!
Estimates and inspections are, of course, free! If you have any concerns regarding roofs, rain gutters, exterior walls, or exteriors, please consult Kakeru Koumuten Co., Ltd.!
We carry out everything from temporary scaffolding construction to roof work and exterior painting entirely in-house. We are confident that our costs, quality, and planning are unmatched in exterior construction compared to other companies! We welcome competitive estimates!
You’ll be glad you chose us! We take every request seriously to ensure you feel that way.
We look forward to your inquiries. Thank you very much.
Helpful information about exterior renovations can be found here!
・Summary of popular colors for exterior wall painting! We will introduce recommended color combinations!
・For those who want to try DIY exterior wall and roof painting! Scaffolding setup only! DIY plan for roof and exterior wall painting!
・Latest! Subsidies in Kanagawa Prefecture! We will introduce grants and reduction systems!
・Is exterior wall painting unnecessary? We will introduce the risks of neglecting it!
・How much does exterior wall painting cost? Are there tips to reduce costs?
・What is the best time for exterior wall painting? How to determine the best timing!
・How much does exterior wall painting cost? Are there tips to reduce costs?
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contact Kakeru Koumuten Co., Ltd.
Kakeru Koumuten is a young company whose team is, on average, in their late twenties, but our skills are second to none.
Our greatest strength is that we handle scaffolding, roofing and painting entirely in-house. In an industry where these tasks are usually divided among contractors, our complete service simplifies project management and helps keep costs down. Above all, if a problem arises, we respond promptly.
We proudly describe ourselves as the youngest and most helpful renovation company in Kanagawa!
