Leaky homes, cracked walls, mold and termite invasions! Here are ways to cope with the rainy season that homeowners should know.

As the rainy season begins, issues related to the house often become apparent, such asleaking roofs, cracked walls, mold, and algaecaused by accumulated moisture, as well as termite problems that tend to thrive in high humidity environments. If left unaddressed, these issues can escalate, causing damage to the structure and increasing repair costs in the long run. The weather during the rainy season in Thailand, which includes heavy rains and continuous humidity, is a significant factor that accelerates the deterioration of materials. Therefore, being prepared and choosing the right prevention methods early on is essential for homeowners. This article compiles comprehensive management strategiesfor rainy season home problemscovering everything from analyzing the causes of the problems to systematic prevention and solutions, based on real working principles in the field, to help ensure that homes are strong, reduce the risk of damage, and be ready to face the rainy season confidently in the long term.

Select the rainy season problem you want

Leaking Rooftop Problems

Causes

Leaking rooftop and terrace problems can arise from various factors, including structural issues, installation errors, and material deterioration. Common causes include non-standard installations, such as incomplete sealing of joints or screw holes, clogged drainage systems causing water accumulation, and the deterioration of waterproofing materials over prolonged use. Additionally, surface damage, such as cracks, splits, or peeling of the original coating, are all significant factors that allow water to penetrate the building structure.

Check for Initial Signs of Leakage

• There are water stains or damp spots on the ceiling.
• Water seeps through the walls after rain
• Mold, algae, or musty odors are found
• Water accumulates on the rooftop, drainage is insufficient
• Cracks or peeling surfaces are observed

If these symptoms are found, it is important to check and fix them promptly to prevent further damage

Solutions for leaking rooftops

The solution should begin with a proper analysis of the cause and proceed with the following steps

1. Check for leaks Inspect areas of cracks, joints, building corners, and drainage points
2. Clean the surface Remove dust, dirt, mold, and algae to enhance adhesion
3. Repair cracks Seal cracks or joints with appropriate sealant to prevent water seepage
4. Improve drainage system (if necessary) Address water accumulation issues to prevent water pressure build-up on the surface
5. Apply primer and waterproof paint Apply primer first to enhance adhesion, then apply waterproof paint in at least 2–3 layers and reinforce with fiber mesh in vulnerable areas

Temporary fix vs Long-term solution

• Temporary fix: Seal leaks or apply spot coatings, suitable for small issues
• Long-term solution: Reinstall the waterproofing system across the entire area to effectively prevent recurring leaks

Choosing appropriate waterproofing materials

Selecting quality waterproofing materials suitable for the weather conditions is a key factor in achieving sustainable solutions, such asBeger ROOFSEAL Cool PU HybridIt is a waterproofing innovation for decks and roofs developed specifically to withstand the weather conditions of Thailand, featuring the flexibility of the hybrid polyurethane system that accommodates the expansion and contraction of surfaces, reducing the likelihood of cracks and effectively preventing leaks. Alongside this,the Ceramic Coolinginnovation helps reflect heat, reduce surface temperatures, and decrease heat accumulation within buildings over the long term.

Additionally, it has been enhanced withGraphenetechnology, which has outstanding properties of high strength, reinforcing the durability of the coating film. The small particles can penetrate the surface, helping to fill cracks at the micron level and increasing adhesion efficiency. Furthermore, it has excellent heat resistance, enhancing the durability of the waterproofing system in extreme weather conditions.

Moisture Problems

Causes

Moisture is a significant factor that causes various problems in homes, such as peeling paint, blistering paint, as well as the growth of mold and algae on wall surfaces, all of which affect both the aesthetics and long-term durability of the structure. Moisture can be divided into two main types: temporary moisture and accumulated moisture.

• Temporary moisture is moisture that occurs due to external factors, such as after rainfall or following new plastering, which generally can evaporate and decrease over time if there is proper ventilation.
• Accumulated Moisture is moisture that arises from structural issues or usage within a building, such as leaking pipes, groundwater seeping up around the foundation, watering plants near walls, or being located close to water sources. When moisture accumulates in walls continuously without being able to ventilate, it can cause surface deterioration, peeling, and create an environment conducive to the growth of mold and mildew.

Moisture Problem Solutions

Temporary Moisture

Temporary moisture, or moisture from external factors such as rain or new plastering, generally decreases over time. However, an important point to be cautious about is the “timing for painting,” as painting on surfaces that still have high moisture can lead to issues such as paint peeling, slow drying, and reduced lifespan of the paint film in the long term. According to construction standards, if it is a newly plastered wall, one should wait at least 28 days before painting, and in cases where the wall is wet from rain, one should wait for the surface to dry for at least 24 hours to ensure that the moisture level drops to no more than 14%, which is suitable for paint adhesion.

However, modern paint technology allows for a reduction in waiting time by selecting high-moisture-resistant primer paints such asBeger Rain Quick B-2900(water-based),Beger Pro Quick B-1900orBeger Super Quick B-2100which can be used as soon as 2 days after plastering, as they can tolerate moisture levels of approximately 25%–70%. For cases that require expedited work or areas with particularly high moisture, one can chooseBeger Water Block Primer B-3100which is a high-performance moisture-resistant primer that can be applied immediately after rain and can withstand moisture levels up to 75%, helping to reduce work limitations and increase confidence in long-term surface quality.

Accumulated humidity

In cases of accumulated humidity, which often results from structural or internal system issues in buildings, such as leaking water pipes or water seepage from bathroom floors, the correct approach to solving the problem should always start with addressing the “root cause of humidity.” This may involve sealing leaks, repairing piping systems, or improving joints and re-grouting tiles for effectiveness. Only then should surface repairs and wall painting be carried out according to the extent of the damage. For cases of humidity caused by groundwater seeping up at the lower edges of buildings, which is a type of moisture that moves through the structure, there is currently no permanent solution that can completely stop the problem. However, the impact can be reduced and the lifespan of the surface can be extended by using appropriate moisture protection systems.

The recommended approach is to use moisture-proofing agents such asBeger Aqua Block W-009orBeger Water Block W-010Apply at least 2 coats on the surface to help reduce moisture penetration, then apply a high moisture-resistant primer paint with 1 additional coat to enhance the adhesion of the next layer of paint and help the paint film become more durable in the long term.

After addressing and preventing moisture issues on the surface layer, the next important step is to choose a quality topcoat to enhance durability and extend the overall lifespan of the paint system. For exterior work, it is advisable to select paint that can withstand variable weather conditions, both intense sunlight and rain, such asBegerCool DiamondShield 15which effectively protects surfaces from heat, moisture, and pollution

For interior work, it is recommended to choose paint that offers both aesthetic appeal and hygienic properties, such asBegerShield AirFresh Anti-Virus Gold Ionwhich is designed to meet the needs of living spaces by helping to reduce unpleasant odors and enhance a healthy environment for residents

In cases where quick work is required and surface preparation steps need to be minimized, you can opt for 2in1 paint likeBegerCool 2in1 which combines the properties of primer and topcoat in one product, making painting convenient and time-saving while still providing suitable performance for both exterior and interior work

Cracks on the wall problem

Cause

Cracks in the house can occur for several reasons, such as surface preparation, poor plastering, non-standard cement mixing, settling of the house’s structural columns or the ground, and the expansion – contraction of concrete when exposed to heat – cold or moisture, etc. Essentially, we can categorize cracks into 2 types: Cracks that do not affect the structure For example, cracks and fissures not exceeding 10 mm, and Cracks that affect the structure For example, deep cracks larger than 10 mm in the area of columns, beams, or vertical cracks in the middle of the house.

How to fix cracks and fissures.

The solution for cracks in the house can be addressed according to the type and nature of the cracks, both by using filler products and by adjusting the structural system of the house.

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