A hot house in the summer can completely ruin your day and lead to sleepless nights and an uncomfortable living environment. The cause usually lies in a combination of factors: poor insulation, insufficient ventilation, too much sunlight entering the house, and heat buildup from appliances. Fortunately, various effective solutions are available, from simple ventilation measures to professional air conditioning systems.

Why does poor ventilation cause stifling heat in your home?

Insufficient ventilation creates a greenhouse effect in which warm air remains trapped and has nowhere to go. This problem is often underestimated, but it can cause the temperature inside your home to rise 5 to 8 degrees higher than outside. The warm air accumulates, especially on the upper floor, making bedrooms uninhabitable.

The solution lies in creating airflow by strategically opening windows during cooler moments of the day and installing mechanical ventilation where necessary. Leaving skylights slightly ajar allows for the natural removal of warm air, while fans improve circulation.

How does sunlight through poorly shielded windows cause your energy bill to explode?

Direct sunlight entering through unprotected windows can raise the temperature in a room by 10 to 15 degrees within a few hours. This forces air conditioners and fans to work much harder, resulting in energy bills that are sometimes 40% higher during hot summer months.

Effective sun protection such as exterior awnings, reflective window film, or thermal curtains can drastically reduce this problem. By blocking sunlight before it enters your home, you prevent heat buildup and keep costs manageable.

Why does my house get so hot in the summer?

Your house gets warm from a combination of external and internal heat sources. The sun heats your roof, walls, and windows, causing heat to radiate inside. At the same time, appliances such as computers, lights, and cooking stoves produce additional heat. Poor insulation makes it difficult for this heat to escape.

Other important factors include:

Dark roofing that absorbs a lot of sunlight
Large window surfaces facing south and west
Insufficient roof insulation
Warmth from neighbors in terraced houses
Stagnant air due to lack of flow

Which ventilation methods help combat a hot house?

Natural ventilation works best by strategically opening windows. Open windows on opposite sides of your house at night and early in the morning to create cross-ventilation. Close all windows and curtains during the day to keep cool air inside.

Mechanical ventilation offers more control:

Ceiling fans improve airflow and make temperatures feel 3-4 degrees cooler.
Extractor fans in the kitchen and bathroom remove humid, warm air directly.
Whole-house fans draw in cool outside air and blow warm air away.
Roof ventilation prevents heat buildup in the attic.

Timing is crucial: only ventilate when the outside temperature is lower than the inside, usually between 22:00 PM and 08:00 AM.

How can insulation help combat heat in the house?

Good insulation works in two directions: it keeps heat out in the summer and in during the winter. Roof insulation is the most important, because warm air rises and a poorly insulated roof can cause temperature differences of up to 10 degrees.

Prioritize these insulation measures:

Roof insulation with a minimum Rc value of 6,0
Cavity wall insulation to prevent heat radiation
Floor insulation to retain coolness
Reflective insulation under roof tiles

Please note: insulation alone is not enough. Always combine it with good ventilation to prevent moisture and heat buildup.

What are effective ways to block sunlight?

Exterior sun shading is the most effective method because it blocks sunlight before it reaches your windows. Screens, shutters, or awnings can block up to 80% of the heat. Awnings above south- and west-facing windows make a huge difference.

Alternatives to interior sun protection:

Thermal curtains with reflective backing
Window film that reflects heat but lets light through
Honeycomb pleated blinds
Blinds that you can adjust according to the position of the sun

Avoid dark curtains that absorb sunlight and then release heat into the room. Light colors reflect heat better.

When is air conditioning the best solution?

Air conditioning becomes necessary when natural methods are insufficient, especially in well-insulated modern homes where heat has difficulty escaping. At indoor temperatures above 28 degrees, or when your health is at risk due to the heat, mechanical cooling is the only effective solution.

Modern monoblock air conditioners offer advantages over traditional split systems because they do not require an outdoor unit. This makes them ideal for listed buildings, homeowners' association properties, or situations where outdoor units are undesirable.

Consider air conditioning system when:

Other methods provide insufficient cooling
You have health complaints due to the heat
Sleep problems due to warm nights
becomes working from home impossible due to heat

How De Betonboorder helps with air conditioning installation

We specialize in the professional installation of monoblock air conditioners by drilling precision holes in concrete and stone walls. Our experienced craftsmen ensure an expert installation requiring only two holes with a diameter of 16 cm, finished with steel grilles.

Our services include:

Drilling into all wall types with high-quality diamond drill bits
Dust extraction for stone walls and water-cooled drilling for concrete
Protection of walls and floors during work
Optional condensate drain for optimal performance
Installation on every floor with a neat finish

We will contact you within 24 hours. contact We look forward to a suitable solution for your warm home. Our installations take place within 10 working days after confirmation, and we always leave the work area tidy.

What to do about a hot house?