Name: Installation of large window in Wavre | Avenir Rénovations
Brand: Avenir Rénovations
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The types of sliding glass doors we install in Wavre

The choice of the door depends on the wall configuration, usage, and budget.

Sliding glass door

The sliding system is the most common: one or two fixed panels, one or two sliding panels. It requires little clearance inside and allows for a wide opening onto the terrace. The ground rails must be treated carefully to ensure waterproofing and avoid thermal bridges.

Pocket sliding glass door

The pocket system is the most discreet: the panel slides into a box integrated into the wall. When open, the glass completely disappears into the wall. It is the most expensive solution but also the most fluid, completely erasing the boundary between inside and outside.

Fixed glass door with side opening

A large fixed surface with a side-opening leaf is often the most insulating solution: the fixed surface has no movable peripheral seal and therefore no thermal leakage around its perimeter. The side opening ensures necessary ventilation.

The technical points of installing a large window in Wavre

The installation of a large window is a more complex operation than replacing a standard window.

The energy performance of a sliding glass door in Wavre

A sliding glass door is a large glazed surface that can become a thermal weak point if not properly selected. The choice of glazing and profile directly affects comfort and heating consumption.

Double or triple glazing?

For a sliding glass door in Wavre, double glazing with enhanced insulation (Ug of 0.6 to 0.7) is now the standard. Triple glazing offers additional insulation but increases the weight of the sliding panel, requiring a more robust rail and mechanism. For large surfaces on a north facade or exposed to prevailing winds, triple glazing may be justified.

Thermal bridge break

The thermal bridge at the bottom rail of a sliding door is the most delicate area. A rail with integrated thermal bridge break prevents condensation and heat loss at the base of the door. This option is essential in high energy performance homes and recommended in all cases for a durable result.

Passive solar gain

A large south or southwest facing bay window captures passive solar gains in winter and can reduce heating needs in the adjacent room. In summer, a retractable awning or a facade pergola protects against overheating without blocking the view. The combination of a south-facing bay window and external solar protection is the most effective passive solution for a living room in Wavre.

What is the price of a large window in Wavre?

The budget depends on the type, size, and any masonry work required. Indicative ranges in Belgium, VAT included.

Type of work	Price indication including VAT
Sliding aluminum large window 2 leaves (200x220)	2,500 to 4,500 €
Pocket large window (200x220)	4,000 to 8,000 €
Home extension of load-bearing opening (additional cost)	1,500 to 5,000 €

A precise quote is established after a visit and measurement of the existing opening. For a sliding window of 2.5 m on existing masonry without structural modification, expect 3,500 to 5,500 €, including finishes.

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Glass wall and building permit in Wavre

Widening an existing opening to install a glass wall may require a declaration or a building permit in Wavre, depending on the facade concerned and the extent of the modification. Generally, modifications to a facade not visible from the public road often fall under a simplified urban declaration. Modifications to the front facade sometimes require a permit. Avenir Rénovations checks this point during the free technical visit and assists you with the procedures if necessary.

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The glass wall and property value in Wavre

Opening a living room to the garden with a large glass wall is one of the most value-enhancing modifications to a property. It increases perceived space, improves brightness, and creates a continuity that is universally appealing. In Wavre, houses from the seventies that have undergone this type of transformation clearly stand out from similar unrenovated properties during real estate appraisals. Combining the installation of the glass wall with the replacement of frames and improvement of insulation allows for the entire project to be completed in one mobilization and optimizes implementation costs.

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Open your living room to the garden in Wavre

A glass wall between the living room and the garden is the most visible transformation with the least structural work, when the wall is not load-bearing. When it is, we manage the lintel and shoring. Request the quote: Avenir Rénovations manages the entire project in Wavre, from drilling to finishing. The free technical visit includes checking the wall structure, measuring the existing opening, and a complete analysis of the necessary finishes. You receive a detailed quote with the cost of each item: demolition, installation of the lintel if necessary, supply and installation of the glass wall, including interior and exterior finishes.

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