A successful veranda: the 11 questions to ask
Long live veranda ! An extra room, bathed in light and open to the garden ... The veranda is an accessible dream, but to be sure to enjoy it to the maximum, it is necessary to cogitate upstream. What is the price of a veranda? Who to turn to have the veranda built ? What are the steps to perform? Should we have a building permit ? What materials do you prefer for a stylish veranda? What use to make? For which glazing opt ? How to protect your porch from the heat? Côté Maison takes stock of the questions to ask when the installation of a veranda is a project of expansion and extension of your home.
The construction of a veranda can not be improvised. To avoid disappointment, it is even essential to think carefully about his expansion project, take the time to do all the steps and finally to speak to a competent professional. Discover all our info for a perfect conservatory construction.
Also read> Buying Guide: How to choose your porch?
1. Where to turn to build my porch?
In wood and steel, the verandas are the reserved area of the craftsmen. They are more expensive than aluminum models but have the advantage of being truly personalized. In aluminum, they are the business of the "verandalists", very numerous today. But, beware, some brands sometimes tend to practice aggressive sales methods. It is better to be wary. In general, it is imperative, before choosing the company, to ask to see examples of achievements, not just in photo. A serious and reliable company will encourage this approach and give you the coordinates of former customers. The Qualibat certification Veranda is also a guarantee of know-how and the assurance that the company is covered by a ten-year guarantee.
Read also> Top 15 brands of verandas
2. What are the steps to take?
Before any construction project, inquire about the feasibility of the work by consulting, in town hall, the COS (coefficient of land occupation) which sets the possibilities of extension of your home. Any creation of veranda, whatever its surface, requires an administrative authorization: if its surface is less than 20 m2, a declaration of works is enough. If it is superior, an application for a building permit is required. This file is to be submitted to the town hall and must include many technical elements (plans mass, etc.) sometimes difficult to achieve for non-professionals. In this case, the use of an architect can be useful, even if it is not mandatory for surfaces under 170 m2.
Your veranda must comply with the thermal regulations in force> RT 2012: what you need to know
3. What is the price of a veranda?
The price of a veranda depends on the material but also on its surface, the nature of the ground, the windows chosen, the comfort options (blinds, shutters ...). Count from 1,000 to 1,500 euros per m2 for a aluminum veranda, from 1,500 to 2,000 euros per m2 for a wooden model and from 2,000 to 2,500 euros per m2 for a wrought iron model.
4. Are there taxes for the construction of a veranda?
Because it increases the living space, a veranda has repercussions on the calculation of the housing tax and property tax. Like any construction, it is also subject to the taxation of urban planning: local equipment tax (TLE), departmental tax of sensitive natural areas (TDENS), tax for the financing of the Councils of architecture, urban planning and development. environment (TDCAUE). The amount of these three taxes is determined locally. Inquire at the town hall.
Perfect for low-rise houses, this veranda is distinguished by its flat roof of last generation. Three times more insulating than the others, it integrates a skylight with reinforced solar control and can even be vegetated. Extensia Veranda with flat roof. Possibility of adding a bioclimatic pergola and an advanced Brisoletto brise brise soleil to reinforce the sun protection. Roof thermal coefficient R = 9, with mineral wool insulation, decorated with a flat acroterium finish. Can be equipped with a Hydropack revegetation complex. Wood Concept wall, frame composed in particular of wood and rockwool (thermal coefficient R = 3). Arty style interior with exposed wooden ceiling or cocooning style with plasterboard ceiling. Integrated roller shutters. 44 000 euros. Alu concept.
5. A classic or modern conservatory?
Whatever the style and material chosen, a successful conservatory blends into the landscape and blends with the existing architecture. The style of a veranda depends on the structural material, the size of the glazed surfaces and, above all, their size. division. The large windows are well suited to extensions with contemporary architecture. Verandas with semicircular openings and decorated decorations evoke more the winter gardens of the nineteenth century. Finally, the structures with very regular lines, drawing a grid, rather imitate the North American style. The style of the veranda can be in agreement with the house or on the contrary play the break. Only condition: in the end the proportions remain harmonious.
See also> Veranda: 8 photos to find your style
6. What material for my porch?
Steel. It is the material of the first verandas, arabesques and volutes. Abandoned in the twentieth century because of its tendency to rust, it comes back in strength thanks to treatments that make it less sensitive to weather (sandblasting, metallization) and thanks to the new paints (polyurethane or epoxy) that offer him, at choice, an appearance glossy or satin. Equipped with superior mechanical strength to aluminum and a good thermal resistance, steel allows structures of incredible finesse. Easy to put in shape, it authorizes all the decorative fantasies to create, according to the tastes, verandas of classic or modern style (Arehal, Turpin-Longueville).
Aluminum. Market leader, it is light, strong and able to support very large glazing. Inalterable, it does not fear the weather, requires no maintenance and can be lacquered or anodized in many colors and finishes. Its main disadvantage is its great driving power, but the manufacturers (Sepalumic, Reynaers, Schüco, Technal, etc.) offer joinery to thermal break (by polyamide bars). The cold and the heat do not pass, and as there are two profiles, the bicolor can be considered. Note, aluminum is a carrier of an image of modernity, its association with an old building is more difficult.
Wood. It occupies a small share of the market, and yet its qualities are numerous. Good insulation, it adapts to all architectural styles (Life & Veranda, etc.). Only a few species, however, offer the durability and stability necessary for the construction of a veranda: the red cedar, light and inert, has a coefficient of expansion almost zero. The teak has the same qualities, but it is heavier and more expensive. More economical, autoclave treated wood is also suitable. Contrary to popular belief, a wooden structure does not necessarily require strong sections, poles and beams being laminated or laminated. On the maintenance side, wood can be stained or painted (treatment to be renewed every 2 or 3 years).
7. Enlargement or approval?
Open to the garden, the veranda ensures a bright transition between home and nature. Its location and orientation will depend on its use.
What use? Once built, the veranda quickly becomes the place where everyone finds themselves: a new living room, bright and open to the garden. But nothing imposes to transform it into a salon. According to its location in relation to the house, it can equally well accommodate an entrance hall, a kitchen or even a bathroom.
The veranda-sas entrance. A buffer space that limits the entry of cold or warm air from outside. Insulation and heating issues are secondary.
The veranda-kitchen. The layout must adapt to many windows and focus on low furniture.
The veranda-bathroom. An interesting option as long as the garden is out of sight. Insulation and heating must be efficient, as well as ventilation (to avoid condensation).
To read also> And if I installed my dining room in the veranda?
8. How to steer my porch?
The orientation is decisive for a living room. Unfortunately, it is not often possible to choose one.
In the southern regionswe will prefer a south-east exposure to preserve the inhabitants of the hot summer.
North of the Loire, we will opt for a south-west orientation.
In the East, the veranda enjoys a morning sunshine which guarantees a rapid temperature rise in summer and slow winter. An efficient heating is therefore essential.
In the West, the veranda is facing the afternoon sun. In summer, strong sunlight may cause overheating at the end of the day if no protection is provided.
In the north, the veranda acts as a buffer and can reduce heating requirements of the house but, in winter, it will be uninhabitable without heating.
9. Which openings ?
A veranda is made for open wide on the garden in the summer season. With folding doors, it becomes a place of transition between the interior and exterior, or terrace. The 2, 3 or 4 leaf sliding windows (Kawneer, Sapa Building System, etc.) do not encroach on the living space. They are mounted on stainless rails that can be integrated into the ground. With some pocket doors, the panels disappear in a double partition, thus preserving all interior design possibilities.
See also> Winter garden: 12 verandas to take as a model
10. A veranda for the summer or the whole year?
To enjoy the veranda all year round, in good conditions of comfort, it is imperative to provide insulation and efficient glazing and independent heating.
The roof. It is essential for style, but also for comfort.
Glass. Transparent and unalterable, it must be laminated For safety reasons.
Synthetic glass (like Plexiglas) has the appearance and transparency of glass. Light and flexible, it requires a smaller structure and is particularly suitable for curved roofs.
Sandwich panels consist of two sheets of aluminum enclosing a layer of insulation. Recommended for verandas facing souththey offer good thermal insulation. Outside, they mimic tiled or slate roofs.
The classic roof. In tile or slate, it blends perfectly with the existing roof while guaranteeing excellent insulation. Only downside, it tends to turn the veranda into a simple extension.
The glazing. It is to choose according to the orientation, the climate and the budget.
To read also> Choose the glazing of his veranda
For thermal comfort, the classic double glazing is replaced by the double glazing with reinforced thermal insulation (ITR), which incorporates an argon blade and, in the outer face, a metal veil that, in winter, retains heat inside while allowing the sun's rays to penetrate. Recommended for south-facing verandas, solar control glazing (Solabaie, St-Gobain Glass, etc.) rejects heat before it enters the veranda, thanks to its anti-reflective film.
For the safety, a laminated glass because, in case of accidental breakage or attempted break-in, the pieces remain in place.
For simplified maintenance, glazing Self-cleaning are covered, on the outside, with a coating that causes, under the effect of the sun's rays, the decomposition of dusty deposits. These are then evacuated with rainwater.
The insulation. The insulation of the slab avoids the heat loss in the ground and allows to take full advantage of its inertia, the heat that accumulates during the day being restored in the evening.
The heating. Convectors or radiant panels fixed on the basement walls limit the cold wall effect. More efficient, the floor heating must be provided when the screed is made. Electric or circulating water, it diffuses the heat by radiation and distributes it homogeneously. With water circulation, it offers the advantage of being reversible in the summer. Disadvantage, its high inertia prevents it from reacting quickly in case of sudden change of temperature.
Ventilation. It is essential for evacuate excess heat during the summer and to avoid condensation in winter. The simplest solution: a cold air inlet at the bottom and a hot air outlet in height. If the sunroom is exposed to intense sunlight, this ventilation will be coupled with an electric air extractor that will renew a larger volume of air. In the middle of summer, aeration completes the ventilation, via snuffboxes (on the roof) or opening windows positioned to create drafts.
To read also> Choose the glazing of his veranda
11. How to hide to avoid overheating?
Shutters, blinds and other solar protection are essential to protect the veranda from heat and weather.
The external protections. Very effective, they allow to intercept solar radiation before it reaches the glass and does not cause the greenhouse effect.
Shutters. True heat shields, they combine energy savings, comfort and safety. They stop the sun's rays but also the cold. They protect the glass walls from bad weather and intrusions, and stifle the sound of rain. To be envisaged during the design (Bubendorff, Renoval, Reynaers), they integrate in the gutter for more discretion and can be motorized, even automated via the installation of a front cell (Somfy).
The brise-soleil. They are fixed on rails, themselves attached to the structure of the veranda. Their aluminum blades are oriented to dose the desired amount of light and the desired indoor temperature (Soliso). Their operation can be manual or automated, coupled with a thermal sensor.
The external blinds. They must be installed at a certain distance from the roof to leave a buffer between the blind and the glazing. Automated or not, the traditional awning acts as a visor and protects against glare. If it is well adapted to large verandahs, it has the disadvantage of fearing the wind and getting dirty quickly. A blind sliding on profiled cables or rails along the facade or the roof is then more effective. The models in acrylic fiber tinted in the mass are very blackout and resist well in time. Micro-perforated PVC-coated polyester screens provide excellent sun protection while guaranteeing air circulation under the awning (Storistes de France, Rayflectis, Reflex'Sol, etc.).
The internal protections. Deemed less effective for the thermal protectionhowever, interior blinds, awnings and other stretch fabrics are an alternative when external protection is not possible. For maximum efficiency, a model with a silvery reflective face or white capable of rejecting a portion of solar radiation, a textile incorporating an insulating layer of wadding or wool of sheep to prevent losses in winter or a micro-perforated fabric to promote air circulation between the blind and the glazing.