Declinable in multiple combinations, the pergolas define a relaxation area in the garden. Gratings, trellises, railings, planters... the catalogs are full of solutions to personalize the structure. Evolutionary and easy to build constructions, in which the kit reigns supreme.
The pergola is an excellent support for climbing plants: honeysuckle, clematis, wisteria or roses... which in return facilitate its integration in the garden. Do not hesitate to vary the species to multiply the effects and alternate flowering periods.
Assembling a kit pergola is almost sinecure. If the possibilities vary a little according to the productions, the basic principle remains much the same. By drawing from a wide range of poles, straight or arched cross members, jumpers, trellis panels or screens, you can reproduce typical models or compose your own arrangements. Hence the interest of flipping through the manufacturers' catalogs (Burger, Collstrop, Cerland, Hillhout, Tiempo...) or their websites. All the parts, in wood treated by autoclave (guaranteed ten years), assemble themselves by simple screwing.
The good plan
It is above all essential to define the main lines of your future realization. A detailed plan makes it possible to precisely quantify the overall cost of your work and also to establish the list of parts to be ordered. Major retailers (Garden Centers, GSB) do not always have large stocks.
A comfortable pergola should provide some shade during the hottest hours, and protect you from any prying eyes of the neighborhood while opening to the garden. To implement it, take into account the orientation with respect to the sun, but also the view to privilege. It can stay wisely back to the house, or settle at the bottom of the garden, just to offer a relaxation area a little behind.
Treat the seat
Several types of bases can support the structures of pergolas. Brackets to be screwed, anchors to be sealed or specific hoofs to drive in the ground multiply thus the possibilities of implantation. The first are fixed on a masonry floor or a wooden terrace. The latter require pouring concrete pads. And the last ones are perfect for implantation on a flat lawn. In all cases, the regularity of the construction depends on a good leveling of these bases.
Our pergola to climb takes place on a terrace slatted. In such a case, these gratings must be screwed on joists. Treated in the factory, these long and thick sleepers can rest directly on a masonry floor. When planting in the lawn, you must first scratch the surface to remove any vegetation. Concrete blocks crisscrossing the area then receive a geotextile cover - which prevents regrowth - and then the joists themselves.
Prepare to simplify
For some wood frame houses, the craftsmen assemble the walls on the ground and then raise them. This principle, transposable to our pergola, saves time and benefits from the flatness of the ground to guide the assemblies. It is also applicable to the introduction of the struts - called trestles by the manufacturer - responsible for rigidifying the structure: the floor is more comfortable and facilitates assembly work.
The sides of the structure, once raised, are interconnected by "riders", kind of long cross perpendicular. The laying of the central rider is sufficient to ensure a temporary vertical support (photo 6). A helping hand from the friends present is welcome at this stage; if you are only two, provisionally subvert the posts halfway up, with cleats flanged by clamps.
Screwing the supports to the ground at this stage is tempting, but better wait until you have secured the sides of the structure by three riders to permanently anchor the posts. This first part of the structure can thus, once completed, be slightly moved to better center on the terrace or correct a bad balance. It remains to install the two end riders and their easels. Then check each post at the bubble level before screwing the deck onto the floor.
The top of a pergola usually receives a series of riders, 30 to 40 cm apart depending on the desired effect. On our realization, the case is a little different because a part of the "roof" receives jealousy panels (90 x 180 cm) whose blades are oriented to filter the rays of the sun. This zone of the cover is content with three intermediate riders, which serve as supports for the blinds.
Make yourself happy
By combining the various elements, you can easily customize your achievement. The sides can thus receive trellis panels, low fences, trellises of all kinds or benches. These accessories are 180 cm long, the usual distance between two poles; even the plant tubs coincide with these measures.
Engage the base of the posts in the galvanized steel plates and fasten them by screwing. Use screws of adequate length to the section of the wood, knowing that it is necessary to screw on both sides.
The connecting struts of the struts (or trestles) that strengthen the assemblies are set up in advance. The axis of these screws must be perpendicular to the miter cuts of each end.
Place the center post on level ground, engage the end of the top rail in the notch, center the cross member and screw the link. For posts of 9 x 9 cm section, 70 mm screws are sufficient.
Place an easel in the corner, check the squareness then screw. Then present the opposite cross in abutment against the first, screw in turn at the top of the post, add a second bridge.
Then fix the two end posts and their easels. The set still retains a relative flexibility.
You can even lift it slightly if you run out of space for the screwdriver.
Then nest the end riders, whose notches fit on the sleepers at the top of the posts. To screw. Until this point, an assistant is essential to maintain the structure.
The riders are also reinforced by easels. Always check their squareness before screwing. As soon as the central rider has received his, the structure no longer needs to be maintained.
Check the centering of the framework before its fixing on the ground, as well as the difference between posts on the same side: the possible decorative elements (benches, trellises, fences...) measure 180 cm long.
To fix the pergola on a wooden terrace, screws are enough. On a masonry floor, provide an anchor. The structure is flexible enough to allow a slight shift of its feet during drilling.
To give shade by shielding the rays of the sun, the top of the blades of the blinds must be turned towards the north. This structure can receive two jealousy end to end.
The manufacturer has planned to fix the jalousies by their sleepers. For aesthetic reasons, we preferred to turn these ties up. If screwing is more complicated, the decor gains in elegance.
With this type of inverted pose, only the blades are visible from below. Arrange for the plates to juxtapose along a rider: thus, the latter will conceal their line of junction.
The area covered by jalousies is deliberately limited to the back of the pergola, plantations then climbing on the front. In this second zone, the center distance of the riders is 35 cm.
A low fence inserted between the uprights furnishes the space and improves the rigidity of the whole. If you have to be safe from the neighborhood, bet on taller claustria boards.