gartenkueche bauen 8 Arbeitsplatte und Trempel bauen OSB Fermacell Venyl commaik.de 039 - Build your own garden kitchen - worktop and jamb

Build your own garden kitchen – worktop and jamb

Lesezeit 11 Minuten

After completing the electrics and water supply in my garden kitchen, it was now time to install the worktop.

In this post, I describe how I used OSB boards and Fermacell boards to create a stable and moisture-resistant base for the vinyl tiles.

These measures were necessary to make the worktop robust, scratch-resistant and easy to clean, so that it meets the requirements of an outdoor kitchen.


Initial situation and planning

I had built the walls of the garden kitchen from solid aerated concrete blocks and constructed matching niches with a height of 75 centimeters and a depth of 50 centimeters. My Napoleon PHANTOM P500 gas barbecue was to be permanently installed in the large alcove. I wanted to install the built-in BBQ furniture in the other niches.

The entire work surface, which I wanted to divide into a grill zone, water zone and work zone, was designed like a large U. I have described the details of how to lay the bricks in my article“Building your own garden kitchen – laying and gluing walls with aerated concrete“.

The worktop was to be installed above the niches so that it could rest directly on the aerated concrete blocks. The worktop had to be robust enough to withstand environmental influences such as UV light and increased humidity. It should also be stable enough to support the weight of the kitchen appliances without wobbling or shaking.

To the left of my gas barbecue, I wanted to install the sizzle zone, which was previously permanently installed on my Napoleon PHANTOM P500, directly into the worktop. The worktop not only had to bear the weight, but also be able to withstand the enormous heat.

 



 

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Which materials for the worktop of my garden kitchen

Originally, I wanted to brick the cupboards on the front of the jamb and close them with matching doors made of wood or stainless steel. However, due to the corona situation, there were extreme delivery difficulties with the materials I wanted, which meant that the original plans had to be adapted.

I therefore decided to build the interior of my outdoor garden kitchen with drywall profiles. The stainless steel metal profiles inherently offered a certain degree of protection against rust.

I further increased the resistance to moisture with zinc spray and bitumen tape, which I attached between the UW profiles and the concrete floor. Drywall profiles are lightweight yet offer high stability, making them ideal for use in protected outdoor areas.

They also enable flexible and fast installation, which was an advantage given the delivery difficulties.

 

The fronts should then be faced with 18 mm OSB boards. OSB boards (Oriented Strand Board) consist of several layers of wood chips glued lengthwise and crosswise, which gives them high stability and strength.

They are suitable for outdoor use as they are protected against moisture and UV light by special gluing. At the same time, they are very stable and extremely easy to work with.

However, OSB boards should always be well sealed to prevent moisture from penetrating, otherwise they can swell and lose their shape.

 

The OSB boards also formed the basis of my worktop. However, as I couldn’t tile directly onto the wooden boards, I decided to install an additional intermediate layer.

I chose Fermacell panels for this. Fermacell boards are made from recycled paper and gypsum and are reinforced with glass fibers, which gives them high stability and moisture resistance.

These boards are also suitable for damp environments and are relatively easy to process. They provide a smooth, stable surface that is ideal as a substrate for tiles or vinyl.

 

However, the use of OSB and Fermacell boards in outdoor areas involves a number of risks. Despite their moisture-resistant properties, OSB boards can swell and lose their structural integrity if exposed to moisture over a long period of time.

Although Fermacell boards are moisture-resistant, they can also be damaged if they are not properly sealed. To minimize these risks, I thoroughly sealed the OSB boards and also treated the Fermacell boards with a waterproof primer.

In addition, the joints and edges were carefully sealed to prevent water ingress.

 



 

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Installing drywall profiles in the garden kitchen

The installation of drywall is relatively self-explanatory and easy to implement with a little practice. I had already built a lot of drywall during the renovation of our Art Nouveau villa.

You can find suitable examples in my posts“Build your own toilet in the basement | drywall construction with plasterboard” and“Build your own estate agent’s office in the basement“.

Until now, however, I had only planked the walls with plasterboard. The planking with OSB boards was basically nothing else.

First, I built a substructure from the matching metal profiles.

 

Use of metal profiles

The metal profiles are available in various designs, lengths and widths.

For my garden kitchen, I used UW profiles and CW profiles with a width of 50 millimeters. UW profiles are horizontal profiles that are attached to the floor and ceiling, while CW profiles are installed vertically between the UW profiles.

I used an angle grinder, my Flex, with a thin metal blade to cut the profiles. As cutting with an angle grinder could damage the protective alloy of the metal profiles, I treated the cut edges with zinc spray after cutting to prevent corrosion.

I attached UW profiles at the bottom of the floor and at the top end and additionally protected the lower profiles with a 100-millimeter-wide bitumen tape, which I stuck to the underside and folded upwards over the sides. The bitumen tape was absolutely waterproof and stuck extremely well.

 

Structure of the substructure

CW-50 profiles were then used as upright profiles, which fitted exactly into the UW profiles. At the wall ends, I screwed the CW profiles directly to the wall.

I used these profiles to build a metal skeleton onto which I could screw the OSB board of the worktop directly from above.

I was also able to screw the OSB boards that went on the front directly to the profiles.

By keeping the right distance from the rear wall, I was able to build a large and continuous surface. The gas concrete blocks of the niches absorbed additional loads.

 

Processing the OSB boards

The worktop consisted of 18-millimeter-thick OSB boards. OSB boards (Oriented Strand Board) are made of wood chips glued lengthwise and crosswise and offer high stability and strength. They are protected against moisture and UV light and are very easy to process.

I used my Makita DHS660RTJ cordless hand-held circular saw to cut the OSB boards to size. Thanks to the rechargeable battery, the saw did not need a power cable, which gave me extreme flexibility.

I used my Festool PS 300 EQ-Plus TRION jigsaw for small cuts and curves.

 

Installing the OSB boards

Before I installed the OSB boards, I made a few preparations.

Firstly, I marked the positions of the aerated concrete blocks on the rear wall so that I could clearly determine their position even after the planking. Secondly, I have already drilled a core hole in the niche wall to the left of where my gas barbecue stands.

I wanted to feed the gas hose and the electric cable for the automatic ignition through here later.

Once everything was ready, I first laid the OSB boards on the substructure from above and screwed them in place.

Due to the tongue and groove system of the OSB boards, I had to calculate the cutting of the boards precisely beforehand so as not to make any mistakes. The entire surface was all the more stable afterwards.

Once the worktop was fully planked, I attached the OSB boards to the front. The panels were screwed directly to the metal profiles at a distance of a good 5 millimeters from the floor.

Only the front panel on the niche, which was to house my gas barbecue, was not screwed down. This plate had to remain mobile so that I could easily reach the grill later.

Here I needed a special solution that offered me an invisible mounting for the panel. But more about that later.

 



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Video: Build your own garden kitchen – building a jamb and worktop

While building my outdoor kitchen, I kept my camera running. I then published the individual stages in various films on my Youtube channel in a separate playlist for the construction of my garden kitchen.

I also filmed the construction of the jamb and the installation of the worktop and published it in my video.

If you want to see more of me and my projects, feel free to check out my YouTube channel.

 

Abonniere COMMAIK auf YouTube

 

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Installing Fermacell boards and vinyl tiles as a work surface

The garden kitchen was already looking really good at this point. The worktop was closed and the fronts were also planked with OSB boards.

Now all that was missing was the built-in BBQ furniture in the fronts and, of course, a stable, scratch-resistant and easy-to-clean surface. I originally wanted to tile the worktop.

Stoneware tiles are extremely abrasion-resistant and are also easy to clean. Unfortunately, at that time I lacked the necessary experience and tools for laying tiles – or rather for cutting the tiles to size.

But I had already considered another alternative: Vinyl tiles.

 

Reasons for the additional use of Fermacell boards

I also laid the Fermacell boards on top of the OSB boards because the adhesion and bonding properties of OSB boards are limited.

OSB boards have a relatively rough and uneven surface, which makes it difficult to bond vinyl tiles directly to them. In addition, OSB boards tend to swell when exposed to moisture, which can further impair the adhesion of adhesives.

By using Fermacell boards as an intermediate layer, I was able to create a smooth, stable and moisture-resistant base that was ideal for gluing the vinyl tiles.

 

 

Use and processing of Fermacell boards

Fermacell boards are made from recycled paper and gypsum and reinforced with glass fibers. This combination gives them high stability and moisture resistance, making them ideal for outdoor use.

Fermacell boards are available in different sizes; the ones I used measured 150 x 100 centimeters and were more manageable than the 250 x 125 OSB boards.

During processing, it should be noted that the panels must be cut precisely to ensure a perfect fit.

I first laid the Fermacell boards directly onto the OSB boards and checked the gap dimensions at the corners. For the cutting, I used my Makita DHS660RTJ cordless circular saw, which offered me a high degree of flexibility thanks to its battery operation.

I cut the edges cleanly and precisely. I then screwed the Fermacell boards directly to the OSB boards underneath.

In order to fit the Fermacell boards precisely to the front edges of the worktop, I took measurements from the OSB board of the kitchen front and drew a cut edge with an overhang of 10 centimeters on the Fermacell boards.

This overhang was important to obtain a clean and flush edge that would later support the vinyl tiles.

The panels were then sawn cleanly along these cut edges with my Makita circular saw.

 

 

Preparation of the surface

Once the Fermacell boards had been cut to size and screwed in place, I primed the surface with a suitable primer. This was important to ensure optimum adhesion of the vinyl tiles. While the primer was drying, I planned the installation of the vinyl tiles to minimize waste and achieve a symmetrical installation pattern.

 

 

Use and processing of vinyl tiles

Vinyl tiles are particularly suitable for use in damp environments as they are water-resistant and durable.

The tiles I used had a format of 60 x 30 centimeters. They have a click system that enables simple and stable connection of the tiles.

All I needed for processing was a cutter knife, which I used to score the tiles and then break them off at the cut edge.

Laying the vinyl tiles

My aim was to reduce waste and achieve a visually appealing laying pattern with symmetrical distances to the wall and the outer edge. However, the click system of the tiles only worked in one continuous direction, which made planning a little more complicated.

Ultimately, whole tiles should be positioned directly at the front. The 25 centimeter gap to the wall should then be covered by a second tile cut to size.

I was then able to use the remaining piece of the second tile as a wall piece on the opposite worktop, as the click system fitted here. In this way, I was able to optimize the waste.

Only on the middle area, my water zone, did the game no longer work. Here, some half tiles remained unused at the end.

Once the laying pattern was clear, I sprayed the substrate generously with the spray adhesive and laid the tiles.

With a light tap of my rubber mallet, I made sure the click connections clicked into place.

The work was completed in the evening.

The worktop surface of my garden kitchen was finished and I was already looking forward to installing the built-in BBQ furniture, installing my Napoleon PHANTOM P500 gas barbecue and, of course, installing my Sizzle Zone directly into the worktop of my garden kitchen.

 



 

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Summary and conclusion

In the last few days, I finished the electrics in my garden kitchen. Now it was time to install the worktop and the jamb. The worktop should accommodate the Napoleon PHANTOM P500 gas barbecue, while the side burner should be integrated into the worktop.

Due to the coronavirus situation, there were extreme delivery difficulties, which meant that the original plans had to be adjusted. I decided to build the interior of my garden kitchen with drywall profiles and construct a pre-wall from OSB boards and Fermacell panels.

The garden kitchen was made of solid gas concrete blocks, with matching niches for the gas barbecue and built-in BBQ furniture. The entire work surface was designed like a large U and had to be robust enough to withstand environmental influences such as UV light and increased humidity.

It also had to be stable enough to bear the weight of the kitchen appliances. I wanted to install the sizzle zone of the gas grill directly in the worktop, which also had to withstand the enormous heat.

For the fronts, I used 18 mm OSB boards, which are made of glued wood chips and are protected against moisture and UV light.

As the OSB boards have a rough surface and can swell when exposed to moisture, I also laid Fermacell boards to create a smooth and moisture-resistant base for the vinyl tiles. Fermacell boards are made from recycled paper and gypsum, reinforced with glass fibers, and are ideal for humid environments.

Vinyl tiles, which are water-resistant and durable, were glued to the Fermacell panels. They have a click system that enables a stable connection.

I planned the installation carefully to minimize waste and achieve a symmetrical laying pattern. I scored the tiles with a cutter knife and broke them off at the cut edge.

Finally, I stuck the tiles on with spray adhesive and used a rubber mallet to ensure that the click connections clicked into place.

In the end, the worktop surface was finished and I could look forward to assembling the built-in BBQ furniture, installing the gas grill and fitting the sizzle zone.

 


 

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My name is Maik and I have been writing this construction diary since 2008. In addition to my family and job, the expansion and renovation of our art nouveau villa is an important part of my life. Here in the blog I share my experiences. Attention: Some of the linked products are affiliate links. If you order the products through the links, I will be supported with a commission. This has no effect on your price.

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