Guide coat a hood with plasterboard

Here are easy step-by-step instructions for coating a hood with plasterboard:

• Draw a project on paper, then proceed with a professional meter to calculate the measurements around the hood (height, width and depth of the structure you want to create) and to the subsequent transfer of data on the sheet itself, also choosing the style of the structure that you intend to achieve.

• Take the aluminum profiles and with a marker write the measures previously calculated on them. Cut the profiles according to the marked measurements with specific scissors for aluminum (dividing those that will make up the height, width and depth).

• Attach them to each other with 4.2x13 flat head teks screws (or with a punching pliers) inserting the vertical "upright" profiles to those placed on the perimeter of the chimney thus creating the skeleton of the cladding structure. Note: to fix the "guide" profiles that act as the perimeter of the structure, you can use double-sided adhesive resistant to high temperatures if you do not have the possibility to drill the surface, or expansion steel plugs.

• Fill the interspace of the profiles with insulating material (see the article below: "in depth") by forming a protective layer between the hood and the outside.

• Transfer the measurements taken at the beginning to the plasterboard sheets and draw the shapes of the walls on them with a carpenter pencil. Now, with a professional cutter, cut the shapes.

• Attach the pre-shaped slabs to the profiles with self-tapping screws, 3.5x25 nail tip with the help of a screwdriver with depth adjustment so as to cover all sides of the coating.

• Now proceed with the grouting of the joints and the heads of the screws and affix the micro-perforated paper on the corners, folding it with your fingers at 90 degrees after having moistened it.

• Then wait for the grout to dry and if necessary pass a second coat (see article on grouting and follow the instructions).

• Sand everything with a manual grinder by removing the excess grout present and flattening any discrepancies in the work.

• All that remains is to proceed to decorate and paint the newly created hood covering.

Tools and materials:

• High quality corrugated cardboard

• 4x4 cover cloth

• Meter (measuring tape or folding wooden meter)

• Construction pencil

•Felt tip pen

• Scissors for aluminum

• Punching tool

• Screwdriver drill with depth adjustment

• Professional cutter

• Hacksaw for plasterboard

• Manual grinder

• Magnetic level with vials

• SDS drill bit 6x110

• Brush

• Bowl

•Ladder

• Teks screws 4,2x13 flat head

• Black phosphated self-tapping screws with 3.5x25 nail tip

• "upright" profiles in aluminum

• Guide profiles in aluminum

• Rock wool or other insulation material.

• “red” plasterboard sheets or specific sheets for fire resistance works.

• Specific grout

• Painting or finishing coating

• Steel expansion bolts with diameter 6.

• Double sided tapes resistant to high temperatures.

Deepening

The hood insulation operation is fundamental.

To carry it out correctly, we will have to interpose insulating material between the hood and the plasterboard sheet of the coating just created (at the internal groove of the profiles).

There are several types of insulating material for sale each with its own performance capabilities. For this type of work, rock wool is certainly the most popular even if in recent years it is being replaced with even more resistant and easy to work synthetic materials.

The importance of doing this work with the utmost attention will be fundamental to avoid that, with the continued use of the hood, dangerous and unsightly cracks can be generated in the coating due to the temperature changes due to the heat produced.

Thanks to the new generation plasterboard sheets, capable of withstanding in some cases up to 900 degrees, many believe it is sufficient to apply the sheets without insulating material.

The danger of the intervention, however, suggests maximum attention and, therefore, it is strongly recommended to insert an insulation material of at least 2 or 3 cm.

ATTENTION: being this type of intervention very delicate, the advice is to contact a highly specialized company that can help you.

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