Ask the expert

attach a staircase

QUESTION: How do I attach a staircase in lightweight concrete?

Hello, I work as a constructor and product developer at Trätrappor Norsjö AB. Customers sometimes ask me how to attach indoor staircases of wood onto lightweight concrete walls. We usually recommend that you put OSBs of the same height as the room on the wall before attaching the staircase. Now I need ESSVE’s help to recommend a suitable screw! Ordinarily the wall attachment will carry a distributed load of 250 kg.

Thanks in advance!
Best regards, Fredrik Hakola, Trätrappor Norsjö AB

ANSWER: Use ESSVE’s lightweight concrete screw!

Hello Fredrik, You write that the distributed load will be about 25o kg. I assume that this weight will be allocated to about 12-20 points of attachment and that you want to hide the attachment and prefer a screw with a countersunk head. The load bearing capacity of a lightweight concrete screw depends on the quality of the lightweight concrete/ light clinker. But the lowest shear load is 30 kg and is applicable for lightweight concrete of the 500 quality and to screws with a diameter of 8 mm. I can also suggest a more coarse screw in our assortment, ”Lightweight concrete screw HL” that has a diameter of 10.5 mm.

Thanks in advance!
Sebastian Athler, technical expert on attachments

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Premium sealant

Premium sealant

New Product! Premium sealant for painters

After four years’ worth of product development we now launch a whole new range of painter’s sealant that will serve the carpenter and professional painter equally well. ESSVE ACRYLIC FLEX 25 % and ESSVE ACRYLIC FLEX 15 % both have a unique elasticity and handles motions between different materials in a revolutionizing way. These two acrylics are of the highest quality; except for outstanding flexibility they do not turn yellow, are environmentally friendly, are possible to paint over, are suitable for the Nordic climate with its great temperature fluctuations and are also available in several different NCS-conforming colors. Perfect for molding, sockets, panels and windows!

Super elastic painter’s sealant premium
ACRYLIC FLEX 25 % for professional sealing of gaps up to 25 millimeters wide. Perfect for molding, sockets, panels and windows.

  • • Ultra elastic
  • • Indoor/outdoor
  • • NCS-color conformant
  • • Available in transparent version

ACRYLIC FLEX 15% for professional sealing of gaps indoors that are up to 15 millimeters wide. Perfect for molding, sockets, panels and windows.

  • • Ultra elastic
  • • NCS-color conformant

ACRYLIC FLEX 10 % for painters & carpenters. Painter’s sealant that seals gaps indoors up to a width of 8 millimeter. Perfect for joints between different materials and to smoothen corners.

  • • Elastic
  • • Polishable

ACRYLIC FLEX 5 % seals gaps indoors, up to 5 millimeters wide. Perfect for joints between different materials and to smoothen corners.

  • • Polishable
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New “Arga snickaren”

Our very own Pirre is the new ”Arga Snickaren”

This week saw the season premiere of  Swedish TV-show ”Arga Snickaren”. This year it is hosted by the ESSVE-ambassador Per ”Pirre” Starrin and his side-kick Marcus ”Mackan” Nyhlén, known from Ernst Kirchsteiger’s show Sommar med Ernst.

”This is a dream gig on television for me. My attachments of choice will of course be the heavy weight ESSVE, a brand that both Mackan and I have 100 percent confidence in”, says Pirre.
Via the show, the public in Sweden will learn about the container concept ESS-CON, and Caroline Lundgren, marketing coordinator at ESSVE says that the collaboration is a given in more ways than one.

”Arga Snickaren” is one of Kanal 5:s all time most popular shows. Pirre and Mackan are also extremely provocative which adds a great deal to our brand.

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News! Activator for PU-adhesive & foam

Activator with booster functionality for faster and more effective through curing of PU foam, PU-adhesives and stone adhesives. Just spray it, apply the product and mount. The activator makes it significantly faster and provides a higher level of control of the curing process. It´s perfect for low temperatures when other foams have long curing time.. Is also excellent in airproof applications where humidity is low The product does not damage adjacent materials and does not leave stains.

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Woodscrew WAF

New woodscrew for excellent finish – puts the traditional log screw in the corner!

ESSVE Woodscrew with a flat, low and round head guarantees an excellent finish.

• Designed for a perfect result in beams and climbers.
• Very low head – ideal when an additional crossbar is mounted on top of the screw.
• Surface treated in C4 class – ideal for outdoor use in a Nordic climate.
• A better and stronger alternative to log screws in structural wooden constructions.
• The head’s large diameter provides a very high force to clamp

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