INDUSTRIAL FELT PRODUCTS

The KH sealing strip for log building

The Koskenpää felt factory’s sealing strip is a superior sealing material for log construction. Whether you represent prefabricated house building, industrial log building, hand carving or just building for yourself, we are at your service. KH-tape is a safe choice for a variety of house solutions. As a log sealant, KH sealing strip is the best known and this log sealing strip guarantees durability for your log building. It is made of polypropylene and has superior properties

The KH sealing strip

Does not decay – it does not absorb water
Does not mold – there is no growth medium for it
Does not cause any allergic reactions: it does not contain poison nor dust

The Felt strip was also tested according to the M1 classification in 2007. The emission classifications for building materials are granted by the Building Information Foundation RTS.

As a cut-in-width product, the sealing strip is easy and quick to install. It is a light material that does not absorb humidity, so it can be installed in all weather conditions. Its light and elastic structure lives alongside construction movements. The KH sealing strip does not absorb the humidity – it preserves the breathable character of wood. 

The KH sealing strip is tested as long-lasting and fire-safe. (Tested by VTT (Technical Research Centre of Finland). It is durable sealing for log constructions and it controls buildings’ life-cycle costs. Polypropylene sealing is produced short-fibred, which allows easy penetration for dowels in log structures. 

KH sealing strip is also appropriate in all other constructions when you need a sealing material that endures humidity and has an elastic structure. In prefabricated building constructions, the sealing strip can be used for example in sill plates.

Using KH sealing strip

The sealing strip can be used between all types of logs and structures.

Basic widths: 40-400 mm

Most common thicknesses and square weights:
5-10 mm / 250-500 g/m2

The thickness of a porous material has big tolerances, so the material is determined on the basis of its square weight.

Most common square weights and corresponding thicknesses:

250 g/m²330 g/m²440 g/m²500 g/m²
4-5 mm7-8 mm9-10 mm10-11mm

Sealing strip can be used in seams of log structures and prefabricated buildings, in windows, door and wall frames, and between floorboards. The polypropylene excess strip is sold as per kilogram, which is handy for small sealing purposes.

KH factory also has a few corner-piece sealing models that are appropriate for log constructions and are also made of polypropylene. These corner sealings are a reliable and easy way to prevent leakage from corners. The corner pieces can also be tailor-made for different house types for professional builders. By agreement, we also offer corner pieces for specific measures and models. 

Polypropylene sealing for log structures was originally developed in cooperation with Honkarakenne and VTT and manufactured here in Koskenpää Felt Factory. Thousands of satisfied owners are enjoying leisure time in their Honkarakenne cottages and saunas, which are among others, sealed by using the KH sealing strip. Honkarakenne Oyj has used the KH sealing strip in their different buildings since the 1990s.

Development started in the 1980’s

The development of our polypropylene KH sealing strip started in the 1980s. This solution for timber sealing was outlined in collaboration projects, and during this development, the KH sealing strip’s suitability for log wooden structure was thoroughly tested. Consortium projects of research and development were launched in the 1990s, which involved Honkarakenne Oyj, Tikkurila Paints Oyj, Azko Nobel Coatings Oy and VTT.

The research and development work aimed to focus on the three-component log structure solutions and to find a healthy and sustainable model for log construction.  

The development work and follow-up research continued until the turn of the century, and the results clearly showed that the KH polypropylene sealing strip was an excellent choice for log structures. 

The main advantage of the KH sealing strip is its resistance to humidity; it does not absorb humidity, therefore it prevents individual spots from being burdened by strong humidity. The KH sealing strip preserves the breathable character of wood and helps the structure to release and divide construction’s humidity within natural seasonal changes – in the rhythm of the four seasons.