100% HEMP
RENOVATIONS AND EXTENSIONS
NEW CONSTRUCTIONS
OTRA, recognized specialist in the installation of natural materials with high added value.
Hemp materials are our spearhead with bio-sourced and ecological materials.
OTRA srl has acquired the experience and unique know-how on the market with its many construction sites, these are thousands of square meters laid to date, both in new constructions, and in renovations of heritage and exceptional buildings, as well as than in the industrial and private sector.
Thanks to this experience, OTRA srl has become a real player in the hemp sector and in ecological and bio-sourced materials.
OTRA srl offers in collaboration with different partners construction systems and insulation from hemp: "HEMPRO, MOBHEMP, Posts-Beams, CLT..."
Hemp has exceptional qualities in terms of energy efficiency, feelings and interior environment. This material is suitable for new construction, renovation or extensions.
In energy renovation and sanitation systems, we have different techniques that sustain the building optimally with hemp in combination or not with other natural techniques.
OTRA srl as an expert company in building pathology, masters the entire renovation and construction process, which often makes it possible to avoid problems that could be linked to the correlation between the different trades of a construction site. . It is a force for a guaranteed result for customers.
POLE-BEAM CONSTRUCTION:
HEMPRO or CUSTOMIZED SYSTEM
Start-up of an ISOHEMP HEMPRO construction site,
Concrete post-beam with 30 cm + 20 cm hemp blocks
Low carbon concrete post-beams *: perfect for low-energy constructions
Low carbon concrete * associated with the Hempro construction system constitutes a simple, ecological, fast, economical, personalized and efficient solution.
It meets your needs for modern homes with large openings. From single-family homes to buildings, including eco-districts, you can easily build
low energy , very low energy or passive .
In addition to this, you need to know more about it.
WE INTRODUCE CLINCKER-FREE LOW-CARBON CEMENT IN OUR BIO-BASED ACHIEVEMENTS FOR LOWER IMPACT AND HIGHER EFFICIENCY.
FOR MORE INFORMATION CONTACT US
Start-up of an ISOHEMP HEMPRO construction site,
Concrete post-beam with 30 cm + 20 cm hemp blocks
Start-up of an ISOHEMP HEMPRO construction site,
Concrete post-beam with 30 cm + 20 cm hemp blocks
Start-up of an ISOHEMP HEMPRO construction site,
Concrete post-beam with 30 cm + 20 cm hemp blocks
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Start-up of an ISOHEMP HEMPRO construction site,
Concrete post-beam with 30 cm + 20 cm hemp blocks
Construction OTRA HEMPRO system from ISOHEMP,
Facade coated and painted with lime. Supply and installation by OTRA
Construction OTRA HEMPRO system from ISOHEMP,
Facade coated and painted with lime. Supply and installation by OTRA
INTERIOR RENOVATION AND INSULATION
Sometimes the exterior facades cannot be changed because the aesthetic character of the house wants to be preserved or due to lack of space. Renovating your building from the inside is therefore an effective compromise between comfort, cost and an appropriate technical solution. Hemp blocks provide an effective and efficient solution in the management of technical challenges during a renovation by guaranteeing the preservation of the existing building.
Industrial building interior insulation in hemp blocks with lime plaster.
1300m2 of hemp blocks
600m2 of 12cm hemp blocks + filling of the slide 3 to 10cm . Realization OTRA / AD-mix sprl
Insulation of an orangery
Realization OTRA / AD-mix sprl
1600 m2 of interior insulation of a castle in 12 cm hemp blocks with PCS plaster, filling of slides from 2 to 8cm. 400m2 of cork for interior insulation
Realization OTRA / AD-mix sprl
Why is a lining from the inside of the building with hemp blocks recommended
Cut the walls from the cold by eliminating thermal bridges and possible condensation problems (dew points)
Moisture management at old material / new material interfaces
Take advantage of a straight support for the interior plaster
(straighten out plumb walls)Fix technical ducts
Provide good sound insulation
Keep thermal mass inside
Apply cabinets, sink and decorative items
In addition to this, you need to know more about it.
Why choose hemp blocks as a counter partition?
For humidity management
During a renovation, it is recommended to use breathable materials, resistant to condensation and not rejecting any volatile organic compound. The hemp blocks perpetuate the existing building and continuously regulate the humidity of the air thanks to a breathable wall permeable to water vapor. The block is placed in lining of the interior wall and allows, among other things, to insulate old brick / stone walls or damp walls. It is one of the only products that retains its insulating characteristics even in an environment with high humidity. The wooden floors are protected from condensation.
In addition to this, you need to know more about it.
Efficient thermal insulation
In winter as in summer, you seek to maintain a constant and pleasant temperature within your building. The hemp block meets this need by naturally regulating the temperature of your home thanks to its ability to diffuse the heat it has accumulated. Its great inertia protects against the cold in winter and heat in summer.
For their fire resistance
Non-flammable and fire resistant, hemp blocks provide fire resistance of 1 to 3 hours depending on the thickness of the block.
Significant sound insulation
Noise pollution is greatly reduced thanks to the specific properties of the product.
In addition to this, you need to know more about it.
An excellent phase shift
The phase shift is the time it takes the heat to pass through a material. The 30 cm hemp blocks have a 19 hour phase shift which is excellent! This will make it cooler in summer indoors and warmer in winter.
In addition to this, you need to know more about it.
A building material with high diffusivity
the diffusivity of the materials increases the comfort in terms of feeling which makes it possible to heat less for the same comfort, 1 ° less = to + -7% of energy not consumed! With the hemp block you can gain up to 21% additional energy thanks to the diffusivity effect.
Interior finish with lime on 600m2 of 12cm hemp blocks + filling of the slide 3 to 10cm
WOOD AND HEMP STRUCTURES
Hemp blocks and wooden constructions are the perfect combination
of a light construction with an insulating block providing great thermal inertia.
The advantages of timber construction
Building a wooden house guarantees a comfortable building and high energy efficiency. Some major advantages of a wooden construction:
speed of construction (no more than 2-3 weeks for the shell)
less risk of thermal bridges (wood more insulating than traditional masonry)
direct economic benefits (savings on foundations thanks to the low weight of the wood)
Lightweight wooden constructions therefore seem to be ideal for your project. However, they have a weakness: precisely because of their lightness, they are subject to significant temperature variations which seriously impact the control of consumption and the comfort of the inhabitant. It is therefore essential to combine lightweight construction with products with very good thermal inertia without losing the economic advantages of this type of project.
Oak structure for post-beam construction
with hemp block filling
WOODEN AND HEMP POSTS
Hemp blocks for wood post-beam construction
Used for industrial, office or residential projects, the wood post-beam system allows you to build large with reasonable budgets. Some projects combine concrete, wood and steel to benefit from the advantages of these different materials.
Fast construction with economic benefit
Opening up of living spaces
This constructive technique finds its meaning in modern and traditional housing projects offering non-partitioned common rooms with large openings to the outside.
3D plan of the typical house of OTRA sprl
Oak post-beam structure for a very low-energy construction with filling in hemp blocks.
Exterior finish in Eco-brick chips and lime plaster.
Interior finish in single-layer clay
Your advantages :
large volumes of living rooms
large glass openings (preferably to the south)
optimization of the use and consumption of materials
Result: contemporary and traditional buildings, economical and very comfortable!
In addition to this, you need to know more about it.
Why use hemp blocks in wood post-beam structures?
envelope and filling of the entire structure
efficient insulation
interior or partition masonry
lining of heavy masonry or prefabricated wall
fire resistance
Oak structure Emac in Wood by Emac invests our partner
Advantages of hemp blocks for wood post-beam constructions
Complete impact resistant walls with unmatched thermal, acoustic and fire protection performance
A unique, simple, quick to install and efficient filling product solution
In addition to this, you need to know more about it.
A perfect combination with wooden, concrete or steel structures
A wide range of block thicknesses to fill any type of structure and adapt to the constraints of your site
The possibility of inserting the frames into the enclosure without having to recreate an intermediate frame.
CLT STRUCTURE AND WOODEN FRAME
Construction of a CLT apartment building
and 700m2 30CM hemp blocks with lime finish
OTRA / AD-mix sprl
Construction of a building with CLT apartments and 30CM hemp blocks
OTRA / AD-mix sprl
This constructive system of cross-laminated timber panels, often referred to as “solid panels”, is used in all kinds of construction projects, both residential and non-residential.
Fast and solid construction
The advantages of CLT constructions
High rigidity of the construction
Simple and quickly mastered constructive knots
Very fast assembly of the construction: in a few weeks, it is possible to complete the closed shell of the building.
Just like the realization of a wooden frame construction, the use of hemp blocks associated with a CLT structure is possible both for interior and exterior lining.
In addition to this, you need to know more about it.
Advantages of hemp blocks
for the CLT outer casing
Perfect and rapid airtightness of the building
High thermal inertia thus avoiding any potential overheating problem
Excellent support for exterior finishes (cladding, plaster, etc.)
Advantages of hemp blocks
for the inner CLT casing
Very significant improvement in thermal inertia, which allows heating energy to be stored and the heat of the interior walls to be conserved
Water regulation
Very little resonance thanks to high acoustic absorption
Wide choice of plasters and glued or fixed finishes
No vapor barrier required
Lightweight interior walls
For an optimal result, an interior and exterior lining is recommended.
Hemp blocks for timber frame constructions
Hemp blocks are the best assets for light frame projects, both in the exterior and / or interior envelope and in partitions. They combine the advantages of excellent thermal inertia, high performance acoustic insulation and great finishing possibilities.
Fire resistance and reduction of exterior noise
Advantages of hemp blocks for the outer casing:
Failure of thermal weaknesses of the framework
No overheating in summer and no temperature drop at night
Significantly reduced exterior noise
Practical support for finishes
Construction of a building with CLT apartments and 30CM hemp blocks
OTRA / AD-mix sprl
Lime plaster for apartment building in CLT with 30 cm hemp block insulation: OTRA / AD-mix sprl
HEMP BLOCK PARTITIONS
Concrete post-beam constructions, many advantages
Homogeneity of the wall
Custom construction: The Hempro system meets many technical challenges and allows all types of projects to be carried out.
Time saving on site: a single insulating material, large and light, therefore installed quickly. Interior and exterior finishes applied directly to the masonry
Large volume of living rooms and large windows
Simplicity of construction: frames inserted into the enclosure without having to recreate an intermediate frame
Healthy and natural product
Results of constructions in load-bearing structure: contemporary, economical and very comfortable buildings!
Construction of 500m2 partitions in 15cm hemp blocks with PCS plaster, open steamed lime plaster: realization OTRA / AD-mix sprl