Google review
ZTC built my house in 2012, and they have done some reclamation work in two periods since then. Only positive experiences with ZTC! Good quality of workmanship and customer support.
Insulation and comfort
Cellulose insulation in timber houses
ZTC installs industrial Isofloc cellulose and wood fibre insulation in controlled factory conditions, reducing the risk of gaps in the insulation layer.
ZTC experience and production facts
34+
years of experience
400+
completed projects
14
European countries
±1 mm
CNC precision
Insulation, indoor climate and sound
Cellulose and wood fibre insulation can positively affect indoor climate. Denser materials compared with mineral wool may help with sound damping, but the final result depends on the project and execution. A+ class depends on the whole building — see also energy-efficient timber houses and A+ solutions.
Insulation performance indicators
ZTC installs insulation in the factory, but final energy performance and comfort depend on the whole building solution and precise execution.
- Factory installation
- Controlled conditions
- Materials
- Cellulose / wood fibre
- Sound damping
- Project-dependent
Insulation is installed in the factory, reducing the risk of unfilled cavities.
Industrial Isofloc system for cellulose and wood fibre insulation.
Denser materials compared with mineral wool may help with sound damping, but results depend on construction.
What affects the final result
- Insulation layer and structural solution.
- Membranes, airtightness and on-site assembly quality.
- Windows, ventilation and building form — beyond wall thickness alone.
An energy audit is usually carried out at design stage to determine the appropriate solution before production.
What clients say about ZTC quality
Google reviews highlight ZTC’s precision, organised process and professional communication.
Google review
Ļoti profesionāls un ieinteresēts darbs no ZTC puses, lai maksimāli izpildītu klienta vēlmes mājas būvniecībā, ieguldot laiku visu detaļu precizēšanā, kā rezultātā pašas būvniecības laikā neko nevajadzēja koriģēt un ir tapusi patiesi kvalitatīva māja. Atzinīgus vārdus par mājas būvniecības kvalitāti saņēmām no visiem speciālistiem, ar kuriem sadarbojāmies vēlāk - liekot logus un durvis, jumta segumu un apdari. Paldies par paveikto un varam tikai ieteikt citiem izmantot ZTC pakalpojums māju būvniecībā! Pateicībā, Irēna un Janeks
What to consider about insulation
Industrial installation
Isofloc system in controlled factory conditions.
Material choice
Cellulose and wood fibre insulation according to the project.
Energy performance
U-value 0.12–0.15 W/m²K possible depending on construction.
Whole building
A+ class is not wall thickness alone — windows, ventilation and airtightness matter.
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View projectRelated topics
- Energy-efficient timber housesEnergy-efficient timber house solutions with ZTC structures, insulation and airtightness requirements adapted to the project.
- A+ energy-efficient timber houseA+ energy-efficient timber house: what determines the class and ZTC responsibility in construction delivery.
- Timber frame panelsTimber frame panel production at the ZTC factory in Latvia: from structural solution to transport and assembly.
Frequently asked questions
Questions about cellulose insulation, technologies and energy performance.
Would you like to discuss an insulation solution?
Send project information to review scope and construction.