Manufacturing and installation of energy-efficient plastic windows and doors, as well as interior construction from Großheide in East Frisia

Tischlerei und Kunststoffbau Hardwig de Groot

Großheide, GermanyNew on Amplifa

1967Founded

4Employees (including owners)

EinzelunternehmenLegal form

OstfrieslandSales area

Hebeschiebetüren bis 10 m Breite, 2,7 mComponent sizes

About Us

Tischlerei und Kunststoffbau Hardwig de Groot is a family business from Großheide in East Frisia, founded in 1967 as a carpentry shop by Tjark de Groot and managed since 2000 by his son, Master Carpenter Hardwig de Groot. The company manufactures and installs energy-efficient plastic windows and doors based on the REHAU profile systems GENEO, Euro-Design 86 Plus, SYNEGO, and Brillant-Design, including tilt and turn doors and exterior doors made from the fiber-reinforced material RAU-FIPRO. The range is complemented by room doors, high-gloss ceilings, interior construction, stairs, floors, built-in cabinets, insect screens, and fences made of Accoya wood. The activities include energy renovations and new builds, including the replacement of windows while the building is occupied. Customers include private homeowners, architects, and public clients; the sales area covers all of East Frisia from Großheide, including Norden, Wittmund, Aurich, Emden, and Leer. Since 2016, the business has been a training company for young craftsmen.

Site: Großheide
Processes: Window manufacturing (plastic windows, REHAU GENEO profiles, Euro-Design 86 Plus, SYNEGO,, Tilt and turn door manufacturing (REHAU GENEO tilt and turn door system), Exterior door manufacturing (REHAU GENEO exterior door profile), Room door manufacturing, High-gloss ceilings, Interior construction, stairs, built-in cabinets, floors, insect screens, Fences made of Accoya wood, Window installation (including replacement while occupied, energy renovation and new build)
Materials: RAU-FIPRO, RAU-PVC (coextruded outer layer), PVC, Accoya wood, Wood, Triple-insulated glazing (Glass), Aluminum trim profiles, RAU-FIPRO (fiber-reinforced PVC)
Certificates: Training company (since 2016)
Founded: 1967
Employees: 4
Industries: Private homeowners, Architects, Public clients, Public clients

01
Consultation and individual window solutions
02
Manufacturing of elements to customer specifications
03
Installation and replacement of windows and doors
04
Service check, maintenance, and servicing

Materials and Substances

RAU-FIPRO

RAU-FIPRO (fiber-reinforced PVC)

Fiber-reinforced high-tech material for fully fitted REHAU GENEO profiles with high stability without steel reinforcement.

RAU-PVC

RAU-PVC (coextruded outer layer)

Coextruded outer layer for best surface quality of GENEO profiles.

PVC

Material of Euro-Design 86 Plus, SYNEGO, and Brillant-Design plastic window systems.

ACCOYA

Accoya wood

Used for fences and other wood works.

GLA-3

Triple-insulated glazing

Glass insert with a large rebate depth of 66 mm for 3-pane glazing.

ALU

Aluminum trim profiles

Option for color design of the window profiles.

Location

Großheide

Operations and Sales

Part weight / size: Tilt and turn doors up to 400 kg leaf weight
Lot size: Individual manufacturing to customer specifications
Materials: RAU-FIPRO, PVC, Accoya wood, Glass

Modern machinery (not specified in detail)

Components and Products

**GENEO Plastic Window**REHAU GENEO profiles · Residential construction/New build and renovation

**Doors (Exterior and Tilt and Turn Doors)**REHAU GENEO door systems · Residential construction

**Euro-Design 86 Plus / SYNEGO / Brillant-Design Windows**REHAU-PVC systems · energy-efficient renovation

Inside the production

Industries

Private homeownersArchitectsPublic clientsPublic clients

Processes & technical limits

Processes	Tolerance	Max. part	Weight	Lot size	Materials
Window manufacturing (plastic windows, REHAU GENEO profiles, Euro-Design 86 Plus, SYNEGO,Installation	–	–	–	–	RAU-FIPRO (fiber-reinforced PVC), PVC, Accoya wood, Wood, Glass (triple-insulated glazing), Aluminum trim profiles
Tilt and turn door manufacturing (REHAU GENEO tilt and turn door system)Installation	–	Elements up to a width of 10 m × up to a height of 2.7 m	Leaf weights up to 400 kg	–	RAU-FIPRO, Glass
Exterior door manufacturing (REHAU GENEO exterior door profile)Installation	–	–	–	–	RAU-FIPRO, Glass
Room door manufacturingInstallation	–	–	–	–	Plastic, Wood
High-gloss ceilingsInstallation	–	–	–	–	Plastic
Interior construction, stairs, built-in cabinets, floors, insect screensInstallation	–	–	–	–	Wood, Accoya wood
Fences made of Accoya woodInstallation	–	–	–	–	Accoya wood
Window installation (including replacement while occupied, energy renovation and new build)Installation	–	–	–	–	PVC, RAU-FIPRO, Glass

Additional services

Consultation and individual window solutionsInstallation and replacement of windows and doors while the building is occupiedService check/Maintenance and servicing of windowsInterior constructionHigh-gloss ceilingsStairsBuilt-in cabinetsFloorsInsect screensTraining company (since 2016)

Quality

Quality is ensured by the use of modern machinery and regularly trained specialists. Emphasis is placed on punctuality, reliability, and customer satisfaction.

Evidence	Großheide
Training company (since 2016)

History

1967
Founding of the family business by Tjark de Groot as a carpentry shop
2000
Takeover of the business by son Hardwig de Groot
2016
Entry as a training company for young craftsmen