Gessler & Bolch Insektenschutz Ag

What Gessler & Bolch Insektenschutz Ag does

Gessler & Bolch Insektenschutz AG is a privately held, family-owned German manufacturer founded in 1980 by Walter Gessler in Ilsfeld and led since 2005 in the second generation by Matthias Gessler. The company designs and produces custom-made insect protection screens for windows and doors (tension frames in 150+ variants, turn/pivot windows, roller screens, electric rollers, swing, self-closing, sliding and pleated doors) as well as basement light-well covers (LiSA, RESi, ELSA, TERRESA). Manufacturing is concentrated at the single Ilsfeld facility, which produces approximately 80,000 custom elements per year and is described by the company as one of the largest insect-protection producers in Germany; production uses powder-coated aluminum profiles with proprietary mesh systems including Transpatec (near-invisible, +140% air permeability), Polltec (>99% pollen block), V4A stainless steel rodent mesh, and E-Smog electromagnetic shielding.

The company has been a certified producer and strategic partner of NEHER — the German insect-protection market leader since 1978 — for over 25 years, giving it access to the NEHER 200+ frame system, the NEHER-App partner ordering platform, and a technical hotline. Revenue is generated through two parallel channels: direct-to-consumer (free on-site consultation, measurement, own delivery fleet) and a trade network of 1,000+ NEHER specialist tradespeople (Fachbetriebe) across Baden-Württemberg, Rheinland-Pfalz, Saarland, Hessen and parts of Bayern. Pricing is quote-based, transactional, and undisclosed publicly; products are one-off custom fabrications rather than subscriptions. The customer base consists almost entirely of individual residential homeowners and independent installation contractors, generating a long-tail revenue stream with no disclosed anchor customers. The company has won multiple industry awards including Plus X Award 2018 (Elektrorollo), R+T Innovation Award 2021 (Plissee), and is associated with the NEHER Marke des Jahrhunderts 2022 brand award, and holds a 4.9/5.0 Google customer rating.

Name

Gessler & Bolch Insektenschutz Ag

Legal name

Gessler & Bolch Insektenschutz AG

Website

https://gessler-bolch.de

Company type

Private

Founded year

1980

Operating status

Operating

Headcount range

1–10 employees

Short description

Gessler & Bolch Insektenschutz AG is a family-owned German manufacturer of custom-made insect screens and basement light-well covers, serving residential homeowners in southwestern Germany directly and through a 1,000+ partner installer network under a long-standing NEHER partnership.

Ownership category

akta.pro rank

Product category

Insect Protection Screens

NAICS

Blind and Shade Manufacturing (337920), Metal Window and Door Manufacturing (332321)

SIC

Metal Doors, Sash, Frames, Moldings & Trim (3442)

akta.pro primary industry

Screens, Storm Doors/Windows & Insect Protection Systems (IMADAIAK)

akta.pro secondary industry

Physical/Mechanical Controls (Sealing, Screens, Traps, Barriers) (HSAMALAI)

Keywords

• Custom insect screens
• Light shaft covers
• Window insect protection
• Pollen protection mesh
• Basement window covers

Headquarters

HQ city

Ilsfeld

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Marketing or Sales, Others

Revenue model

1. Custom-made insect screens and basement window covers: The company manufactures and sells custom-made insect protection screens and basement window covers. Products include tension frames for windows, swing and pivot doors, sliding doors, pleated screens, roller screens, electric roller screens, and specialty solutions for round arch windows, sloped windows, and special colors. Basement window covers include LiSA, RESi, ELSA, and TERRESA models. All products are made to order (Maßanfertigung) at their Ilsfeld facility.

Pricing tiers

Go-to-market motion3 records

Distribution channels3 records

Marketing channels6 records

Core offering

Gessler & Bolch Insektenschutz AG manufactures custom-made insect protection screens and light shaft (basement window) covers for residential windows, doors, and basement shafts. Products are made to order at the company's Ilsfeld facility from powder-coated aluminum profiles using specialized mesh types including Transpatec (nearly invisible), Polltec (pollen protection), E-Smog (electromagnetic shielding), and V4A stainless steel. The portfolio includes tension frames, roller and electric roller screens, swing/pivot/sliding doors, pleated screens, and four basement cover variants (LiSA, RESi, ELSA, TERRESA).

Product overview

Gessler & Bolch Insektenschutz AG is a manufacturer of custom-made insect screens and light shaft covers founded in 1980. The product portfolio centers on tension frames (Spannrahmen) in over 150 variants for windows, complemented by turn/pivot windows, roller screens (roller for standard windows, skylight rollers, and electric rollers), and door solutions including swing doors, self-closing swing doors (Pendeltüren), sliding doors, and pleated screens. Light shaft protection includes LiSA, RESi (rainproof), ELSA (flush-level insert), and TERRESA (for wooden terraces) models. The offering also encompasses special custom solutions for non-standard window shapes, various mesh types including near-invisible Transpatec, pollen protection (Polltec), electrosmog protection, and stainless steel rodent-proof mesh. The company operates as a certified partner of market leader NEHER and produces approximately 80,000 insect protection elements per year at its Ilsfeld facility.

Differentiator

Problem solved

Functional benefit

Brands

• NEHER-Partner: Certified partner of NEHER, the market leader in insect protection systems. Products are manufactured under NEHER brand including Transpatec, Polltec, and other specialized mesh systems.
• LiSA
• RESi
• ELSA
• TERRESA
• Isifix

Products and services

• Insektenschutz Spannrahmen (Tension Frame) Custom-made tension-frame insect screens available in over 150 variants for windows, with flexible mounting options that do not require drilling. Compatible with wood, PVC, and aluminum windows, designed for easy installation and removal.
• Dreh- und Pendelfenster (Turn and Pivot Window Screens) Insect screens for frequently used turn and pivot windows, featuring ergonomic handles, high stability despite low installation depth, and optional Transpatec mesh for near-invisible protection.
• Insektenschutzrollo für Fenster (Roller Insect Screen for Windows) Roller-type insect screens for windows and doors with simple design, slim form, adjustable roller shaft, integrated brake, and side brush guides that keep the mesh taut in wind.
• Insektenschutzrollo für Dachfenster (Roller Screen for Skylights) Specially designed roller insect screens for angled skylight installation featuring adjustable spring tension, side brush guides for wind stability, and easy one-hand operation that locks in any position.
• Insektenschutz-Drehtür (Swing Door Insect Screen) Swing-door insect screens for balconies and terraces with high stability, optional integrated pet flaps, sound-dampened closing with brush damping and concealed block magnets, and ergonomic handles.
• Insektenschutz-Pendeltür (Self-Closing Swing Door Screen) Self-closing swing door insect screens for balconies and terraces with bidirectional opening, automatic closing via tension springs, 120-degree opening angle, and optional pet flaps.
• Insektenschutz-Schiebetür (Sliding Door Insect Screen) Sliding-door insect screens for large openings, terraces, and balconies with height-adjustable rollers, stainless steel ball bearings for quiet operation, optional foot operation, and spring-loaded fall protection.
• Insektenschutz Plissee (Pleated Insect Screen) Pleated insect screens for doors with threshold-free design and minimal space requirement, suitable for openings up to 5x3.2 meters in the two-panel variant, and wind-stable due to tension cables. Awarded Innovation Award R+T 2021.
• Insektenschutz Elektrorollo (Electric Roller Insect Screen) Motorized electric roller insect screens for large openings featuring ZIP technology for wind stability, remote control operation, optional solar panel for energy-independent operation, and obstacle detection with auto-stop on the ER2 model. Awarded Plus X Award 2018.
• Klemmrahmen Isifix (Clip-Mount Tension Frame) Clip-mount tension frame system for drill-free installation from the interior side, featuring stainless steel clips, concealed grip, and slim 0.8mm flange thickness for windows with limited installation depth.
• Lichtschachtabdeckung LiSA (Light Shaft Cover LiSA) Light shaft cover providing protection against leaves, mice, and spiders for basement light wells, made with aluminum profiles and ROBUSTEC stainless steel mesh, available in custom shapes.
• Lichtschachtabdeckung RESi (Rainproof Light Shaft Cover) Rainproof light shaft cover protecting basement shafts from heavy rain while maintaining ventilation, combinable with LiSA for additional insect protection.
• Einleger-Schachtabdeckung ELSA (Flush-Level Basement Cover) Flush-level basement cover insert replacing old grating, made from aluminum profiles with GFK Rost for a trip-free surface and optional lift-out protection.
• TERRESA (Tread-Safe Terrace Light Shaft Cover) Tread-safe light shaft cover for wooden terraces with stainless steel mesh or aluminum expanded metal, serving as water drainage, slip protection, or revision opening on wooden decks.
• Insektenschutz Sonderlösungen (Custom Special Solutions) Custom special solutions including insect screens for angled windows, round arches, gable windows, special colors, corner cutouts for light shaft covers, and integrated pet flaps.

Named customers2 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature9 records

Partnerships

Two partnerships are on record, tiered core and minor.

• NEHERcoreStrategic or Co-development Partner · 1 January 1980NEHER is the market leader in insect protection in Germany since 1978. Gessler & Bolch has maintained a close partnership with NEHER for over 25 years. They are a certified NEHER partner and producer (zertifizierter Partner und Produzent). The partnership includes access to the NEHER product system (over 200+ frame models), NEHER-App for online ordering, technical support, and training. NEHER awarded Marke des Jahrhunderts 2022 (Brand of the Century).
• BDS SchozachtalminorOthersGessler & Bolch is a member of BDS Schozachtal (Business Association Schozachtal), supporting regional networking and business community engagement.

Scale indicators6 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Roma KG: German manufacturer of roller shutters, insect protection, and garage doors with a strong specialist-partner distribution model. Comparable to Gessler & Bolch in its combination of insect protection products, specialist Fachbetriebe partner network, and focus on residential renovation and new construction across Germany.
• Heroal (Johann Henkenjohann GmbH & Co. KG): Manufacturer of aluminum roller shutters, insect protection, sliding doors, and awnings sold through specialist dealers. Comparable as a fabricator of premium aluminum-framed insect protection systems distributed via Fachbetriebe in the German residential market.
• Beck+Heun GmbH: German manufacturer of roller shutters, awnings, and insect protection systems with a comparable custom-manufacturing approach and specialist dealer distribution. Overlaps directly with Gessler & Bolch on Lichtschachtabdeckungen and window-mounted insect screens.
• NEHER Systeme GmbH & Co. KG: Germany's market leader in insect protection systems (since 1978) and the brand behind Gessler & Bolch's entire product portfolio. NEHER defines the product system, certifications, and partner network that Gessler & Bolch operates within, making it the most directly comparable — and structurally tied — peer in the space.
• Warema Renkhoff SE: Germany's leading manufacturer of sun protection systems (roller shutters, awnings, exterior venetian blinds) that also offers integrated insect protection solutions. Comparable as a premium, technically engineered window-treatment manufacturer with broad product portfolios and a specialist dealer network serving residential renovation.
• Reflexa-Werke Albrecht GmbH: German manufacturer of sun protection (awnings, roller shutters) and insect protection products with a specialist-dealer model. Comparable in product overlap (insect screens for windows and doors) and mid-market residential renovation positioning.
• Alukon KG: German manufacturer of roller shutters, insect screens, and aluminum-framed window/door systems. Comparable in its emphasis on custom aluminum-framed insect protection products distributed through specialist dealers across Germany.
• MHZ Hachtel GmbH & Co. KG: German manufacturer of interior sun protection, insect screens, and window coverings with a specialist dealer network. Comparable as a premium custom-manufacturer of window-related products distributed via Fachbetriebe in the German residential market.

Regional players

• Schlotterer Sonnenschutz Systeme GmbH: Austrian manufacturer of exterior sun protection and insect screens primarily serving Austria and neighboring German-speaking markets. Comparable product portfolio (aluminum-framed custom insect screens, plissee systems) and similar specialist-partner GTM in a closely adjacent German-speaking geography.

Emerging players

• Insektenschutz Systeme Deutschland (ISD): Network of independent German insect screen specialists and small custom manufacturers serving regional markets. Comparable as a smaller, custom-focused producer in the same niche but typically without the NEHER-certified scale or 80,000-unit annual capacity that Gessler & Bolch operates at.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UCSNt44-DklAE4jrosY4V04g
• Facebookfacebook.com/GesslerInsektenschutz
• Instagraminstagram.com/gesslerbolchinsektenschutzag
• LinkedInlinkedin.com/company/gessler-bolch-insektenschutz-ag

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Gessler & Bolch Insektenschutz Ag