Lower spacer conductivity
Lower spacer conductivity supports improved Ψg and whole-window performance.
AlphaTherm® Pro · Made in Germany
Strength At The Edge
Precision-made warm edge spacers for high-performance insulating glass units.
0.14λeq W/(mK) · ift tested
EN 1279Tested for insulating-glass durability
8–20 mmStandard widths · larger widths by specification
6 ColoursStandard finishes · custom colours on request
Product Introduction
Performance, stability and seal protection
AlphaTherm Pro combines low thermal conductivity with stable construction and dependable barrier protection.
ConstructionABS reinforced with 30% glass fibre supports dimensional stability and precise frame processing.
Barrier protectionPremium Multi-Barrier Metallised Foil helps protect against gas loss and moisture ingress.
Processing & SupplyDesigned for existing IGU lines. Available in 5.1 m boxes or 6 m stillages.
Width Range8–20 mm standardLarger widths available by specification.
Why Warm Edge Matters
The perimeter shapes performance
The spacer may be a small component, but it runs around the entire glazing perimeter. Improving thermal performance at this critical edge helps reduce energy loss while maintaining the strength and processability required for reliable production.
Reduced edge heat transfer
A lower thermal bridge helps maintain more favorable room-side glass temperatures—warmer in winter and cooler in hot conditions.
Lower condensation risk
Improved edge temperatures help increase the margin to the dew point and reduce the risk of condensation.
Rigid warm edge systems
A focused range for real production
Choose by thermal target, processing route and the level of system support required.
AlphaTherm® Pro
Bending certification in progress · Target Q3 2026High thermal performance, dimensional stability and multilayer barrier protection for premium insulating-glass systems.
Product Details
Tecatherm® Low Psi
LiSEC bending certifiedA proven rigid warm edge platform for dependable bending, manual assembly and established production routes.
Product Details
Accessories
Matched components complete the spacer system for accurate frame assembly, connection and controlled gas filling.
Accessory DetailsWOLFTECH · Johanniskirchen, Germany
German warm-edge specialist
WOLFTECH develops and supplies rigid warm-edge spacer systems for insulating-glass manufacturers, combining thermal performance, production reliability and direct technical support.
Built Around Customers
Start with what matters to you
Technical information, product evidence and support organised around your role.
Technical evidence And Direct Support
Tell us your line. We’ll identify the fit
Share your equipment, widths and validation requirements with WOLFTECH.
Product range
Rigid warm edge systems
Two spacer platforms with matched connection components.
Selection guide
Choose by priority
λeq 0.14 W/(mK)
AlphaTherm® Pro
High thermal performance with dimensional stability and premium barrier protection.
Product details →
LiSEC bending certified
Tecatherm® Low Psi
A proven PP GF40 rigid warm edge platform for automated and manual processing.
Product details →System components
Accessories
Corner keys and linear connectors matched to WOLFTECH spacer dimensions.
Accessory details →Technical comparison
Compare the platforms
Compare thermal target, processing route, widths and available documentation.
| Technical point | AlphaTherm® Pro | Tecatherm® Low Psi |
|---|---|---|
| Material | ABS reinforced with 30% glass fibre | Polypropylene reinforced with 40% glass fibre |
| Equivalent conductivity | λeq 0.14 W/(mK) | λeq 0.155 W/(mK) |
| Profile height | 6.45 mm | 6.2 mm |
| Standard widths | 8–20 mm; larger widths by specification | 12–20 mm |
| Supply format | 5.1 m box or 6 m stillage | 5.0 m box |
| Processing position | Bending certification in progress; completion targeted by the end of Q3 2026 | LiSEC ZRC & ROC certified; Lombarda compatible |
| Best fit | High-performance IGU programmes seeking the lowest λeq in the WOLFTECH range | Established automated or corner-key production requiring documented bendability |
Technical values shown are product-level data. Final window or façade performance depends on the complete system configuration.
Warm edge technology
How the edge performs
The glazing perimeter affects heat transfer, surface temperature and condensation risk in double-glazed units (DGU) and triple-glazed units (TGU).
The third thermal zone
Frame, glass and the edge
Whole-window performance combines all three. The spacer influences the continuous edge where glass meets frame.
Whole-window context
Whole-window Uw combines spacer λeq with the selected frame, window dimensions and glass build-up.
Window thermal performance formula
Follow the sequence or select any contribution to inspect it.
Uw=Ag + Af
A lower Ψg indicates reduced heat transfer along the glazing edge.
Whole-window Uw calculation shown in accordance with EN 10077.
Practical effect
Cold edge and warm edge compared
In winter conditions, heat moves from the warmer interior toward the colder exterior. A lower-conductivity edge path limits that loss and helps keep the room-side glazing perimeter warmer.
In hot conditions, heat moves from the warmer exterior toward the cooled interior. A lower-conductivity edge path limits inward transfer and helps reduce the cooling load at the glazing perimeter.
Conventional aluminium spacer
The metal spacer maintains a strong thermal bridge, allowing a larger share of interior heat to continue toward the colder exterior.
The metal spacer maintains a strong thermal bridge, allowing a larger share of exterior heat to continue toward the cooled interior.
Higher energy lossHigher heat gainMore heat crosses the glazing edge.
Energy impactHigher cost
AlphaTherm® Pro
The heat-flow path begins contracting before the AlphaTherm Pro spacer and narrows to a fine line through the edge, limiting energy loss to the exterior.
The heat-flow path begins contracting before the AlphaTherm Pro spacer and narrows to a fine line through the edge, limiting heat gain toward the cooled interior.
Reduced energy lossReduced heat gainOnly limited energy crosses the glazing edge.
Energy impactLower cost
Conceptual comparison under equivalent conditions. Arrow width indicates relative heat transfer, not a measured project value. Overall energy savings depend on the complete IGU, window and building system.
Reduced energy loss
Lower edge conductivity reduces heat flow through the glazing perimeter.
Warmer interior surface
A warmer room-side edge increases the margin to the dew point.
Reduced summer heat gain
Lower edge conductivity also limits inward heat transfer; glazing and shading remain the main cooling factors.
Technical language
Five values worth knowing
Keeping product data and system data separate makes specifications clearer and comparisons more meaningful.
Equivalent thermal conductivity of the spacer profile. It is a product-level input, expressed in W/(mK).
Linear heat transfer through the combined glazing edge, expressed per metre of perimeter in W/(mK).
Heat transfer through the complete window, combining frame, glass and edge contributions in W/(m²K).
Heat-transfer coefficients for the glazing and frame portions used within the whole-window calculation.
Questions from project teams
Warm edge essentials
Why is the glazing edge more critical than the centre of the glass?
The glass edge contains the spacer and edge-seal assembly and sits next to the frame. This geometry creates a localized thermal bridge that is not represented by the centre-of-glass Ug value alone.
Does warm edge automatically prevent condensation?
No component can guarantee that on its own. Warm edge can raise the interior surface temperature at the perimeter and reduce risk, while indoor humidity, outdoor temperature, ventilation, frame design and glazing configuration remain decisive.
Is λeq the same as the Psi value?
No. λeq characterizes the spacer product. Ψg describes the heat transfer of the complete glazing-edge detail and therefore depends on the spacer, glass and frame interaction.
Can a spacer improve the complete-window Uw value?
Yes, through the edge contribution. The size of the improvement depends on the window dimensions and the selected frame and glazing system, so project-specific calculation is required.
Which documentation should a specifier request?
Use current product data, BF or project-specific Psi calculations, relevant EN 1279 evidence and product-specific processing or Passive House certificates where applicable.
High-performance rigid warm edge
AlphaTherm® Pro
Low thermal conductivity, structural stability and multilayer barrier protection.
Composite construction
Performance built into every layer
An ABS body reinforced with 30% glass fibre provides dimensional stability. A premium multilayer metallised barrier foil supports gas retention, moisture protection and dependable adhesion.
0.14λeq W/(mK), ift tested
6.45 mmProfile height
8–20 mmStandard widths; larger widths by specification
5.1 / 6 mBox / stillage availability
λeq is the equivalent thermal conductivity of the spacer profile. Project-specific Psi and whole-window values depend on glazing, frame and installation details.
Product benefits
Performance across the edge
Thermal performance
Low λeq supports improved Psi and whole-window U-values.
Dimensional stability
Glass-fibre-reinforced ABS supports precise frames and reliable handling.
Barrier protection
Metallised multilayer foil limits gas loss and moisture ingress.
Validation roadmap
Technical evidence
Standard finishes
Six colours for coordinated sightlines
Colour references are similar to the stated RAL shades, not identical. Request a physical sample before final specification.
Jet blackSimilar to RAL 9005Pearl dark greySimilar to RAL 9023Light greySimilar to RAL 7035Traffic whiteSimilar to RAL 9016Clay brownSimilar to RAL 8003Sepia brownSimilar to RAL 8014
Request AlphaTherm® Pro samples
Evaluate your required widths and colours under actual production conditions.
Proven rigid warm edge
Tecatherm® Low Psi
PP GF40 construction with certified bendability and documented BF thermal data.
Built for production
Strong, stable and ready to bend
Polypropylene reinforced with 40% glass fibre offers structural strength, low thermal conductivity and high fracture safety. The profile can be hot-bent or assembled with corner keys, supporting automated and manual manufacturing routes.
Discuss processing compatibility0.155λeq W/(mK)
6.2 mmProfile height
12–20 mmAvailable widths
5,000 mmProfile length
Processing
Validated for production
LiSEC certified
ZRC and ROC bending options for all listed widths in black.
Lombarda compatible
Auto-bendable processing for efficient frame manufacture.
Keys and connectors
Joined frames without special tooling.
Certification
Documented performance
Request Tecatherm® Low Psi samples
Evaluate your required widths and colours under actual production conditions.
System components
Accessories
Matched components for frame assembly, connection and gas filling.
System components
Connect with confidence
Corner keys, gas-filling keys and linear connectors complete the rigid spacer system. Components are selected to match the spacer platform, profile width and production method.
For an exact configuration, send us your profile selection and frame process. WOLFTECH will confirm the correct component and ordering reference.
Request a compatibility check
90° corner keys
Create consistent frame corners for cut-and-connect spacer assembly.
Gas-filling keys
Provide controlled access for gas filling before the aperture is securely closed.
Linear connectors
Join profile lengths while maintaining alignment through handling and sealing.
Production
For IGU manufacturers
Rigid warm edge systems for controlled, line-compatible production.
From specification to line-ready production
A clear route to production readiness
Define the target
Confirm thermal performance, profile width, colour and supply format.
Confirm the process
Review equipment, frame-building method, sealants and line compatibility.
Validate the setup
Review product documentation, production trials and processing results.
Support production
Work with WOLFTECH on ramp-up, troubleshooting, supply and optimisation.
What we clarify with you
Line-ready decisions
- EquipmentBending equipment, cutting method and frame assembly process
- IGU systemSealants, desiccant, gas filling and target durability
- PortfolioWidths, colours, profile lengths and packing preference
- ValidationTrial plan, processing documentation and operator feedback
IGU production flow
From spacer profile to finished IGU
Two alternative frame-building methods feed into the same core IGU assembly process. The precise order is adapted to the production line and equipment.
Prepare the profile
Cut the spacer to the required lengths and fill it with desiccant as specified for the selected system.
Build the frame
Hot bendingHeat and bend the profile to form the frame.
Manual processingCut, corner-key and assemble the frame.
Apply butyl and position
Apply the butyl seal and position the completed spacer frame on the glass.
Complete the IGU
Assemble the glazing, press, gas-fill, close, apply the secondary seal and inspect the finished unit according to the line process.
Line review
Before production approval, confirm cutting and bending equipment, spacer width, frame-building method, desiccant filling, butyl application, gas-filling route, secondary sealant and handling conditions.
Specification
For architects and specifiers
Clear edge-performance data for efficient, comfortable buildings.
Why the edge matters
Small component. Building-scale impact
Lower thermal bridging
Warm edge spacers reduce heat flow at the glazing perimeter and improve calculated window performance.
More interior comfort
Higher inside-edge temperatures reduce cold downdraughts and condensation risk near glazing.
Specification confidence
BF, EN 1279 and Passive House documentation support product selection and project review.
Specification checklist
Ask for the complete edge story
Spacer selection should be reviewed as part of the complete glazing and frame system—not as an isolated material value.
- Thermal performance dataλeq product data and representative Psi calculations
- DurabilityRelevant EN 1279 evidence for the edge-seal system
- CertificationCurrent Passive House and processing documentation by product
- AestheticsColour alignment with glazing, frame and façade intent
Window & façade performance
For window and façade companies
Improve system efficiency, comfort and visual quality across window and façade applications.
A stronger glazing edge
Performance customers can feel
Energy efficiency
Better Psi values support lower thermal transmittance across complete window and façade systems.
Condensation resistance
Warmer glass edges help reduce moisture and mould risk in demanding indoor conditions.
Design flexibility
Multiple colours support harmonious sightlines across modern frame and façade systems.
Commercial value
Make the invisible component understandable
A warm edge spacer supports a clearer customer story around comfort, condensation resistance and premium glazing quality.
- Product dataProvide accurate values to calculation and certification teams
- Visual choiceCoordinate spacer colour with frames and glazing aesthetics
- Sales languageTranslate edge performance into comfort and durability benefits
- Supply chainAlign the selected spacer with your insulating-glass partner
Partnership
For distributors
Build a WOLFTECH market with technical credibility and relevant customer access.
Partnership fit
What makes a useful first conversation
WOLFTECH is interested in partners who understand the insulating-glass value chain and can build durable customer relationships—not simply add another catalogue line.
Relevant customer network
Established relationships with IGU producers, window manufacturers, glass processors or façade-sector customers.
Application-led selling
Ability to discuss spacer selection, processing routes, documentation and the complete glazing-edge system.
Territory development
A clear view of target accounts, local competition, service expectations and realistic growth priorities.
Review process
Clear expectations from the start
Share your company, territory and customer focus.
WOLFTECH checks strategic and geographic fit.
Both sides explore products, support and market priorities.
Any next stage is agreed directly; no appointment is automatic.
Distributor interest
Tell us where you can add value
A short, specific introduction helps our sales team decide whether a conversation is useful for both sides.
WOLFTECH
Resilience meets precision
A German specialist in rigid warm edge spacer technology.
Made in Germany
Warm edge expertise from Johanniskirchen
WOLFTECH develops and supplies rigid warm-edge spacer systems for insulating-glass manufacturers, combining thermal performance, production reliability and direct technical support.
Product development, controlled manufacturing and customer-focused engineering come together at our facility in Johanniskirchen, Germany.
Careers
Join WOLFTECH
Explore opportunities or submit a general application.
Brand essence
The meaning behind WOLFTECH
One name brings together two complementary forces: the character of the wolf and the discipline of technology.
Wolf
Resilience · Teamwork · AdaptabilityThe European grey wolf represents long-term resilience, coordinated teamwork and the ability to adapt to changing conditions.
Tech
Precision · Innovation · PerformanceTech signals German engineering precision and continuous innovation in warm-edge spacer technology.
WOLFTECH
The strength and unity of the wolf meet the rigour of German technology—forming a reliable, long-term partner for insulating-glass manufacturers worldwide.
How we work
Focused on the edge. Built around customers
Manufacturing discipline
Stable processes, controlled quality and continual production improvement.
Technical partnership
Direct dialogue around processing, product selection and documentation.
Customer support
Direct commercial and technical engagement from product selection through production integration.
Careers at WOLFTECH
Build what performs at the edge
Join a specialist team developing and producing warm-edge spacer systems in Johanniskirchen, Germany.
Technical support centre
Documents, samples and testing
Select the support you need for AlphaTherm Pro, Tecatherm Low Psi or both products.
Customer requests
Select a request
Choose a request category, select the relevant product or products, and provide your business details. WOLFTECH will review and respond directly.
01 · SelectChoose support.
02 · SpecifySelect products and add details.
03 · ReceiveWe review and respond.
Product information
Product and safety information
Product and safety information
Technical data sheets, safety data sheets or both
Brochures
Product brochures
Product brochures
Current product overview, dimensions, colours and benefits
Thermal performance data
BF data sheets
BF data sheets
AlphaTherm Pro: in progress · Tecatherm Low Psi: available
Certificates
Bending certificates
Bending certificates
AlphaTherm Pro: in progress · Tecatherm Low Psi: available
Product samples
Sample request
Sample request
Request profiles for width, colour and processing evaluation
Test reports
Test request
Test request
Describe your test need so we can share relevant records or review a new test
WOLFTECH contact
Start with the right team
Choose the purpose of your enquiry. The form routes your request to the responsible WOLFTECH contact.
Data protection
Privacy information
How WOLFTECH handles personal information on this website and in business enquiries.
Staging-test statusThis notice describes the current staging release. Enquiry, document-request and careers forms transmit the information entered to WOLFTECH and store an internal request record. The site records the originating WOLFTECH page, the referring website hostname and any UTM campaign values supplied in the page URL with the enquiry. Audience analytics and marketing tracking remain disabled.
1. Controller
WOLFTECH GmbH
Sportplatzstraße 3
84381 Johanniskirchen
Germany
Email: info@wolftech-spacer.com
Telephone: +49 8564 222 9999
Privacy enquiries may be sent to the email address above.
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9. Version
Status: 15 September 2026. This information must be reviewed whenever the hosting, form, email, document-delivery, recruitment, analytics or customer-login workflow changes.
Legal notice
Provider information
Information pursuant to Section 5 DDG
WOLFTECH GmbH
Sportplatzstraße 3
84381 Johanniskirchen
Germany
Represented by
Managing Director: Christoph Schick
Contact
Telephone: +49 8564 222 9999
Email: info@wolftech-spacer.com
Commercial register
Register court: Local Court of Landshut (Amtsgericht Landshut)
Registration number: HRB 15551
VAT identification number
VAT identification number pursuant to Section 27a German VAT Act: DE337330223
Editorial responsibility
Responsible for journalistic-editorial content, where applicable: Christoph Schick, WOLFTECH GmbH, Sportplatzstraße 3, 84381 Johanniskirchen, Germany.
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WOLFTECH GmbH is neither willing nor obliged to participate in dispute resolution proceedings before a consumer arbitration board.
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