- Nordlichtstraße 42, 13405 Berlin
- Mo. - Th. 7.00 am - 3.00 pm - Fr. 7.00 am - 1.00 pm
Frequently aksed questions
DO YOU HAVE QUESTIONS ABOUT OUR SERVICES, WORKFLOWS OR CUSTOM PROJECTS?
Yes, on-site and in-depth – including 3D visualizations and a fixed-price offer.
As a master craftsman company in Berlin & Brandenburg, we always start with a personal consultation. We assess usage, floor plans, technical requirements, norms (DIN/EN, GEG), budget and design preferences. If desired, we provide 3D visualization of the proposed solution and prepare a transparent fixed-price offer – reliable, predictable, with no hidden costs.
Structured on-site analysis with photos, measurements and a detailed checklist.
We review room sizes, substrates, air supply/exhaust routes (HKI-List check for fireplaces), moisture levels, acoustic needs, and fire protection classes (e.g. F30–F90 in drywall). For facades, we also check insulation standards and possible damage. Everything is documented, ensuring secure planning, reliable scheduling, and accurate cost calculation.
Yes – after a short analysis, provided as a clearly structured fixed-price offer.
You will receive a detailed description of services (materials, execution, compliance with norms), defined milestones, a time schedule, and a fixed total price. Any changes or additional wishes are recalculated transparently so that your budget remains predictable.
Yes, we plan according to standards and take care of all approvals.
We check your unit against the HKI-List, plan in compliance with current DIN/EN norms, and coordinate with the chimney sweep and, if necessary, local authorities. At the end, you receive complete documentation for inspection and approval – safe, clean and legally compliant.
Certified branded products – durable, low-emission and DIN-compliant.
Depending on the trade: stainless steel/ceramic/lightweight chimneys, porcelain stoneware, natural stone, ceramic & vinyl, fire-rated gypsum boards, clinker, plaster systems & ETICS/WDVS. We select the most suitable system with you based on durability, maintenance, aesthetics, budget, and compliance with standards.
Yes, possible – with clear agreements and quality checks.
To guarantee warranty and compliance, we recommend our certified materials. If you want to contribute your own work, we define the interfaces clearly, so that quality, deadlines and safety remain assured.
Yes – for maximum planning security.
For tile/natural stone/vinyl projects we present formats, grout patterns and installation designs; for fireplace or drywall projects we visualize installations, proportions and junctions. Sample materials can be reviewed at home under real lighting conditions to help you decide.
Yes – technically sound, independent and practical.
We plan for maximum energy efficiency (optimized chimney draft, ETICS, acoustic insulation) and provide information on available subsidy programs (e.g. KfW/BAFA). For binding subsidy approval we recommend certified energy consultants.
Scope, materials, technology, substrate, accessibility and compliance requirements.
We calculate transparently: demolition, preparation (e.g. leveling or sealing), material quality, special detailing (large formats, fire protection, acoustics), disposal and logistics. Everything is included in the fixed-price offer, so you know exactly what to expect.
Yes – with dust-reduced methods, protective coverings and sectional execution.
Experience with renovation and refurbishment is part of our core expertise. We protect furniture and pathways, use dust extraction, phase the work in sections, and keep noise exposure as low as possible. This ensures your home remains as livable as possible during the project.
Usually within a few business days.
You can reach us by phone, WhatsApp Click-to-Chat, or via the contact form. We confirm your request promptly, send you a short checklist (photos/plans/requirements), and come fully prepared to the appointment – saving you both time and unnecessary follow-up visits.
Structured, step-by-step, with a fixed contact person.
We begin with consultation and planning, followed by a detailed site analysis. After that, you receive a fixed-price offer with clear milestones. The execution includes preparatory work (protection, demolition, substrate preparation), installation or construction, finishing, and final inspection. Finally, you receive documentation, guidance, and – if desired – a maintenance package.
Depending on the scope – from a few days for smaller repairs to several weeks for full-scale renovations.
We create a detailed time schedule at the beginning of each project. Minor repairs or partial refurbishments can be completed within a few days. Complex projects such as chimney construction, facade renovation, or full tile installation may take several weeks. With transparent scheduling, we ensure that you always know exactly when each stage will be completed.
Yes – we coordinate with your schedule.
We understand that renovation and construction can disrupt daily life. That’s why we offer flexible appointment planning, including partial day or phased schedules, and digital communication for status updates. This way, you can integrate the work smoothly into your routine.
Through dust-reduced work and protective measures.
We use dust barriers, furniture covers, and modern extraction systems to keep your home clean during construction. Our team works with precision and respect for your living space, ensuring that dirt, dust, and damage are kept to an absolute minimum.
We communicate transparently and act quickly.
Should structural problems or unforeseen conditions appear, we inform you immediately and present practical solutions. This way, you stay in control of your project, costs remain transparent, and delays are minimized.
With a documented handover and clear instructions.
At the end of the project, we conduct a joint walkthrough with you. You will receive a detailed handover protocol, instructions for operation and maintenance, and – if applicable – warranty documents. This ensures your system or installation is safe, functional, and future-proof.
Yes, we provide ongoing service packages.
After completion, we remain your reliable partner. We offer regular inspections, sealing and cleaning services, and repair packages tailored to your system – ensuring long-term efficiency and value retention.
With transparent and fair agreements.
We define the payment plan together with you before starting the project. Billing is milestone-based and clearly itemized, so you know exactly what you are paying for. This way, you maintain full cost control and transparency throughout.
Our focus is on Berlin and Brandenburg – but we’re flexible.
Most of our projects are based in the Berlin-Brandenburg region, but depending on project size and requirements, we also work in surrounding areas. Contact us for individual arrangements.
Stricter emission limits for carbon monoxide and fine dust.
From January 1, 2025, all fireplaces and chimneys in Germany must comply with new emission standards. These include lower thresholds for CO and fine particulate matter, which means that many older systems will either need to be upgraded or replaced. We check your unit against the HKI list and advise you on retrofitting options (filters, replacement inserts) or a full renewal. This ensures your system remains compliant, safe, and future-proof.
In many cases, yes – depending on type and year of construction.
Whether you need to retrofit depends on the age, type plate, and emissions performance of your existing system. Many older stoves and chimneys no longer meet the stricter 2025 emission thresholds. In such cases, retrofitting with filters, replacement firebox technology, or in some cases a new chimney is mandatory. We provide clear recommendations, cost transparency, and help you with the complete process – including documentation for approval.
It is the official register for approved fireplaces and chimneys.
The HKI list (Herd, Kamin, Industrie) is a national database listing all fireplaces and stoves tested for compliance with German emission standards. It is used by chimney sweeps, builders, and authorities as a reference point. If your unit is listed as compliant, you are on the safe side. If not, action is required – either retrofitting or replacement. We check this for you and explain the implications for your project.
They define safety, performance, and construction requirements.
DIN and EN standards ensure that fireplaces, chimneys, and stoves are safe, efficient, and legally approved. These include regulations for fire protection, exhaust systems, structural integrity, and material quality. For homeowners, compliance guarantees that the installation will be accepted by authorities and chimney sweeps. For architects and builders, it provides planning reliability. We work strictly according to current standards and document every step.
Whenever modern airtight houses or ventilation systems are involved.
In energy-efficient new builds or renovated properties with airtight building envelopes, a room-sealed (DIBt-approved) fireplace is often mandatory. This ensures that combustion air is drawn from outside and not from the living space, preventing negative pressure and safety risks. We advise you whether such a solution is necessary and offer certified systems that meet both technical and legal requirements.
In most cases, yes – depending on size, type, and location.
Permits are required whenever the structural integrity of the building is affected or when fire protection regulations apply. For example, external chimneys often require approval, as do larger wood-burning systems. We take care of the entire approval process, coordinate with the chimney sweep, and ensure that all legal requirements are fulfilled before construction begins.
They define how long a structure resists fire before failing.
Fire resistance classes are measured in minutes: F30 = 30 minutes, F60 = 60 minutes, F90 = 90 minutes. In drywall construction, these standards define how partition walls, ceilings, or cladding must be designed to contain fire. We implement certified systems according to the required protection level, ensuring safety for your home or business.
Strict requirements for thermal protection and fire safety.
External Thermal Insulation Composite Systems (WDVS) must comply with German energy-saving ordinances (GEG) and fire protection laws. This includes insulation thickness, fire resistance, and secure attachment to the building. We design and install facades that meet energy-efficiency goals, reduce heating costs, and comply with all legal standards.
Safe distances and non-combustible materials are mandatory.
To prevent fire hazards, fireplaces must keep minimum clearances from combustible walls, furniture, or floors. Additionally, a spark protection plate made of glass, steel, or stone is required in front of the unit. We calculate and implement all clearances according to DIN/EN standards and provide documentation for the chimney sweep.
Yes, it ensures safety, efficiency, and approval.
A draft calculation (Zugberechnung) determines whether the chimney provides sufficient suction for the connected fireplace. Without it, poor combustion, smoke backflow, or increased emissions may occur. It is also mandatory for official approval. We perform this calculation with certified software and integrate the results directly into your planning.
Through inspection, measurement, and official approval.
Before commissioning, the local chimney sweep inspects the fireplace and chimney, checks compliance with standards (DIN, EN, HKI list), and measures emissions. Only after this inspection can the unit be used legally. We prepare all documents, coordinate the appointment, and ensure smooth approval.
Ensure safe pressure balance and room-sealed operation.
Modern ventilation systems can create negative pressure in the room, which is dangerous for fireplaces drawing combustion air from inside. The solution is a room-sealed (DIBt-approved) unit or a safety pressure monitor. We advise you on the best option and ensure compliance with both fire protection and building codes.
All approvals, manuals, and maintenance instructions.
After completion and acceptance, you will receive a full documentation package. This includes the chimney sweep’s acceptance report, type plate details, user manuals, and recommendations for maintenance. This way, you are always on the safe side for insurance, inspections, and long-term operation.
The cost varies depending on the size, design, and chosen materials.
Factors include the type of fireplace (heating fireplace, tiled stove, pellet, or gas unit), cladding (natural stone, ceramics, plaster, concrete), and additional services such as chimney construction or water-bearing integration. After an on-site survey, you receive a fixed-price quote with a guaranteed completion date.
It depends on material, dimension, and installation conditions.
Stainless steel, ceramic, or lightweight chimneys differ in price, as do height, diameter, and integration into existing buildings. For renovations, demolition and adaptation work are included. After an inspection and draft calculation (draft calculation/zoning), you will receive a transparent cost estimate with a guaranteed total price.
The price depends on the material, surface, and substrate condition.
Large-format tiles, natural stone slabs, mosaics, or resilient vinyl each have different material costs and installation requirements. Additional costs may arise from leveling compounds, waterproofing, or underfloor heating systems. We provide a clear, fixed-price offer after reviewing room sizes and floor conditions.
It depends on the wall and ceiling system, fire resistance (F30–F90), and acoustic requirements.
Factors include system structure (single or double layer), insulation, acoustic ceilings/absorbers, connections/details, installation zones, doors, access panels, and surface quality (Q1–Q4). After a precise site measurement, you will receive an itemized calculation with a fixed total price and schedule.
The price is influenced by façade size, chosen system, and condition of the substrate.
Costs vary between external thermal insulation composite systems (ETICS), clinker brick slips, or plaster façades. Scaffolding, disposal of old plaster, and insulation thickness also play a major role. You will receive a transparent offer with a breakdown of materials and labor.
Yes, all our offers are binding and valid for 4 weeks.
Within this period, both price and timeline are guaranteed. If deadlines are exceeded due to planning changes, we will update the quote transparently.
Special materials, complex details, and additional services increase costs.
Savings are possible through standard formats, simpler cladding, or avoiding unnecessary demolition. We advise transparently where value and longevity outweigh short-term savings.
Scaffolding, waste disposal, and official permits may add to the cost.
We calculate these transparently and include them in the fixed-price offer. This way, there are no hidden costs during the project.
Yes, installment models are possible in consultation.
Payment plans are tailored to project volume and duration. We will provide details in your personal offer.
Yes, for energy-efficient renovation there are government grants.
This applies especially to thermal insulation composite systems (ETICS), heating modernization, or chimney retrofits. We advise on current programs and assist with applications.
In stages, according to project progress.
Typically: a deposit when the contract is signed, interim payments after milestones (e.g., shell construction, installation), and a final payment upon acceptance.
We document changes transparently and calculate them separately.
Any adjustments are first discussed and approved in writing. This ensures transparency and cost control for you at all times.
Yes, but only if they meet professional standards.
Poor execution often leads to rework, which can cost more. We recommend defining your contributions clearly and coordinating them with us in advance.
Yes, by arrangement and depending on project size.
For larger orders or multiple trades combined, we can grant attractive discounts.
We work with long-term suppliers and buffer our schedules.
Material shortages are anticipated through early procurement. In case of unforeseeable delays, we provide transparent communication and immediate solutions.
Yes – we rely on durable, recyclable systems and low-emission products in compliance with DIN/EN standards.
In Berlin & Brandenburg, we work exclusively with branded materials that convince through long service life and repairability: low-emission plasters/adhesives, recyclable metal profiles, durable porcelain stoneware/natural stone, ETICS/WDVS with certified system components. Wherever possible, we prioritize materials with Environmental Product Declarations (EPD) and plan so that maintenance instead of replacement is possible – saving both budget and resources.
The right system depends on usage, appliance, and building; ceramics excel in longevity, stainless steel in renovations.
Ceramic chimneys are extremely durable and thermally robust – ideal for new builds or long-term use. Stainless steel liners are excellent for the renovation of existing flues (fast, clean, resource-efficient). Lightweight chimneys are quick to install and structurally advantageous. We select the system that makes the most sense energetically, structurally, and ecologically – including draft calculation and coordination with the chimney sweep.
Yes – with proper installation and care, these coverings are among the most durable and resource-friendly options.
Natural stone is timeless, extremely robust, and can last for decades. Tiles made of porcelain stoneware or ceramics are resistant to moisture and easy to maintain. Vinyl is especially suited for renovations, as it can often be laid without demolition, saving waste and resources. Professional sealing and correct adhesives also ensure low emissions and long life cycles.
Yes – modern vinyl floors are emission-tested, recyclable, and moisture-resistant.
High-quality vinyl is certified for low emissions and often recyclable. Thanks to sealed surfaces, it is also highly suitable for bathrooms and kitchens. The major ecological advantage: vinyl can frequently be laid on existing substrates without demolition, significantly reducing construction waste.
We use certified, sustainable systems with a focus on efficiency and longevity.
Depending on the building, we recommend mineral wool, wood fiber, or EPS/XPS with EPD certification. These materials combine strong thermal insulation with fire safety and recyclability. The choice always depends on energy requirements, façade design, and local regulations.
Environmentally friendly sealers and impregnations extend the lifespan of surfaces and reduce the need for replacement.
We use water-based sealers, breathable impregnations, and eco-certified surface protection products. They protect natural stone, tiles, and clinker façades from moisture, dirt, and frost – significantly extending durability while maintaining ecological balance.
Yes – provided they meet technical standards and DIN/EN requirements.
If you would like to provide your own ecological tiles, natural stone, or special clinker, we check their suitability in advance. Important aspects: material certificates, fire safety, and processing properties. This ensures flawless workmanship and warranty.
Through dust-minimized systems, waste separation, and efficient logistics.
We use modern dust extraction, sealed work areas, and pre-cut system components. Recyclable waste is separated directly on-site. In addition, careful planning reduces excess material and unnecessary transport – for a clean, environmentally friendly construction process.
Pellet and water-bearing systems are considered particularly efficient and eco-friendly.
Pellet stoves are CO₂-neutral, programmable, and very efficient. Water-bearing fireplaces integrate into heating systems, improving energy use. Gas fireplaces score with clean combustion and low particulate matter. Modern wood stoves are sustainable when operated with certified wood and proper air supply.
Yes – fewer joints mean less grout, longer durability, and easier cleaning.
Large-format porcelain stoneware requires fewer grout lines, reducing maintenance and extending lifespan. Their robust surfaces make them highly durable. Transport and handling are slightly more resource-intensive, but the extended service life compensates ecologically.
Yes – clinker façades and insulation can be perfectly integrated.
We install ventilated clinker façades with insulation layers or combine clinker slips with ETICS. This ensures energy efficiency, weather protection, and a timeless appearance. The system always complies with fire safety, DIN/EN standards, and local building codes.
Ceramic systems often last for several decades, while stainless-steel liners are highly durable and easy to renovate.
The lifespan depends on operation, fuel type, condensate, and maintenance. We design cross-sectionally correct chimneys, avoid moisture and soot damage, and recommend regular visual and tightness inspections – ensuring your chimney remains safe and reliable for the long term.
With professional installation and regular care, several decades.
Key factors include the quality of the firebox lining, seals, glass, and operation. We use durable materials, advise on correct usage, and offer service packages (e.g. seal or glass replacement). This ensures efficiency and safety for many years.
An annual inspection is recommended; legally required sweeping/inspection schedules are set by the chimney sweep.
We check seals, glass, air intake/exhaust, clean components, and document any irregularities. This keeps emissions low, prevents damage, and ensures insurance-relevant compliance.
Gentle cleaning with suitable products maintains long-term beauty.
We recommend pH-neutral cleaners for tiles and natural stone, as well as manufacturer-approved vinyl products. Avoid aggressive agents that can damage surfaces. With the right care, your floors remain durable, hygienic, and aesthetically pleasing.
Depending on stress and exposure, every 5–10 years.
Joints are subjected to moisture, cleaning products, and mechanical wear. For optimal protection and appearance, we inspect joints during maintenance and replace them where necessary – particularly in wet areas or heavily used floors.
With proper installation and care, several decades.
Thermal insulation composite systems (ETICS/WDVS) require professional execution and correct material combinations. We recommend regular visual inspections and cleaning to maintain thermal insulation performance and façade appearance.
Minor cracks can usually be repaired quickly and without great effort.
Cracks may result from building movement or drying processes. Our experts assess the cause and carry out professional repairs – so that your drywall surfaces remain visually flawless and structurally sound.
Sealing, proper cleaning, and regular care are key.
Natural stone is durable but requires surface protection. With professional sealing, suitable cleaners, and care recommendations, we extend the stone’s life and keep its natural beauty intact.
If the structure is intact, renovation is often more economical.
Many fireplaces, chimneys, or façades can be upgraded to meet modern standards. We advise whether retrofitting (e.g. new inserts, insulation, sealing) makes sense – saving resources and budget while extending lifespan.
You receive a warranty on workmanship and materials in accordance with legal requirements.
We provide you with complete documentation and explain the scope of services. Additionally, we offer optional service packages that include regular checks, sealing, and minor repairs to secure long-term functionality.
Every few years, depending on environmental exposure.
Façades are exposed to weather, dirt, and biological growth. Regular cleaning and re-treatment (e.g. impregnation or coating) preserve both aesthetics and protection, ensuring lasting value for your building.
Visible soiling, odors, or poor draft are warning signs.
If smoke escapes into the room, deposits form, or unusual noises occur, action is required. We carry out draft calculations, inspect seals and ducts, and restore safe operation quickly and reliably.
Write us a message or call us directly. Our friendly staff will be happy to help you.
030 39240-47
info@gersdorf-gmbh.de
