Name: Exterior renovation in Liège | Avenir Rénovations
Brand: Avenir Rénovations
Rating: 4.94 (31 reviews)

Why choose Avenir Renovations?

Single point of contact

Complete site monitoring

Online customer area

State aid management

Why renovate the exterior now?

A well-maintained exterior prevents leaks, slows down material wear, and reduces emergency interventions. It is also an opportunity to align the house with your uses: better insulation, efficient frames, a friendly terrace, and reliable outdoor lighting.

Protection & durability: you preserve the cladding and roofs from leaks while securing water drainage.
Energy & comfort: you gain warmer walls in winter, less overheating in summer, and better acoustic comfort.
Value & aesthetics: you enhance the first impression and harmonize colors and materials with the Liège style, the local environment, or the original architectural project of your house.

Working method: your exterior renovation in 5 steps

A clear process ensures quality and adherence to the schedule. Each step is documented and validated before moving on to the next.

Our areas of intervention in exterior renovation

Each building has its configuration: terraced house in the center, pavilion, apartment building. We adapt the method, materials, and phasing to the Liège context (access, terraced, co-ownership) for a smooth and clean site.

Facades: renovate and/or insulate

Precise diagnosis: crumbling joints, cracks (lintels, window frames), dirt, moisture in the lower walls.
Compatible cleanings: we choose nebulization or low-pressure sanding/hydrosanding, with localized tests and protections (frames, sidewalks); targeted biocides if necessary.
Masonry repairs: repointing (compatible mortars), selective brick replacement, correction of blue stone supports (slopes/drips).
Breathable finishes: depending on the substrate, we apply a siloxane/silicate paint or a mineral render (lime/silicate) to allow water vapor to diffuse and avoid blisters.
Energy option: insulating facade (ETICS) or ventilated cladding (fiber-cement, wood, composite) to combine performance and a new look.

Roofs & zinc work: waterproofing above all

Pitched roofs: clay/concrete tiles, slates (natural/fiber-cement), standing seam zinc; breathable under-roof screen, ventilation in eaves/ridge.
Flat roofs: bituminous membranes or EPDM in warm roof (vapor barrier, insulation, upstands at the right height), slopes ≥ 2 % and recalibrated drains.
Zinc work: gutters, downspouts, valleys, flashings (chimneys/skylights/roof frames) executed for reliable and durable runoff.

Exterior joinery (frames & doors)

Material advice : PVC/aluminum/wood according to look, performance, and maintenance; thermal/sound/security glazing.
Careful installation : sealing 3 levels : outside, protection against driving rain; at the frame level, continuous insulation to cut the thermal bridge; inside, air barrier to stop drafts. Clean thresholds and well-shaped water runoff.
Facade interface : coordination with plaster/ETICS/cladding to avoid thermal bridges and “broken” finishes.

Surrounding fit-out

Terraces : blue stone/ceramic stone/wood/composite; joints and textures suited to use (non-slip, maintenance).
Circulations : paths, pavers, low walls, stairs, drainage (slopes, gutters, drains).
Fences & gates : opaque or openwork, motorization if desired; outdoor lighting compliant with RGIE.

Additional works

Canopies / carports, small annexes (workshop/garden), base cladding, threshold adjustments, small masonry (copings, crowns).

Price of an exterior renovation in Liège (including VAT)

The amounts below are ballpark figures. A detailed quote always follows a visit, as the cost depends on the area, access (alleys, city center), the condition of the substrate, and the range of finishes.

Item	Price indication (including VAT)
Facade cleaning (nebulization/sanding), m²	12 to 30 €/m²
Compatible repointing, m²	30 to 70 €/m²
Breathable water repellent, m²	8 to 20 €/m²
Facade painting (prep + 2 coats), m²	25 to 55 €/m²
Render / finishing coat (substrate ready), m²	45 to 95 €/m²
ETICS – insulating facade (complete system), m²	120 to 210 €/m²
Ventilated cladding (fiber-cement/wood/composite), m²	180 to 350 €/m²
Roof renovation (excluding insulation), m²	80 to 160 €/m²
Flat roof (insulation + membrane), m²	100 to 190 €/m²
Roofing (gutters/downspouts/flashings), ml	25 to 60 €/ml
Frames PVC/aluminum/wood (installation included), m² glazed	350 to 900 €
Terrace (pavers/blue stone/sandstone), m²	60 to 190 €/m²
Rigid panel fencing, ml	45 to 95 €/ml
Scaffolding (installation + rental, week)	180 to 450 €

Note: for a dwelling over 10 years old occupied privately, the 6% VAT may apply in renovation if conditions are met.

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Urban Planning, PEB & Co-ownership (Liège / Wallonia)

Cleanings and repairs are generally exempt from authorization. In case of change of appearance (color, plaster, cladding), insulating facade (ETICS) or modification of roofing, a DUP (Prior Urban Declaration) or a PU (Urban Planning Permit) may be required depending on visibility and the area.

In co-ownership, facade and roofing are often common areas: decisions from syndic/AG, protection of common areas, schedules and logistics (elevator) are necessary. Regarding PEB, we document the work on the envelope (technical sheets, implementation photos) for proper recognition of gains.

We check if a DUP is sufficient (limited change) or if a PU is required (visible change of appearance), then prepare the documents (plans, photos, colors) and the method note.

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Why choose Avenir Rénovations Liège?

Entrusting your exterior to a local team means benefiting from a coordinated site, controlled interfaces, and measurable quality on each item.

Single point of contact for facade, roofing, frames, surroundings, and complementary works.
Transparent quotes: detailed lots, clear variations, phased schedule.
Controlled quality: waterproofing, fixings, slopes, joints; clean finishes; patch-cleaning tests, adhesion checks, waterproofing check-list before finishes.
Clean & secure site: protections, compliant scaffolding, tracked waste management, and daily cleaning of pathways.
Local after-sales service: adjustments, occasional repairs, maintenance advice.

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Frequently Asked Questions

Before you get started, it's normal to have questions about priorities, deadlines, permissions, and budget. Here are concise and useful answers for a project in Liège or elsewhere in the province.

What should be prioritized if everything needs to be redone outside?

First, the waterproofing (roofing/guttering), then the facade issues (cracks, joints, humidity). Next, if you aim for performance, the ETICS or a ventilated cladding coordinated with the frames. The surroundings (terrace, drainage) are addressed at the end to avoid rework.

ETICS, plaster, or cladding: how to choose?

The ETICS combines insulation and new rendering. A plaster on a prepared substrate refreshes without insulating. The ventilated cladding protects, stylizes, and facilitates maintenance (replaceable elements). The choice depends on your goals (energy/aesthetics/budget) and urban planning.

Should I replace the frames before or after an insulating facade?

The simplest option is often to install the frames before the ETICS, to ensure the continuity of the insulation and supports. We coordinate the interfaces to avoid thermal bridges and fragile finishes.

Can I live in the house during the work?

Most of the time, yes. We phase by facades/slopes, maintain circulation, install protections, and ensure daily cleaning. In a co-ownership, we inform neighbors of impactful phases.

How long for a “typical” exterior project?

From 1 to 3 weeks for a simple renovation; 3 to 6 weeks for an insulating facade of a single-family home; 1 to 3 weeks for an average terrace/pathway. A detailed schedule is provided upon validation.

Are grants and reduced VAT accessible?

The 6% VAT may apply in renovation (conditions to be checked). There are assistance programs for insulation (facade/roof) and sometimes for frames; we frame the process and gather the necessary documents (quotes, sheets, site photos).

Do I need to declare scaffolding on the sidewalk?

Yes, a road permit may be required depending on the footprint. We prepare the request (dates, plan) and organize the signage.

Can I group several lots (facade + frames + terrace)?

This is even recommended: it avoids rework, better manages the interfaces (ETICS ↔ frames ↔ thresholds), and reduces overall timelines thanks to a single schedule.

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