Why Comprehensive Carpentry Renovation Makes Sense
Comprehensive carpentry renovations are the projects that generate the most satisfaction for both client and manufacturer. When a single supplier handles everything — from windows to enclosures, solar protection and roof windows — the result is a coherent, coordinated and optimised whole that no combination of independent suppliers can match. This success story perfectly illustrates how a renovation planned with a global vision completely transforms a home.
The Starting Point: A 1980s Home in Granada's Zaidin
When the Martinez-Lopez family contacted us in September 2025, their 120 m² home in Granada's Zaidin neighbourhood had a common problem seen in many Andalusian homes: aluminium windows without thermal break installed in the 1980s.
Intense winter cold with constant condensation, unbearable summer heat even with air conditioning at maximum, excessive street noise, and energy bills exceeding €200 monthly in extreme months.
The Client's Brief
The family sought a comprehensive solution within a budget of €18,000 to €22,000, and wanted a single supplier to handle everything. That is exactly what we offer at Tecnisun: a 360° service from design through to installation and subsequent maintenance.
Technical Diagnosis: What We Found
| Element | Condition Found | Assessment |
|---|---|---|
| Window material | Anodised aluminium without RPT (1980s) | Very poor |
| Glazing | Single 4 mm glass (no chamber) | Very poor |
| Measured Uw value | 5.7 W/m²K | Very poor |
| Airtightness | Class 1 (worst). Noticeable draughts | Very poor |
| Hardware | Oxidised, with play, windows that won't close | Very poor |
| Quantity | 10 windows throughout the home | — |
Terrace and Loft
- Terrace: 15 m² south-facing with Sierra Nevada views, no solar protection or enclosure
- Loft: 25 m² under the roof, no windows (only an opaque skylight), used as storage
The Solution Proposed by Tecnisun
Block 1: 10 PVC Windows STRUGAL S8000 IQ
Tilt-and-turn, two-tone (white interior / anthracite exterior), double low-e glazing with argon and solar control. Uw from 0.8 W/m²K.
Block 2: INSTALLUX Enclosure
3-track lift-slide, 5 leaves. 5.00x2.50m. Double glazing with solar control. Motorised shutter with adjustable slats.
Block 3: 4 SAXUN ZIP Screen Blinds
Exterior screens for south and west orientations. 3% anthracite twill fabric. Tubular motor with solar sensor.
Block 4: FAKRO FTP-V Roof Window
114x140 cm centre-pivot, triple glazing (Uw 0.97 W/m²K), solar operation, blackout blind and mosquito screen.
Why We Chose These Specific Solutions
The selection of each product was carefully reasoned based on the home's specific needs:
- PVC for windows (not aluminium): top priority was thermal insulation due to Granada's continental climate. STRUGAL S8000 IQ PVC achieves Uw of 0.8 W/m²K, impossible to match with aluminium at this budget level.
- INSTALLUX aluminium for the enclosure: the terrace required large-format leaves (1.60m wide) that only aluminium allows with slim profiles. The lift-slide system handles 400 kg leaves effortlessly.
- Exterior ZIP screen blinds: more efficient than interior ones because they intercept heat before it reaches the glass. Essential for south-facing orientation, reducing solar gain by up to 85%.
- FAKRO for the loft: as exclusive distributors in Granada, we offer the most complete range and most specialised after-sales service for roof windows. The FTP-V P5 with triple glazing provides exceptional insulation even in the exposed roof position.
Project Challenges
Irregular openings with deviations up to 15 mm: each window was custom manufactured with millimetre-precise laser level surveying. Terrace with 20 mm level difference: special lower guide with integrated drainage. Loft roof: rafter reinforcement with load-bearing frame for the FAKRO window.
Material Selection for Each Climate Zone
Granada belongs to climate zone C3, characterised by cold winters with frequent frost and very hot summers. This dual extreme makes PVC the ideal choice for standard windows, as it offers the lowest Uw values per euro invested. For the terrace enclosure, aluminium was necessary due to the large leaf dimensions required. The FAKRO roof window benefits from PVC framing as the exposed roof position demands maximum thermal performance year-round, and the FTP-V model delivers exactly that.
Project Timeline
- Week 1: Workshop manufacture of 10 PVC windows and terrace enclosure
- Week 2: Removal of old windows and installation of new ones (3 days, team of 3 installers)
- Week 3: Terrace enclosure INSTALLUX (2 days) + FAKRO roof window (1 day)
- Week 4: SAXUN screen blinds (1 day), finishing touches, sealing and cleaning. Client handover
Results: Before and After
| Metric | Before | After | Improvement |
|---|---|---|---|
| Average window Uw | 5.7 W/m²K | 0.95 W/m²K | -83% |
| Annual energy bill | €2,400 | €1,350 | -€1,050/year |
| Acoustic reduction | ~15 dB | 47 dB | Total silence |
| Energy certificate | Letter F | Letter B | 4-letter jump |
| Property revaluation | — | +10-20% | Premium |
Itemised Budget
| Item | Cost (VAT incl.) |
|---|---|
| 10 PVC windows STRUGAL S8000 IQ | €9,800 |
| Terrace enclosure INSTALLUX 3-track | €5,200 |
| 4 motorised SAXUN ZIP screen blinds | €2,100 |
| FAKRO FTP-V roof window + accessories | €1,900 |
| Total project | €19,000 |
| Plan Renove subsidy | -€2,800 |
| Actual final cost | €16,200 |
Client Testimonial
"The difference is dramatic. The first winter after the renovation was a revelation: no condensation, no draughts, no cold. The heating bill dropped by half. The terrace has become our favourite room — we have breakfast there every morning looking at Sierra Nevada. The loft is now my office, with incredible natural light thanks to the FAKRO window. If we had known the difference would be this great, we would have done the renovation years ago."
Planning Your Comprehensive Carpentry Renovation?
At Tecnisun C.B. we accompany you throughout your renovation project: technical diagnosis, solution design, custom manufacturing and professional installation. Over 30 years transforming homes in Granada and Malaga. Request your free diagnosis or call 627 84 14 04. Calculate estimated costs on our price calculator.
See comprehensive renovations →Lessons Learned: Tips for Your Renovation
One supplier = fewer problems
When the same company manufactures windows, enclosures, blinds and roof windows, coordination is perfect and deadlines are met.
Measure twice, install once
Old building openings are NEVER perfectly rectangular. Professional laser surveying avoids surprises on installation day.
Apply for subsidies BEFORE starting
The Plan Renove requires applying before works begin. Many clients lose the subsidy by not respecting this requirement.
Solar protection from the start
It is much more economical to install SAXUN screen blinds during the renovation than afterwards.
How Much Does a Complete Carpentry Renovation Cost?
| Scope | Estimated Budget | Includes |
|---|---|---|
| Windows only (6-8 PVC units) | €4,500-7,000 | Windows + installation + old removal |
| Windows + blinds | €6,500-10,000 | Above + 6-8 motorised blinds |
| Basic integral | €10,000-18,000 | Windows + enclosure OR pergola + blinds |
| Premium integral | €18,000-30,000 | All above + roof window + full motorisation |
Use our price calculator for a personalised estimate based on your specific needs.
With annual energy savings of €1,050 and a subsidy of €2,800, the net investment of €16,200 pays for itself in under 15 years, while comfort and quality of life improve from day one. The energy certificate jump from F to B adds 10-20% to the property's market value.
Technical Details That Make the Difference
A successful carpentry renovation requires attention to many technical details:
Sub-Frame Management
In 1980s homes, original sub-frames are usually oxidised and deformed. At Tecnisun we always remove the old sub-frame and install a new aluminium one with thermal break. This adds €50-80 per window but guarantees perfect levelling, thermal bridge elimination, and optimal sealing.
Sealing System
We use a triple-barrier sealing system: interior vapour barrier (expanding tape or membrane) to prevent condensation, low-expansion polyurethane foam for insulation, and exterior neutral silicone with reinforcing mesh for weather protection.
Quality of Life Impact
Beyond the numbers, the true value of a comprehensive carpentry renovation is measured in quality of life. The most valued changes by the Martinez-Lopez family after 6 months:
Night rest
With 47 dB acoustic insulation, street noise completely disappears. Sleep quality improved "dramatically" according to the family.
Stable temperature
No more morning cold spikes in winter or afternoon heat in summer. The home maintains comfortable temperature naturally for more hours.
Goodbye condensation
Moisture stains on walls near windows disappeared completely. No mould, no morning dripping on glass.
Controlled natural light
SAXUN screen blinds allow working without screen glare but with natural light. The loft with FAKRO is "another world" in luminosity.
The Renovation Process at Tecnisun
Our 360° service means you deal with a single point of contact throughout the entire project:
- Free consultation: We visit your home, measure all openings with laser precision, assess the structural condition, and discuss your priorities and budget.
- Custom design: We prepare a detailed proposal with specific product recommendations, technical specifications, 3D visualisations, and a fixed-price quote with no hidden costs.
- Subsidy management: Before any work begins, we apply for Plan Renove and advise on IRPF deductions. This step is critical — applying after starting work disqualifies you.
- Workshop manufacture: All products are manufactured to measure in our Granada workshop. Average lead time: 3-4 weeks.
- Professional installation: Our own teams (never subcontracted) install everything in a coordinated sequence to minimise disruption. Average: 1-2 weeks for a complete renovation.
- Handover and warranty: Final inspection, cleaning, and documentation handover. 10-year profile warranty, 5-year hardware and installation warranty.
Does Your Home Need a Carpentry Renovation?
At Tecnisun C.B. we specialise in comprehensive carpentry projects. We analyse your case, propose the best solution, and handle everything: design, manufacturing, installation, and subsidy paperwork.
Request free technical visit →