Professional uPVC Door & Window Fitting
Expert installation of uPVC doors and windows
Professional uPVC Door & Window Installation in London
DWLG offers expert uPVC door and window fitting services for homes and businesses across London. Our professional installers ensure your new doors and windows are fitted to the highest standards, providing excellent thermal efficiency, security, and long-lasting performance. Whether you're looking to improve energy efficiency, enhance security, or simply update your property's appearance, we provide quality installations you can trust.
uPVC (unplasticized polyvinyl chloride) is one of the most popular materials for doors and windows in the UK, offering outstanding energy efficiency, low maintenance, durability, and exceptional value for money. With a wide range of styles, colours, and finishes available, uPVC products can enhance any property while reducing energy bills significantly. We install doors and windows from leading manufacturers including Rehau, Deceuninck, and Eurocell.
Why Choose DWLG for uPVC Installation?
- Expert Installation: Certified installers with 10+ years experience ensure professional fitting to building standards
- Quality Materials: We only fit uPVC products from leading, reputable manufacturers
- Energy Efficiency: Proper installation maximizes thermal performance and reduces heating costs
- Full Service: We handle removal of old frames, installation, sealing, and cleaning
- Long Warranties: Manufacturer guarantees plus our workmanship warranty give you peace of mind
- Competitive Pricing: Free surveys and transparent quotes with no hidden charges
Service Areas: Professional uPVC installation throughout London and surrounding areas within a 50-mile radius of Croydon.
Why Choose uPVC Doors & Windows?
Understanding the benefits of uPVC over other materials
⚡ Energy Efficiency
Modern uPVC frames with multi-chamber profiles and double or triple glazing provide excellent insulation, reducing heating bills by up to 30% compared to old single-glazed windows.
🧽 Low Maintenance
uPVC never needs painting or varnishing. Simply wipe clean occasionally with soap and water. No rotting, warping, or rust like traditional materials.
💰 Cost-Effective
Excellent value for money with minimal maintenance costs. Lower installation costs than timber or aluminium alternatives. Minimal upkeep over decades of use.
🛡️ Security
Multi-point locking systems and robust construction provide superior security. Reinforced frames resist forced entry attempts.
🌧️ Weather Resistant
Won't rot, warp, or corrode in any weather conditions. Maintains performance for 30-40+ years with proper installation and care.
🎨 Style Options
Available in dozens of colours and finishes including wood-effect options. Can be customized with various hardware and glazing choices.
Our Installation Process
Professional fitting from survey to completion
Free Survey
Professional survey of your property to assess requirements and take precise measurements.
Design Consultation
Discuss styles, colours, hardware options, and glazing to create your ideal solution.
Transparent Quote
Detailed quote with no hidden charges. You'll know exactly what to expect.
Professional Installation
Expert fitting by certified installers. Old frames removed, new installations sealed and tested.
Quality Check
All windows and doors tested for smooth operation, weathertightness, and security.
Handover
Full demonstration, aftercare advice, and warranty documentation provided.
uPVC Products We Install
Comprehensive range of uPVC doors and windows
uPVC Front Doors
Secure, energy-efficient front doors in various styles and colours to suit your home.
uPVC Back Doors
Durable back doors with excellent security features and thermal performance.
French Doors
Elegant uPVC French doors to connect your home with garden or patio areas.
Patio Doors
Sliding patio doors for easy access and maximum light into your home.
Casement Windows
Traditional side-opening windows available in various sizes and configurations.
Tilt & Turn Windows
Versatile windows that tilt inward for ventilation or open fully for easy cleaning.
Bay Windows
Beautiful bay windows to add character and space to your property.
Bow Windows
Curved bow windows for an elegant architectural feature.
Benefits of uPVC Doors & Windows
Why choose uPVC for your property
Energy Efficient
Excellent thermal insulation reduces heating costs and keeps your home comfortable year-round.
Highly Secure
Multi-point locking systems and robust construction provide superior security for your property.
Low Maintenance
uPVC never needs painting and is easy to clean with just soap and water.
Cost-Effective
Excellent value for money with long-lasting performance and minimal upkeep costs.
Weather Resistant
Won't rot, warp, or corrode in any weather conditions. Built to last for decades.
Versatile Styles
Available in many colours and finishes, including wood-effect options.
Sound Insulation
Double and triple glazing options provide excellent noise reduction.
Environmentally Friendly
uPVC is fully recyclable and helps reduce your carbon footprint through energy savings.
Common uPVC Installation Issues & Solutions
Understanding what goes wrong and how we fix it
❌ Poor Frame Installation & Air Leaks
Symptoms: Draughts around frames, cold spots, air movement even when closed, noticeable difference in room temperature near windows.
Common Causes: Inadequate sealing around frame edges, poor cavity installation, gaps left in cavity wall, installation shortcuts, frames not fully supported.
DWLG Solution: We use expanding foam sealant to fill cavities properly, ensure frames are fully supported on all sides, apply weather-tight backer rod and sealant, test each installation for air-tightness. Our installation method exceeds UK Building Regulations.
❌ Condensation Between Double Glazing
Symptoms: Moisture visible between glass panes, cloudiness that won't disappear, water droplets forming inside the sealed unit.
Common Causes: Broken seal on double-glazed unit, manufacturing defect, improper installation, thermal stress on the seal, age-related deterioration.
DWLG Solution: We source units from quality manufacturers with proper warranties. If condensation develops, we replace the glazing unit under warranty. Our installation ensures proper support to the sealed units to prevent seal failure.
❌ Doors Not Closing Properly
Symptoms: Door won't latch, hinges loose, frame not square, door hangs badly, gaps between door and frame vary.
Common Causes: Frame not installed square to building, incorrect hinge adjustment, frame deflection from impact, poor quality installation, subsidence.
DWLG Solution: We use laser levels and precise measurement during installation to ensure frames are perfectly square. Hinges are carefully adjusted post-installation. We check operation regularly and make fine adjustments as needed during warranty period.
❌ Water Ingress & Dampness
Symptoms: Water running down inside during heavy rain, damp patches on internal walls, pooling water on window sills, mould development.
Common Causes: Inadequate sill gradient, blocked weep holes, poor weatherproofing at frame edges, cracked frames, subsidence causing frame movement.
DWLG Solution: We ensure window sills have correct gradient for water drainage, install or clean weep holes in frame design, apply proper external sealants and weather bars, use cavity trays to direct water safely to weep holes.
❌ Hinge Problems & Stiff Operation
Symptoms: Doors and windows difficult to open or close, squeaking sounds, hinges visibly loose or damaged, uneven gaps.
Common Causes: Low-quality hinges, improper installation, hinges under excessive load, lack of lubrication, frame movement, impact damage.
DWLG Solution: We fit quality hinges matched to door/window weight. All hinges are precisely installed with correct weight distribution. We demonstrate lubrication techniques. If issues develop, hinge adjustment or replacement is covered under warranty.
❌ Locking & Security Issues
Symptoms: Key difficult to turn, locks won't engage fully, handle loose or broken, security concerns with weak lock.
Common Causes: Poor lock installation, misaligned frame causing binding, worn locks from excessive force, cheap locks fitted, frame distortion.
DWLG Solution: We install multi-point locking systems on all doors. Locks are tested repeatedly during installation. Frames are carefully aligned to ensure smooth lock operation. All locks include spare keys and lifetime adjustment under warranty.
Quality Brands We Install
We work with leading uPVC manufacturers
Rehau
Premium uPVC profiles with excellent insulation.
Deceuninck
High-performance frames in modern colors and finishes.
Salamander
Robust profiles focused on security and durability.
VEKA
Energy-efficient systems with strong eco credentials.
Kommerling
Trusted German-engineered uPVC for long-term reliability.
AluK
Hybrid and uPVC systems with sleek contemporary styling.
Internorm
High-spec solutions for premium thermal and acoustic comfort.
Schuco
Secure, architectural-grade frames with clean lines.
Our Installation Process
Professional service from survey to completion
Free Survey
We visit your property to measure and discuss your requirements.
Quote
Receive a detailed, transparent quote with no hidden costs.
Manufacturing
Your doors and windows are custom-made to your exact specifications.
Installation
Expert fitting by our experienced installers to the highest standards.
Completion
Final checks, cleanup, and handover with full guarantee documentation.
Why Choose DWLG for uPVC Installation?
Expert Installers
Highly skilled team with years of experience in uPVC installations.
Building Regulations
All installations comply with building regulations with certificates provided.
Comprehensive Guarantees
Long-term guarantees on both products and workmanship.
Competitive Pricing
Excellent value with transparent pricing and free quotes.
Clean Installation
We remove old products and leave your property clean and tidy.
Local Service
Based in Croydon, serving London and 50-mile radius.
uPVC Maintenance Guide
Keeping your doors and windows in perfect condition
🧽 Clean Regularly
Wipe uPVC frames monthly with mild soap and water. Use soft cloths to avoid scratching. Dry with a clean cloth to prevent water marks. Check sills and channels for debris buildup.
💧 Clear Drainage
Keep weep holes and drainage channels clear of leaves and debris. These holes allow water to drain properly. Blocked drainage is the most common cause of water problems.
🔧 Lubricate Hinges
Apply silicone lubricant to hinges twice yearly (Spring and Autumn). Use light machine oil on locks and closing mechanisms. Never use WD40 as it attracts dirt.
🪟 Clean Glass Properly
Use glass-specific cleaner for double-glazed units. Clean glass regularly to identify any seal issues early. Look for condensation between panes as a warning sign.
📋 Check Seals
Inspect weather seals around frames annually. These seals wear naturally and may need replacing every 10-15 years. Cracked or shrunk seals allow draughts and water entry.
🧪 Test Operation
Monthly, gently operate all doors and windows through their full range. Listen for unusual noises. Check that latches engage smoothly. Report any changes to your installer.
✓ Pro Tip: Proper maintenance extends the life of your uPVC to 40+ years. Most issues can be prevented with regular cleaning and lubrication. If you notice any problems, contact us for advice rather than attempting DIY repairs which may void warranty.
Frequently Asked Questions
Common questions about uPVC doors and windows
How long does uPVC last?
High-quality uPVC doors and windows typically last 30-40+ years with proper maintenance. Some premium systems may exceed 50 years. The lifespan depends on installation quality, maintenance, climate exposure, and usage patterns. DWLG installations are designed to perform for the entire expected lifespan with minimal maintenance.
Can uPVC windows be repaired or must they be replaced?
Most uPVC issues can be repaired rather than replaced. Hinge adjustment, lock replacement, seal renewal, and glass unit replacement are all straightforward repairs. Complete window replacement is rarely necessary unless the frame is severely damaged. DWLG provides repair services and can advise whether repair or replacement is more cost-effective for your situation.
What glazing options are available?
Standard options include single glazing (basic), double glazing (standard and recommended), and triple glazing (premium). Double glazing typically offers the best balance of cost and performance. We recommend A-rated energy-efficient glazing for best thermal performance. Options include laminated glass for security, tinted glass for privacy, and low-emissivity (Low-E) coatings for enhanced insulation.
How much will my energy bills decrease?
Modern uPVC double glazing can reduce heating bills by 15-30% compared to old single-glazed windows, depending on your property's current state and usage. Triple glazing in extreme climates may save 40%+ but often isn't cost-effective in UK climates. A-rated double glazing with proper installation provides the best value for most UK homes. Your savings depend on the percentage of your home's heat loss through windows.
What happens if a sealed unit fails (condensation between panes)?
A failed sealed unit cannot be repaired – the glass unit must be replaced. This is straightforward if you choose uPVC frames as designed. The individual glazed unit is removed and a new one fitted. Most manufacturers warrant sealed units for 10-20 years. DWLG includes this replacement in our warranty. Prevention through proper installation and maintenance is key.
How long does installation take?
Installation time depends on the number and type of doors/windows. A typical front door replacement takes 1-2 hours. Multiple windows in a room take 3-5 hours. Full house installations take 2-5 days. Weather is a key factor – we cannot install during heavy rain. DWLG will provide a specific timeline after your survey, and we always aim to minimize disruption to your home.
Do you offer Building Regulations certification?
Yes. All our installations comply with current UK Building Regulations and we provide certification as required. This is important for energy efficiency, thermal performance, and future property sales. DWLG installers are trained on Building Regulations requirements and we maintain detailed documentation of all work completed.
What warranty do you provide?
We provide comprehensive warranty including: manufacturer warranty on all products (typically 10 years), DWLG workmanship warranty (10 years on installation quality), and guarantees on repairs. All warranties cover defects in materials and workmanship. Glass and sealed units have separate longer warranties from manufacturers. Full warranty terms are provided with your installation documentation.
Ready for New uPVC Doors or Windows?
Contact us today for a free survey and quote