Project Overview

Homeowners in Harrow wanted to replace their old, draughty patio door and mismatched windows with a cohesive, modern set. The existing aluminium patio door was difficult to operate and let in cold air, while the surrounding windows had yellowed with age. The goal was to install white uPVC solutions throughout the rear elevation to improve thermal efficiency, security, and the overall look of the home.

Our Solution

We supplied and installed a complete white uPVC patio door and window package for the ground floor rear elevation. The solution included:

  • White uPVC patio door with slimline sills for easy garden access
  • Matching side-hung uPVC casement windows flanking the door
  • A-rated double glazing with argon gas fill for energy efficiency
  • Multi-point locking system on the patio door for enhanced security
  • Low-maintenance white profiles that will not yellow or warp
  • Reinforced frames for added strength and durability

Installation Process

  • Performed detailed site survey and measured all openings accurately
  • Removed old aluminium patio door and existing windows carefully
  • Disposed of all waste materials responsibly
  • Inspected and prepared sub-cills and lintels
  • Installed new uPVC frames using galvanised fixings and expanding foam
  • Fitted the patio door mechanism and tested smooth operation
  • Installed double-glazed units into window frames
  • Applied internal and external silicone seals for full weatherproofing
  • Adjusted all rollers, handles, and locks for perfect alignment
  • Cleaned all glass, frames, and tracks thoroughly

Multitrades Windows & Doors Benefits

  • Better thermal performance to reduce energy bills
  • Enhanced soundproofing
  • Secure locking systems
  • Easy-to-maintain materials
  • Compliance with latest UK building regulations
  • Durable materials that withstand UK weather
  • Aesthetics that match the home’s existing character
  • Expert installation with minimal disruption
  • Full warrantee for peace of mind
  • Outstanding customer support and care

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Our Showroom

You are more than welcome to visit our showroom.
We are open MON – FRI 8.00am – 4.30pm
SAT – By Appointments Only

For outside working hours or weekends appointments, feel free to call us on 01923238322 or email at [email protected]
We’ll be happy to meet up and discuss your Glazing, Windows & Doors Project

Multitrades Windows & Doors
Unit 1, Wiggenhall Industrial Estate, Wiggenhall Road, Watford, WD18 0FL
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Multitrades Windows & Doors offer End-to-End Service

At Multitrades Windows & Doors, we don’t just sell windows, doors & glazing. We manage the entire process from initial concept to completion.

  • Manufacture –We fabricate each door to precise specifications using original profiles and components. All doors are built in-house, ensuring strict quality control and fast turnaround times.

  • Supply –We deliver the chosen windows & doors directly to your site, anywhere in the region. Builders, developers, and homeowners trust us for reliable, on-time delivery and expert packaging to prevent transit damage.

  • Installation –Our experienced installation team ensures your  Doors and Windows are fitted with absolute precision. We manage all aspects, from structural alignment to weatherproofing and hardware setup. All installations come with Comprehensive 10 Year Guarantee, and we follow best practices to meet all relevant UK building regulations.

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