Glazing installation only for trades
Already have windows, doors, bifolds, sliding systems or roof glazing on order? DF Installations can review fitting-only enquiries from builders, contractors and glazing suppliers working across Hertfordshire and North London.
You supply. We fit.
Already have windows, doors, bifolds, sliding systems or roof glazing on order? DF Installations can review fitting-only enquiries from builders, contractors and glazing suppliers working across Hertfordshire and North London.
Installation support for real projects.
The right service depends on your system, site and agreed responsibilities. Here are the installation packages we can discuss.
Customer-supplied windows
uPVC, aluminium, timber and specialist replacements fitted where specifications are suitable.
Contractor-supplied doors
Front, rear, French and selected internal aluminium doors.
Bifold fitting
System-led bifold installation into suitable prepared openings, including operation and alignment checks.
Sliding door fitting
Sliding patio systems, fixed side panels and thresholds according to supplier guidance.
Roof glazing fitting
Roof lanterns and roof windows with agreed roofing interfaces and safe access.
Site and material checks
Review the supplied product schedule, delivery, missing parts, opening readiness and installation access.
Built around trade priorities.
Keep your supplier relationships
Use your preferred manufacturer without requiring DF to supply the products.
Defined fitting-only pricing
Clarify whether unloading, lifting, trims, sealants, removals or making good are included.
Compatibility first
Avoid committing to fitting before checking the actual system and product details.
Trade scheduling
Discuss a realistic installation date relative to delivery and site readiness.
Installation only does not mean responsibility-free.
For customer-supplied products we need to establish who owns measurement accuracy, product defects, shortages, warranty issues, delivery damage, compliance paperwork and follow-up adjustments. A clear split protects the contractor, the end client and the installer.
Send the details
Tell us the project address, intended systems and what needs installing.
Review the specification
Share drawings, unit schedules, manufacturer details and access requirements.
Agree scope & timing
Confirm supply, lifting, installation interfaces, finishing, programme and compliance responsibilities.
Fit & hand over
Carry out agreed work, check operation and discuss any outstanding items.
Explore products and installation services.
Detailed information about the windows, doors and roof glazing we can discuss, plus our existing trade-relevant services.
Other ways we support contractors.
Trade installation in Hertfordshire & North London.
Based in Hatfield, we welcome suitable commercial and subcontract installation enquiries across Hertfordshire, selected parts of North London and nearby Bedfordshire. Share the project postcode to confirm travel and availability.
Frequently asked questions.
A few practical details to settle before appointing a glazing subcontractor.
Can you fit units we've bought online?
Possibly. Please provide the manufacturer, unit dimensions, installation instructions and full product schedule for review.
Who measures the openings for fitting-only work?
Measurement responsibility must be agreed before acceptance. We do not automatically accept liability for third-party dimensions.
Do you supply fixings and finishing materials?
That depends on the quoted scope. Agree fixings, packers, sealants, trims, sills and access equipment in advance.
Is every supplied door or window suitable?
No. Compatibility, condition, required documentation, access and structural readiness all affect acceptance.
What areas do you cover?
DF Installations is Hatfield based and considers projects across Hertfordshire, parts of North London and nearby Bedfordshire, subject to location, capacity and scope.
How do we request a trade quotation?
Use the enquiry page to share your company details, site postcode, drawings, planned timescales, product specification and the work you need completed.
Let's discuss your next project.
Tell us about your company, the site location, your products and your installation schedule. We can discuss whether the work is a good fit.
Request a trade quotation ↗