Read blogs Learn more

Privacy Policy FAQ

Free shipping over £200
11,000+ product variants
Order online 24/7

UPVC door fitting red composite UPVC door UK

Bay Window Jacks

(17 products)

UK-Made Bay Window Jacks for Compliant & Secure Installations

Ensure structural integrity and pass building regulations with our comprehensive range of professional-grade bay window jacks. Our UK-manufactured, heavy-duty support brackets are the essential solution for fitters, builders, and architects. Available in round, square, and 135-degree angles for full compatibility with UPVC, aluminium, and timber window systems.

Browse our range to find the perfect, compliant support for your project.

Adjustable load-bearing structural support bay pole jack for UPVC/aluminium/timber windows, doors and construction - Universal Bay Jack, AE10

Regular price From £18.75

View details
Adjustable load-bearing structural support bay pole jack for UPVC/aluminium/timber windows, doors and construction - 135 Degree Bay Jack, KOMMERLING SYNSEAL KOM135 MODEL 2

Regular price From £18.75

View details
Adjustable load-bearing structural support bay pole jack for UPVC/aluminium/timber windows, doors and construction - 120-150 Degree Round Bay Jack, REHAU 206770

Regular price From £18.75

View details
Adjustable load-bearing structural support bay pole jack for UPVC/aluminium/timber windows, doors and construction - Square Bay Jack, REHAU 206970

Regular price From £18.75

View details
Adjustable load-bearing structural support bay pole jack for UPVC/aluminium/timber windows, doors and construction - 135 Degree Bay Jack, KOMMERLING SYNSEAL SYN135 MODEL 1

Regular price From £18.75

View details

Support & FAQ

Help & advice to help you find products
Updates & tracking

Tracking available for all products
Returns & exchanges

Our process is seamingless
Price-match

Guaranteed on selected products