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 - Round Bay Jack, LINIAR LAN332

Regular price From £18.75

View details
Adjustable load-bearing structural support bay pole jack for UPVC/aluminium/timber windows, doors and construction - Round Bay Jack, EUROCELL BB42/11

(1)

Regular price From £18.75

View details
Adjustable load-bearing structural support bay pole jack for UPVC/aluminium/timber windows, doors and construction - Round Bay Jack, LINIAR LAN331

Regular price From £18.75

View details
Aluminium Bay Pole Reinforcement- 42mm

Regular price From £38.00

View details
Adjustable load-bearing structural support bay pole jack for UPVC/aluminium/timber windows, doors and construction - Round Bay Jack, REHAU TOTAL70

Regular price From £18.75

View details
Variable Angle Bay Pole Set (Deceuninck 2500)

Regular price From £60.00

View details
Adjustable load-bearing structural support bay pole jack for UPVC/aluminium/timber windows, doors and construction - Square Bay Jack, LINIAR LAN353

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, LINIAR LAN311

Regular price From £18.75

View details
Adjustable load-bearing structural support bay pole jack for UPVC/aluminium/timber windows, doors and construction - Universal Bay Jack, BB26/19.5

Regular price From £18.75

View details
Adjustable load-bearing structural support bay pole jack for UPVC/aluminium/timber windows, doors and construction - 135-160 Degree Round Bay Jack, REHAU 206760

Regular price From £18.75

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

Regular price From £18.75

View details
Adjustable load-bearing structural support bay pole jack for UPVC/aluminium/timber windows, doors and construction - 100-120 Degree Round Bay Jack, REHAU 206780

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