Valley Gutter Replacement at Hill House Offices, Norwich - OSB Boarding and GRP Fibreglass

Hill House Offices on Hill House Road, Norwich, needed a full valley gutter overhaul. Valley gutters run along the internal angles of a roof where two slopes meet and when they fail, water has nowhere to go except into the building.

This wasn’t a patch job. The entire valley gutter system around the building was stripped out and replaced properly by our team of roofers.

What the Job Involved

We cleared and stripped the existing valley gutter all the way around Hill House Offices, removing the old materials back to the structure. From there, the process was straightforward but thorough:

Full strip-out of the existing valley gutter system around the perimeter of the building
New OSB (oriented strand board) installed to create a clean, solid substrate
GRP fibreglass top coat applied across the full length to form a seamless, watertight finish

Commercial properties like Hill House Offices carry more risk from gutter failure than a standard residential job. A leak that goes unnoticed in an office environment can cause serious damage to interiors, electrics, and stock before anyone realises what’s happening.

Why Valley Gutters Need Attention

Valley gutters are one of the most vulnerable points on any roof. They carry a significant volume of rainwater, particularly relevant in Norwich, where the city sees around 600mm of rainfall annually. Unlike an exposed pitched roof surface, valley gutters collect water from two directions simultaneously. Debris builds up, joints age, and any weakness in the system becomes a direct route for water to penetrate.

Stripping back to the structure and starting fresh is nearly always the right approach on an ageing valley gutter system. Patching rarely holds long-term. This is why you need a skilled roofing team who has the right skills and experience to do a professional and long lasting job.

Why GRP Fibreglass for a Valley Gutter?

GRP is particularly well-suited to valley gutter applications. Because it’s applied as a liquid before curing to a hard, seamless shell, there are no joints, overlaps, or seams for water to work through. It bonds directly to the OSB substrate and handles thermal movement without cracking.

For a commercial building like Hill House Offices, where the roof needs to perform reliably year-round without ongoing maintenance calls, GRP is the sensible long-term solution.

About the Location

Hill House Road sits in a well-established part of Norwich, close to the Unthank Road area, one of the city’s busiest residential and commercial corridors. We carry out flat roofing and gutter work across Norwich and the wider Norfolk area, including jobs across the NR1, NR2, NR3, and NR4 postcode areas.

If you manage a commercial property in Norwich and you’re dealing with valley gutter problems, get in touch with the Point Roofing team. We’ll assess the full extent of the issue and give you a clear, honest quote.