This is the single most technically specific aspect of re-roofing in Fishponds and the one most likely to create problems if it's handled carelessly.
When a Velux rooflight was installed in a Fishponds loft conversion during the 1990s or 2000s, the conversion builder fitted a purpose-made Velux flashing kit around the unit — a lead or proprietary flashing collar that integrates the frame into the surrounding slate and creates a weathertight junction. This flashing kit was designed for the specific Velux model installed and for the thickness and gauge of the surrounding slate.
When the main roof is stripped for re-roofing — slate and battens removed down to the rafter — the existing Velux flashing is disturbed. The surrounding slates are removed. The flashing collar may need to be inspected, repaired, or replaced depending on its condition and age. The new slate covering then needs to be re-laid around the Velux frame, with the flashing correctly integrated into both the new slate courses and the frame sealing.
If this is done correctly, the rooflight performs as designed for another 20+ years. If the existing flashing is just left in place without inspection, or if the new slate is simply relaid around it without correct step flashing at the sides and apron flashing at the base, the junction fails within the first significant rainfall.
We inspect every Velux installation as a specific element of every Fishponds re-roof survey, confirm the flashing condition, and specify the correct integration approach — whether that's reinstating the existing flashing, upgrading to a new proprietary flashing kit, or replacing an aged unit where the frame itself has deteriorated.
Reclaimed Welsh Slate Re-Roof with Velux Integration
For Fishponds' Victorian terrace stock on the Fishponds Road corridor — the correct material and the correct technical approach for properties with existing loft conversion rooflights. Matched reclaimed Welsh slate installed around correctly assessed and specified Velux flashings. Every rooflight junction surveyed and quoted as a separate line item.
Natural Slate Alternative with Velux Integration
Where reclaimed Welsh slate isn't available in adequate volume or where budget is a primary consideration, new natural Spanish slate with correctly integrated Velux flashings. Visual differences discussed transparently before commitment.
Concrete Interlocking Tile Re-Roof — Post-War and Interwar Stock
Full strip and re-roof on Fishponds' wider residential streets in modern concrete or fibre cement interlocking tile. Velux integration on post-war properties where conversions have been carried out uses manufacturer-specific flashing kits matched to the existing unit model. Dry ridge and dry verge as standard.
Velux Replacement Within a Re-Roof
Where an existing Velux unit is at or past its practical lifespan — frames showing deterioration, glazing seals failed, or the unit predating current energy efficiency standards — we replace the unit simultaneously with the main re-roof. This is significantly more cost-effective than returning to install a new unit after the roof covering is in place.
Flat Garage Roof Recovery
Post-war and interwar properties across Fishponds' residential streets almost universally have flat-roofed garages in ageing felt. We recover in EPDM rubber — 20-year material warranty, cold-applied — simultaneously with any main re-roof while scaffold is in position.
Full Structural Timber Assessment
On Fishponds' Victorian terraces where loft conversions have involved structural alterations to the roof timbers — trimming, insertion of steel beams, modification of the ridge — we assess the full structural picture once the covering is stripped before specifying the new roof.
Fishponds' loft conversion stock spans roughly 30 years — from the earliest conversions in the late 1980s to those carried out in the 2010s. The Velux units from different eras have different ages, different frame conditions, and different flashing specifications. Here's how we assess them:
1988 to 1995 installations — these units are now 30 to 37 years old. The original timber frames on early Velux models from this period are frequently showing deterioration at the corners and frame-to-sill joints. We recommend unit replacement simultaneously with any re-roof on properties in this bracket.
1995 to 2005 installations — these units are 20 to 30 years old. Frame condition is variable. We assess each unit individually — sound frames with failed flashings can be retained with new flashing kit installation; frames showing corner deterioration should be replaced.
2005 onwards installations — these units are 20 years old or less. In most cases the frame condition is sound and the flashing is the only element requiring attention during a re-roof. We inspect, confirm condition, and reinstate or upgrade the flashing as appropriate.
The age assessment and unit condition report is part of every Fishponds re-roof survey. You'll know exactly what's recommended for each Velux before we quote.
My property has three Velux windows from a loft conversion — do they need replacing when I re-roof?
It depends on their age and condition. We assess every unit during the survey and give you a clear recommendation. Units from before 1995 we typically recommend replacing simultaneously with the re-roof. Units from 1995 to 2005 we assess individually. Units from 2005 onwards we typically retain and refit with new flashing where needed. Replacing units simultaneously with the re-roof is significantly cheaper than doing it separately later.
My loft conversion Velux was leaking before I decided to re-roof — is that because the flashing has failed?
Yes, almost certainly. Velux rooflight leaks are almost always flashing rather than the glazed unit itself. During the re-roof, we strip the existing flashing entirely, assess the unit frame condition, and either reinstate with a new proprietary flashing kit or replace the unit if the frame has deteriorated.
Can you match the Welsh slate on my Fishponds Road terrace?
In most cases yes. We carry reclaimed Welsh slate and source specific grades and thicknesses for matching work. We won't substitute Spanish slate without discussing the visual difference with you first.
How does the re-roof affect the loft conversion bedroom during work?
The loft space is accessed during strip-out to confirm the condition of the structural timbers and to assess the Velux units from below. The room is temporarily unusable during the strip phase — typically one to two days. The room is reinstated and weathertight as the new covering goes on above it. We always ensure the property is weathertight at the end of every working day.
Do you offer same-day emergency callouts in Fishponds?
Yes. Call 0117 370 9986 for same-day emergency response across BS16.
Loft conversion property with Velux units to integrate, Victorian Welsh slate terrace reaching re-roofing point, or post-war concrete tile that's past its serviceable life? Call Thomas. Free 4K drone survey with every Velux unit assessed, fully itemised written quote.
We don’t just "patch leaks." At TD Roofing we deliver engineered solutions specifically designed to withstand the high-velocity winds of the Severn Estuary. Every project is executed strictly to BS 5534 standards, ensuring your home has the maximum wind resistance and structural longevity required for the Bristol climate.
TD Roofing Contractors are your local roofing contractors in Bristol, providing 20+ years of expert service. From emergency roof repairs to new slate installations, we cover all BS postcodes with quality and integrity.
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