Roof Insulation Upgrades Fitted During a Birmingham Recovering
Stripping a roof covering is the only moment when insulation can be added at rafter level without losing headroom or opening ceilings, which makes a recovering the cheapest thermal upgrade a house will ever get. Book a free on-site survey of roof insulation and the written report is yours whether the work follows or not.
- On site in 45 to 90 minutesEvery elevation photographed from ground level and ladder, and the roof void inspected from inside.
- A written report in two daysDefects separated into immediate, this season and monitor, with photographs against each.
- An itemised written scopeAgreed and signed before anyone starts, with no variation without a new figure.
Call the crew07446 375079
Monday to Friday, eight until six, and Saturday mornings. Emergency make-safe runs outside those hours.
Crews work across 8 Birmingham and Solihull districts: Sutton Coldfield, Harborne, Edgbaston, Moseley, Solihull, Erdington, Kings Heath and Selly Oak. Postcodes outside that run are quoted case by case rather than turned away.
- Free survey No charge for the survey, and none if the report says nothing needs doing.
- Own crews The people who survey the roof are the people who lay it. No subcontracting, no lead resale.
- Written scope first Quoted as an itemised scope agreed before work starts.
- Workmanship warranty Issued in writing on completion. Sole trader, no scheme registration.
Fitted while the covering is off, from above, with no internal disruption. Where it sits decides what it costs you in height.
- Over-rafter Rigid board laid over the rafters beneath the battens. Raises the roof line, which matters at a verge, an abutment or a party wall.
- Between-rafter Board cut between the rafters, retaining the existing roof line. Reduces depth in a converted space, so headroom is the constraint.
- Ceiling level Quilt at joist level. Suitable only where the void stays unheated.
Recovering more than half the roof area triggers a thermal element upgrade obligation, so the decision is often made for you.
What we fix
Why insulate while the roof is off?
Stripping the covering exposes the rafters from above, which is the only access route that avoids opening ceilings from inside. Insulation fitted at that moment costs a fraction of the same work carried out separately.
Fitted while the covering is off, from above, with no internal disruption. The method is rigid board laid over the rafters beneath the battens, raising the roof line slightly. Between-rafter insulation involves board cut between rafters, retaining the existing roof line.
How it works
Raising the roof line moves other things too.
- Stripping the covering creates the only access for rafter-level insulation from above.
- Recovering over half the roof area triggers the thermal element duty.
- A between-rafter board without an air path causes condensation.
- An over-rafter board raises the roof line which affects verges and abutments.
Straight answers
Over the rafters or between them?
Over-rafter board sits above the rafters beneath the battens and preserves internal height, but raises the roof line. Between-rafter board keeps the line unchanged and reduces depth inside. Habitable lofts usually justify over-rafter.
Ceiling-level insulation involves quilt at joist level, suitable only where the void stays unheated. Recovering more than half the roof area triggers an upgrade obligation.
Is insulation required by law when re-roofing?
Yes, where more than half the roof area is recovered. That triggers the thermal element duty, which requires the renovated element to meet a stated standard. The duty applies to the covering being renewed, not to the whole house.
Ventilation involves insulating between rafters without maintaining an air path causes condensation. Over-rafter board raises the covering, affecting verges, abutments and rainwater goods. The material and labour premium during a recovering is a fraction of the standalone cost.
Will it reduce the height of a loft room?
Between-rafter insulation reduces height by the board depth plus its air path. Over-rafter insulation reduces nothing internally because the entire thickness sits above the structure, raising the external roof line instead.
Ceiling-level quilt is retained or upgraded depending on how the void is used.
- Habitable void distinction: a used loft needs insulation at rafter level; an unused one does not
What happens to ventilation?
Insulating between rafters without maintaining a continuous air path above the board traps moisture in the void. The air path is designed alongside the insulation, and high-level ventilation is added where the eaves inlet cannot be restored.
What changes when the covering sits higher
Rafter-level insulation from above is only possible while the covering is off; afterwards it means opening ceilings. The method that costs slightly more preserves room height in a converted loft, which is the variable homeowners actually care about.
Book a survey
Adding board without maintaining the air path converts a thermal improvement into a damp problem. Over-rafter board lifts the covering, so verges, abutments and gutter positions all move — costs that belong in the quote.
Over-rafter insulation, and 5 more
- over-rafter insulation
- between-rafter insulation
- thermal element
- cold bridge
- air path
- roof line
On a cold deck the insulation sits at ceiling level and the void above it has to be ventilated. On a warm deck the insulation sits above the deck, over a vapour control layer, and there is no void to ventilate. The cold deck fails more often because its ventilation path is easy to block and impossible to inspect once the ceiling is up, which is why a warm deck is specified on a domestic flat roof being renewed.
Recent work
Job photographs are added as each contract completes, with the date, the district and the defect named in the caption.
Where we work
8 Birmingham and Solihull districts
- Sutton Coldfield
- Harborne
- Edgbaston
- Moseley
- Solihull
- Erdington
- Kings Heath
- Selly Oak
Postcodes outside that run are quoted case by case rather than turned away.
Related pages
Book a roof insulation survey
A survey takes forty-five to ninety minutes and the written report follows within two working days. Nothing is charged for the survey, and nothing is charged if the report says nothing needs doing.