# Roof-Mounted Heat Pump, Islington N1 | Case Study

> No room in the garden, so the 7kW Vaillant heat pump went on the flat roof in Islington N1, on rubber blocks over a mat so the roof takes no point load.

*Climate Shield London — https://climateshieldlondon.co.uk/projects/roof-mounted-heat-pump-islington-n1/. Verbatim from the page; this is the same content, not a summary.*

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![The aroTHERM plus on the flat roof, on rubber blocks over a protective mat.](https://climateshieldlondon.co.uk/assets/img/case/islington-n1-roof-01-960.webp)

# No room in the garden, so the heat pump went on the roof

An Islington N1 home with no garden space to spare. The 7kW Vaillant aroTHERM plus went up onto the flat roof instead, with the £7,500 grant taken off the price.

[Price my heat pump](https://climateshieldlondon.co.uk/heat-pump-cost-london/#calc-hp) [WhatsApp us](https://wa.me/447875564437?text=Hi%20Climate%20Shield%2C%20I%20have%20seen%20your%20Islington%20N1%20job%20and%20would%20like%20a%20survey.)

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We installed a 7kW Vaillant aroTHERM plus air source heat pump on the flat roof of a home in Islington N1, because the garden had no space for it. It now provides the house's heating and hot water, with the £7,500 grant taken off the price.

Inner London gardens are often too small for a heat pump. A flat roof is frequently the better place, provided the roof is protected and the unit can be reached for servicing.

## The job at a glance

Where

Islington N1, London Borough of Islington

Heat pump

Vaillant aroTHERM plus 7kW

Position

Flat roof, on rubber blocks over a protective mat

Grant

£7,500 Boiler Upgrade Scheme

## How the job was done

Step by step, in the photographs taken on site.

1. ![The aroTHERM plus on the flat roof, on rubber blocks over a protective mat.](https://climateshieldlondon.co.uk/assets/img/case/islington-n1-roof-01-960.webp)   1 Why the roof The garden was too small to give a unit the clear space it needs round it without taking over the garden. The flat roof had the space and the free air a heat pump wants.
2. ![The unit from the front, with clear air all round it on the roof.](https://climateshieldlondon.co.uk/assets/img/case/islington-n1-roof-02-960.webp)   2 No point load on the roof The unit stands on rubber blocks over a protective mat, so its weight is spread and the roof covering is never pressed by a sharp foot. Nothing is fixed through the roof.
3. 3 Reachable for servicing A heat pump is serviced every year, so the position has to be one an engineer can get to safely. That was checked at the survey before the roof was chosen.

## Thinking about a heat pump?

What this job involved, applied to your own house.

[Air source heat pumpsWhole-house heating with the £7,500 grantAir source heat pumps](https://climateshieldlondon.co.uk/air-source-heat-pumps-london/) [What a heat pump costsTen real quotations, before and after the grantWhat a heat pump costs](https://climateshieldlondon.co.uk/heat-pump-cost-london/) [Heat pump or air conditioning?Which one a house actually needsHeat pump or air conditioning?](https://climateshieldlondon.co.uk/air-conditioning-vs-air-source-heat-pump/) [Air-to-air heat pumpsHeats and cools, room by roomAir-to-air heat pumps](https://climateshieldlondon.co.uk/air-to-air-heat-pump-london/)

## Islington N1: questions about this job

### Can a heat pump go on a flat roof?

Often, yes. The roof has to carry the weight, the covering has to be protected, and there has to be safe access for servicing. Permitted development also has conditions for roof-mounted units, which we check first.

### Is a heat pump allowed on a London terrace?

Usually, under permitted development, if the unit meets the conditions on size, position and noise. [The conditions, in a table](https://climateshieldlondon.co.uk/air-conditioning-planning-permission/).

## More of our finished work

Other jobs we have photographed. Tap one for the project.

[All 34 projects](https://climateshieldlondon.co.uk/projects/)

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## Book a free heat pump survey

We measure every room, calculate the heat loss, check the radiators and the space for a cylinder, and send a written price with the grant already taken off. No cost and no obligation.

Call 020 3393 1331 [WhatsApp us](https://wa.me/447875564437?text=Hi%20Climate%20Shield%2C%20I%20have%20seen%20your%20Islington%20N1%20job%20and%20would%20like%20a%20survey.)

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Page updated 24 September 2026