Putney roof insulation

The first stage of this project was replacing the insulation in the sloping roof of the dormer and adding storage to the eaves. The loft conversion has been done reasonably well and the flat roof area and rear wall properly insulated. 

#putneyretrofit
Original insulation showing the gaps and missing sections

However the existing sloping roof was not so successful. Polystyrene insulation had been installed between most of the joists, but not all, not sure why but they had missed some areas leaving big gaps in the insulation envelope.

#putneyretrofit
Starting to insert insulation between the rafters. Still some gaps to fill.

We replaced the 50mm of polystyrene with 50mm of KIngspan between the joists to create an airtightness barrier we filled all the gaps with Isocynate free expanding foam and then taped

them with aluminium tape. Then we added a further 50mm of insulated plasterboard below the joists.

Many loft conversions leave the eaves storage area uninsulated and the doors can prove a weak

#putneyretrofit
100mm of rockwool going between the rafters in the eaves storage area.

point with the wind whistling through them. We had already added rockwool to the floor area and we took the wall/roof insulation down to meet this and insulated the end walls as well creating a ‘warm’ storage area.

Putney retrofit project

 

#putneyretrofit
No garden to put the sign in

I am currently refurbishing this gorgeous two bedroom flat in Putney. The client is very keen to improve the performance of the house and I am working on the structure to ensure it will be warm, airtight and condensation free for the future. A Parity Home Energy Masterplan has also been carried out for the property and we are using this to inform the refurbishment.

#putneyretrofit
Important welfare facilities in place. Might need a spoon

 

 

The flat is spread over two floors with two roof terraces and the top floor is a loft conversion, this means there are lots of different types of construction and different opportunities to add different insulation types suitable for that construction.

 

We are also working very hard to minimise the VOC level in the flat and using appropriate

#putneyretrofit
Special low emission expanding foam

materials to combat this. I have been been checking all the materials before they come on site and consulting with the client to ensure she is happy. We have had to compromise in some areas, for instance the ceiling height is restricted in the loft conversion so we are using PIR insulation to keep as much space as possible, we have managed to source Isocynate free expanding foam to fill the gaps though so won’t be adding anymore chemicals to the air in the installation.

 

I will be adding updates and photos as this fascinating project progresses. I will mark them all #putneyretrofit

Extension in Kennington with green roof

I went to visit an extension in Kennington which has the biggest domestic green roof I have built. There are some very big skylights so it isn’t all green but it looks great. This first picture shows the rear extension with some rather fine timber cladding, you can see the plants poking over the top of the coping stones:

IMG_20160718_143650.jpg

The combination of rain and sunshine we have seen this summer has been really good for the plants, even if people haven’t been so happy. I missed the peak flowering of this roof but there were still plenty in bloom on Monday. The clients daughter has a bedroom window looking out onto the roof and has been enjoying the developing scene.

IMG_20160718_143829.jpg

The skylights really bring light into the house and the kitchen looks even bigger than the space the extension added on. You can see some of the plants waving in the breeze around the sides when you are having dinner.

IMG_20160718_143606.jpg IMG_20160718_144054.jpg

Reclaimed materials in side return extension in Hackney

A side return infill extension with an industrial style. Extensive use of reclaimed materials, high standards of insulation and a wildflower green roof.

We completed this project late on last year working with Clements Design as the architects.

The project aimed to turn a cramped kitchen into a spacious area for cooking, eating and socialising. There is an industrial and sustainability theme to the project, the materials used are often from or designed for factories. Electrics are contained in galvanised metal conduit and the floor is concrete. Walls are exposed brick, both reclaimed glazed brick and the existing London stock bricks revealed to the world. The large glass panels to the roof draw in light to what was once a dark area and bring out the rich colours in the reclaimed wood cladding.

Though the materials could be seen as austere they are softened by the contents of the room that reflect family life, there is space for a large wooden toy stove, a comfy sofa and a gorgeous oak dining table with mismatched chairs.

The large rear doors mean the garden can be seen and accessed easily from the house, the doors can be flung open in the summer for barbecues. The green roof will develop over time but already has wildflowers peeking over the parapet and they can be seen swaying through the glass roof.

The project was also designed in conjunction with the neighbours and they share the party wall and the box gutter.

Sustainability was a key part of the client’s aim for the project. Reclaimed materials were used wherever possible. All the bricks removed in the demolition stage were cleaned and re-used onsite to build the new structure. Internally there are two walls of glazed bricks reclaimed from a lift shaft in Kensington. The other walls are the original brick exposed and insulated on the outside where appropriate. The bi-fold doors are triple glazed with a u-value of 1.09 are factory finished for long life and are made from environmentally sourced timber from sustainable forests. The heating is underfloor and utilises the existing condensing boiler, three Nest controls were added to the system to control this and create two new heating zones in the house.

The wood (for drawer fronts, shelves and cladding) is from a reclaimed wood specialist in Guiseley, Leeds, called Machells and is cut down from Yorkshire Victorian mill joists.

The large pendant lamps are reclaimed from a 1950’s factory in the Stoke area.

The table was made in Leeds from British oak 35 years ago.

All the shelf brackets and drawer handles were made in England in foundries using all traditional methods.

All lighting is LED, even filament style traditional bulbs are actually LED.

The green roof is part plug planted and part seeded with a mixture of wildflowers, meadow plants and some sedums. The roof will flower through most of the year and provide habitat for insects and foraging for birds amongst other biodiversity benefits.

Nine months in and this green roof has been thriving

I went to see the roof I built in Kennington last month and took some photos I thought I would share. I wrote about this one last year showing the build up process to a green roof. I was particularly pleased that the insulation we put on as an added extra has made a real difference to the householders, the side return was previously a no-go area in the cold winter months but has now become habitable with the added warmth.

Anyway here are a few photos to illustrate how well the roof has been growing over the last nine months:

The flowers are growing well including the grape hyacinth
The flowers are growing well
A really good selection of wildflowers has sprung up
A really good selection of wildflowers has sprung up
Maybe I should have made the middle access a little narrower
Maybe I should have made the middle access a little narrower

Overall I am delighted with the roof and the clients are really pleased too. The roof has already developed really well and should develop further over the next few years. The roof should reach maturity after three years but different plants will dominate in different years and seasons.

If you want your own green roof give me a ring on 020 8133 0190 or drop me an email alex@ecoalex.com

 

 

Reclaimed bricks and cladding looking great

We have nearly finished the extension we have been working on for the last few months in Hackney. The walls, roof and floor are all in place and there is just fit out for the inside and the green roof to go on top.

The glass roof had to be lifted into place by hand
The glass roof had to be lifted into place by hand
The yellow London stocks were reclaimed on site. The doors have a u value of 1.09 including the frame
The yellow London stocks were reclaimed on site. The doors have a u value of 1.09 including the frame
All the wiring is in galvanised steel conduit. The exposed bricks will be protected by external wall insulation on the outside.
All the wiring is in galvanised steel conduit. The exposed bricks will be protected by external wall insulation on the outside.
The glass, reclaimed cladding, exposed steel and reclaimed bricks really work well together.
The glass, reclaimed cladding, exposed steel and reclaimed bricks really work well together.
A lightweight industrial screed is making up the floor
A lightweight industrial screed is making up the floor

Green roof in South London

Last week I completed another green roof in Streatham. It is on the rear of a really interesting house, a 1930s semi that is getting a complete eco-makeover from the owner. He has insulated the walls inside and out with wood fibre and remade the roof in solar panels and that is just the start. All Stephen’s neighbours find it hard to believe how warm the house is without loads of heating!

Anyway, last Wednesday he set aside so I could come along and help him build a green roof, here are the photos:

The roof is on top of this single storey extension
The roof is on top of this single storey extension
The first layer of the green roof, a fleece to protect the waterproofing and retain some of the water.
The first layer of the green roof, a fleece to protect the waterproofing and retain some of the water.
Then we added a drainage layer to encourage free draining.
Then we added a drainage layer to encourage free draining.
Next is the root barrier and then special substrate
Next is the root barrier and then special substrate
We planted the roof with sedums, widlflower plugs and sowed a selection of wildflower seeds
We planted the roof with sedums, widlflower plugs and sowed a selection of wildflower seeds
The finished article
The finished article
It should grow and develop over the next few years until it reaches maturity.
It should grow and develop over the next few years until it reaches maturity.

New green extension in Hackney

Just a quick update, we broke ground on a new extension last week. It’s mostly just digging at the moment but still exciting. I got to put up a sign outside the house:

Ecoalex, new project

The project will develop over the next few weeks. The walls incorporate high levels of insulation and will be made using reclaimed materials including a white glazed brick interior and re-used wood cladding.

I spent some time in @thewashcoffee going through the plans from Clements Design with Shaun the project manager on Wednesday, checking the build process and making sure we will avoid thermal bridges. The design looks sound and we are starting on the steel supports over the next few days.

The guys all look smart in the new Ecoalex hi vis vests and are looking for opportunities to save materials on site and re-use as much as they can in the build.

Hi Vis

Biodiverse green roof in London

Last week I completed a ‘green’ green roof. Not only was it a green roof with plants increasing the amount of green space in central London but we also managed to use it to improve the energy efficiency of the house we were building it on.

The customers were really interested in using a small roof area they had to create a wild area of land to increase bio diversity. They are not far from Roots & shoots the environmental education centre and wanted to recreate some of the wildlife areas there. We planned out the roof to include different heights of soil, a wide range of native plants and areas of logs and brick dust to create habitats for invertebrates.

A week or two before the build I was on a CORE retrofit course learning about different types of roof insulation. This included a method where the insulation was placed above the roof’s waterproofing. This was perfect for this job as the roof already had excellent waterproofing and the plan was to lay the green roof on top of this. A quick call to the customer to ask them and they confirmed that the rooms below were cold so we added this to the project.

The project was planned over two days:

On day one we moved all the materials through the house, erected the scaffold tower and began laying the insulation:

There was quite a lot to move but it all went pretty smoothly.

green roof biodiversity
Green roof substrate

Day two started with us collecting some wood from the previous nights storm to create a log pile for invertebrates on the way to the site, oh and a full English for the guys helping with the work.

Installation of fleece and drainage layer
Installation of fleece and drainage layer

We made short work of installing the water retention

 

Continue reading Biodiverse green roof in London

Sustainable living for a sustainable planet