Planning the build
Why build an extension?
Initial design sketches
On-line Building Regs
Meeting planners
 Meeting building control
 Planning the foundations
 Planning the floor slab
 Marking out the footings
 Damp proof course issues
 Possible drainage problems?

 Construction of the walls
 Proposed roof structure
Windows diary
 Window challenges
 Initial window plans
 Making the casements
 Making the frame
 Designing leaded lights
 Making leaded lights
 Assembling the window
 The little window

 The door frame
Demolition diary
 The demolition starts!
 The demolition continues
 Still more demolition

Foundations diary
 Foundation issues
 Drain issues
 Digging the foundations
 Rethinking foundations!
 Pouring the foundations

Floor slab diary
 Rethinking the slab!
 Floor vent extensions
 Preparing the slab #1
 Preparing the slab #2
 Pouring the slab

Walls diary
 Preparing to build walls
 Build up to the DPC
 Build the walls #1
 Build the walls #2
 The gas men cometh
 Build the walls #3
 Finishing the walls
Roof diary
 Roof structure build
 Tiling the roof
 Finishing the roof
 Finishing the gables
 Roof insulation

 Floor screed
 Shower room
 Shower room floors
 Shower room walls
 Utility room
 Utility room walls
 Utility room floor
 Finishing the windows

Project finished!
 Final inspection
 The certificate
 Final thoughts

 Twelve months on!
 Material costs
Sister sites
 House re-roof project
 Home gas usage data

 Stop paint flaking
 DIY secondary glazing


Construction of the walls

I've pondered fore some time thinking about how I should build and finish the wall of the extension. The main house is rendered and painted white, however, the garage on the front of the house is built almost is a 'crazy' but appealing pattern as you can see below. Indeed, I extended the garage in the same manner (where the sunlight is hitting the wall) a few years ago.


On reflection I have decided to copy the style of this wall on the extension at the rear of the house.

The 'crazy' wall built in 1932

A close up of the wall I plan to replicate

I plan to reclaim the bricks of the existing toilet when I knock it down and the nearest bricks I could find to match are the Ibstock Grosvenor Purple that can be seen on www.ibstock.com that are almost a perfect match to the facing bricks currently used on the house. You can also order brick samples from the web site! There is also a really useful  graphic brick calculator available as well.

The Ibstock Grosvenor Purple bricks

The example bricks as ordered on the Ibstock web site - a good match!

The walls of the extension will be built using the 65mm x 100mm x 215 mm Grosvenor Purple (plus bricks reclaimed from knocking the toilet down) and other bits and pieces!) and the inside wall from 100mm (2.5") thick heavyweight blocks separated by 90mm (2") gap that is filled with a total fill fibre insulation.

Wall connectors will be required to attach the extension walls to the existing building.

2.2 metre wall connectors C2KG from Simpsons


Source: UK Building Regulations, Planning Portal

Friday 13th April: After talking with Building Control surveyor, he wanted me to fill the cavity with insulation using a 90mm gap so the complete wall thickness will be 290mm.

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