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


Under floor-vent extensions

One of the issues I have to sort out before pouring the slab is extending two under floor vents from the wall of the house, under the slab floor of the extension, and venting on the outside wall of the extension. One of these is shown below.

Clearly however this is achieved, it needs to go under the slab. If there is a problem, there is always a solution and products are available from the company below.

Timloc underfloor venting products
This picture shows the telescopic underfloor ventilator that connects to the timloc air brick.

It sits between the inner and the outer wall and moves the vent to below the slab level.

There are other accessories and one I need is 1205 which enables the connection of the vent to a standard 100mm drain pipe that goes under the slab.

Another telescopic underfloor ventilator is then used to take the vent above the slab on the external wall and connect to the airbrick.

Clever stuff!


These are the parts I bought.
This is how they look assembled!
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