I do this shiz for a living I will help you 👍😁❤️
Building and Carpentry Services based in Marlow servicing surrounding areas including Maidenhead and High Wycombe. Our commercial services include home improvements, extensions, attic conversions, bespoke garden buildings, kitchen installations and property maintenance.
www.marlowbuildingcarpentry.com
Recent home I built.
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65 bricks to a Sqm Try to get a brick less than £1 each
If your only doing the garage door area
Look for reclaimed bricks …
Also you can get reclaimed windows as you can build your wall around the window size …..
So source a good surplus te requirement window ( could be a brand new window but the owners miss measured ) .
Then source reclaimed bricks .
Same with the insulation .
You can build the walls ( internal + external up on concrete lintels ..
Therefore exculpating the need to dig a complete foundation from side to side .
We call this a concrete pad and a pier with lintels .
Saves time / money / sweat /tears / usually some blood 🩸/ and the removal of spoil! Which also requires normally to go into a skip more money!
If you think you can find your damp course to the house …. You match it !
Set up a string line from your house damp course across front of your garage door area to build wall..
Then work all you measuremts fom that line.
Foundation pad of concret normally 1m dig down from the damp course line .. with 600 mm of concrete for the pad .. pad norammaly in this case
600mm wide ( this is the cavity wall direction ., and 600 long .+ 600 deep .
WATCH OUT ⚠️. GAS /‼️ELECTRICITY⚠️. Not only do I normally find gas & electricity in the garage door area just under the ground .. it often has your neighbours too ! ….. so. Super extra precaution needs to be taken here !
This requires the CAT scan tool from the hire shop . You need to use this tool to detect for services of gas and electricity in the ground where you are doing any digging .. and then because gas is in a plastic pipe you cannot assume your ok anywhere ..!‼️⚠️…
So this means you need to dig it by hand only and slowly .. even if you know where your gas and electricity comes into your home . You don’t know if they sneaked the house next doors in to you same Chanel in the ground … And yes they always do share the trenches they dig ..
If hard solid concret to get through first .. you need to be so careful of using a kango concrete breaking drill
Your services could be just underneath !
One trench can have all the services in it ! For two house .. maybe even three !
If your ok with everything I have just informed you of ,
And your prepared to roll up your sleeves and with a friend or two !
Sometimes having a friend help you is also because if you get into difficultly & require help
They can ring 999.
Like being electrocuted .
I will guide you further on your adventure if you want to proceed.