I need some advice as to the brick requirements at the various levels of a dwarf wall for a conservatory. Basically what I would like to know is, do the first courses below ground level have to be engineering bricks? or can I use the facing bricks that I am using for the rest of the wall which are F2 rated. As I understand it the bricks above ground level up to DPC have to be F2 rated, is this correct? My final question, on the internal leaf of the wall, if I use blockwork is there any special requirements below ground level. Thanks in advance.
Brick grade requirement for dwarf wall build
- Thread starter Spatvxr
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No they don't have to be engineering bricks as long as they are frost resistant. If they are in the ground they are likely to remain saturated for long periods of time so it's also prudent to ensure that they are S2 rated.
most concrete and AAC blocks can be used below ground level, but check the manufacturers specifications to be sure.
Also make sure you use a strong (minimum 1:4) mortar.
most concrete and AAC blocks can be used below ground level, but check the manufacturers specifications to be sure.
Also make sure you use a strong (minimum 1:4) mortar.
Last edited:
Thankyou, that has cleared that up for me.
Modern terminology is knee wall.
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I've just googled (searched for and found) some Birmingham based reports from D&T surveys and RICS surveys, and both use the term knee wall with respect to sub-floors and attics.
Little people, & others, find the term dwarf to be rude, annoying, insensitive & actually vindictive once one knows better.
Little people, & others, find the term dwarf to be rude, annoying, insensitive & actually vindictive once one knows better.
I'm taking my grandson to see Snow White and the 7 Knees in Bristol before Christmas woody, you need to keep up with the times.
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