Following each individual brick should be a layer of adobe mortar, recommended to be at least  thick to make certain there is ample strength between the brick's edges and also to provide a relative moisture barrier during rain.
fˈɑːloʊɪŋ ˈiːtʃ ˌɪndᵻvˈɪdʒuːəl bɹˈɪk ʃˌʊd biː ɐ lˈeɪɚɹ ʌv ɐdˈoʊbi mˈɔːɹɾɚ, ɹˌɛkəmˈɛndᵻd təbi æt lˈiːst θˈɪk tə mˌeɪk sˈɜːʔn̩ ðɛɹ ɪz ˈæmpəl stɹˈɛŋθ bᵻtwˌiːn ðə bɹˈɪks ˈɛdʒᵻz ænd ˈɔːlsoʊ tə pɹəvˈaɪd ɐ ɹˈɛlətˌɪv mˈɔɪstʃɚ bˈæɹiɚ dˈʊɹɹɪŋ ɹˈeɪn.