"...leaky thatch roofs..."
Quality thatch roofs do not leak. Today one is likely to find better thatch work in Natal/Zululand than in Central America but even in Europe there are some who keep the almost-lost art alive.
So you think the Mohammedans just turned around at Tours of their own accord...a unique theory...completely faggy and perverted but different.
Part of the problem may be that the number of participants was exaggerated on both sides, with the Franks claiming Rahman had 80,000 cavalry, and that they, themselves only lost 1,500 infantry (out of a mere 15,000 men at arms in the entirity of the Frankish domains).
Although the Moslem army was far from being a small raiding party, it's most likely both armies suffered such heavy losses that no further combat was possible the remainder of the year (since October in Europe does mark the beginning of Fall.)
By the time Spring came, most of the Moslem converts had left France, or been robbed and slaughtered by Pagan soldiers in Martel's command.
Since Rahmen had been killed, disputes over succession, ownership of lands, use of castles, and so forth would probably consume Moslem interests in Spain for most of the next decade.
With no reason to go back to France (besides the place being exceptionally nasty in that period), the Moslems simply did not return.