On 2 September it will be withdrawing its 60 per cent loan to value (LTV) and 70 per cent LTV residential products.
The 60 per cent deals will be replaced on 3 September with an increased LTV of 65 per cent.
However, the 70 per cent LTV products will not be replaced.
In a message to brokers, Foundation said any decisions in principal (DIPs) on existing products will need to be received by 7pm on 2 September.
Brokers will then have 30 days from the DIP accept date to progress to the case to a full application.
Further details of the incoming products will be published later this week.