Our design consultants are also on hand to provide you with the most knowledgeable advice to help you make the best decision for your property. TradeMark insists on providing a non-pushy sales service so that you can view products such as our Bi-folding doors at your own leisure and without any unnecessary pressure. Please ask our consultants any questions that you may have as all advice provided by TradeMark is given FREE of charge and there is absolutely no obligation to buy.