Estimates, Quotations & Take Offs

Availability Of Roofing Materials

At About Roofing Supplies, we stock and supply a vast range of roofing materials with thousands of products being available to order directly from all the leading manufacturers such as Sandtoft, Redland, Marley, Klober, Manthorpe, Tyvek, Cromar, Oxyturbo, Cure It, Tudor Roof Tiles, Keymer, Chesterfelt. We also stock & supply lead roll for flashings, Velux windows and upvc fascias and soffit.

Collection of roofing materials from our branches, and telephone orders are always welcome - however at early stages in a project, the quantity of materials that are required may not be apparent, and this is where our estimation and take off service is be the solution!.

Quotations For Roofing and Building Materials

We welcome the opportunity to provide quotations for roofing and building projects. Many customers call or email lists of their requirements, and we can then provide a priced quotation, with VAT clearly displayed, and costs such as delivery charges listed as a separate element giving our customers complete control over the pricing for their projects.

Estimates From Plans

Unlike our competitors, not only can we carry out estimates - commonly known as 'take offs' - from drawings but we have also invested in a special printer to enable us to print drawings off at full size, enabling us to accurately estimate the materials need for each project.

We welcome the submission of plans and drawings for take offs - where possible we would prefer not to estimate from .pdf drawings as the compression process to reduce a full size drawing to a .pdf document results in inaccuracies in the measurements, which in turn has a negative effect on the accuracy of the estimates that we are able to carry out.

Accuracy Of Estimates

When estimates are carried out, the following points are worth being aware of:

Whilst we try to ensure that the estimates that we provide are as accurate as possible, we cannot be held responsible for any extra costs incurred as a result of discrepancies in quantities.

For examples, many of the drawings that we estimate materials from are 1:100 or 1:50 scale. This often means that we cannot be completely accurate with the quantity of tile or slate courses on any given slope. Even just one tile course out around the perimeter of any building can result in a significant difference in the final tile, bonnet and valley count. We also allow one gable tile per course, per elevation, because we cannot know with any degree of certainty exactly how the tiles will lay along the length of the batten and consequently whether or not a gable tile will be necessary or not. This is particularly apparent when valley and bonnet hip tiles are used. The gable count that we give is the maximum we consider will be used on a contract but the actual requirement may be much less. This obviously has a bearing on the final tile quantity.

Similarly we allow a percentage of materials for waste when estimating interlocking tiles for cuts into valleys and hips, however accuracy is difficult, and any quantities quoted should be treated as an indication only. As a result, we strongly recommend that a final measure be taken on site once the carpentry work is complete.

Due to the inaccuracies inherent in scaling off dimensions from architectural drawings, quotations should only be used as a guide to the final quantities required for each project, as some assumptions may have been made in our calculations.

In the current environment, many products are subject to price fluctuations, because of the Exchange Rate for example, so quotations are valid for 30 days from the document date. If the commencement date of your project will fall outside this time frame, please make us aware of this as we may be able to extend the validity of the quotation on a case by case basis.