Tower™ Shake and Tower™ Slate Frequently Asked Questions

Click a question to view the answer below.

  1. What are Tower™ Shake and Tower™ Slate shingles made from?
  2. What is the appearance advantage of Tower™ Shake and Tower™ Slate?
  3. How have you determined how well Tower™ Shake and Tower™ Slate will weather?
  4. How will Tower™ Shake and Tower™ Slate shingles perform in low temperatures?
  5. Will Tower™ Shake and Tower™ Slate shingles be able to withstand freeze/thaw cycling?
  6. Will I be able to transfer the warranty of Tower™ Shake and Tower™ Slate shingles if I decide to sell my home?
  7. Are Tower™ Shake and Tower™ Slate maintenance free?
  8. Do I need to have a registered installer put Tower™ Shake and Tower™ Slate on my roof?
  9. Do I void the warranty if I do not follow all the ‘recommended’ installation procedures?
  10. Why would CGT have installation recommendations if the recommendations do not affect the warranty?
  11. Are there any other colours that we can choose from besides those shown?
  12. How do I get Tower™ Shake and Tower™ Slate?
  13. Why would I require underlayments with Tower™ Shake and Tower™ Slate shingles?
  14. Can I mix colours?
  15. What can I do if my roof ‘looks’ dirty and the rain isn’t washing it off?
  16. Are Tower™ Shake and Tower™ Slate fire resistant?
  17. Are Tower™ Shake and Tower™ Slate resistant to impact of falling tree limbs?
  18. In the event that damage occurs to Tower™ Shake and Towe™ Slate (eg. animals trying to get into an attic), can repairs be easily done?
  19. The roofer just installed the capping and the corners are ‘sticking up’. Do I need to get the roofer to nail these corners down?
  20. Why does the roof have to be vented as described in the application procedures?
  21. Why is it not recommended that the existing roof be left in place with Tower™ Shake and Tower™ Slate?
  22. 50 years is a long time. Does this make the warranty for Tower™ Shake and Tower™ Slate shingles about as valuable as the paper it is written on?



1. What are Tower™ Shake and Tower™ Slate shingles made from?
Tower™ Shake and Tower™ Slate shingles are made from a blend of premium polymers, fire inhibitors, UV stabilizers, heat stabilizers and recycled materials.

2. What is the appearance advantage of Tower™ Shake and Tower™ Slate?
Tower™ Shake and Tower™ Slate are molded from actual slate and shake materials and therefore have a definitive authentic appearance.

3. How have you determined how well Tower™ Shake and Tower™ Slate will weather?
Tower™ Shake and Tower™ Slate have been tested according to the CCMC protocol for composite materials. A minimum requirement weathers the material s for 2000 hours. Tower™ Shake and Tower™ Slate have been tested to 5000 hours and continue to exceed the requirements for 2000 hours weathering.

4. How will Tower™ Shake and Tower™ Slate shingles perform in low temperatures?
Tower™ Shake and Tower™ Slate shingles have been tested for impact resistance at low temperatures as low as -40oC.

5. Will Tower™ Shake and Tower™ Slate shingles be able to withstand freeze/thaw cycling?
Yes. Tower™ Shake and Tower™ Slate shingles are resistant to water absorption. Nominal water absorption ensures that Tower™ Shake and Tower™ Slate shingles perform in freeze/thaw cycling.

6. Will I be able to transfer the warranty of Tower™ Shake and Towe™ Slate shingles if I decide to sell my home?
Yes, the warranty for Tower™ Shake and Tower™ Slate shingles can be transferred to the new owner of the home. Tower™ Shake and Tower™ Slate will increase the value of your home as all buyers tend to ‘adjust’ the offered price based on when they believe they will have to replace the roof. Removing the ‘adjustment’ factor ensures that you get maximum value for your investment into your home.

7. Are Tower™ Shake and Tower™ Slate maintenance free?
Yes, the shingles themselves are maintenance free, but all roofs require some maintenance. If you have trees on the property, it would require the leaves that end up on the roof to be removed from valleys and eave troughs. Leaving them there would increase the likelihood of ice dams forming. A leak caused in this manner would not be a result of a manufacturer’s defect of the product and hence, would not be covered under warranty.

8. Do I need to have a registered installer put Tower™ Shake and Tower™ Slate on my roof?
No. Tower™ Shake and Tower™ Slate are installed in a similar fashion to typical steep slope roofing materials and can be installed by those that have an understanding of roofing applications.

9. Do I void the warranty if I do not follow all the ‘recommended’ installation procedures?
The warranty on Tower™Shake and Tower™ Slate is against manufacturer’s defects of the product. The recommended application instructions do not have an effect on the material itself, but are best roofing practices. Best roofing practices are put into place to protect the home owner and ensure that the home owner is satisfied with the end result of product application immediately after application as well as in the future.

10. Why would CGT have installation recommendations if the recommendations do not affect the warranty?
CGT recognizes that you are purchasing a high quality product, but your satisfaction in the product will not be complete if you have a leak (even though it is not a fault of the product) or if the shingles don’t appear to lie flat (due to the deck ‘sinking’ between the roof joists). The product and the recommendations are in place to not only ensure you have the best roof system possible, but also to eliminate as many factors that may adversely affect the final installation outcome as possible.

11. Are there any other colours that we can choose from besides those shown?
Yes. CGT can formulate custom colours. The process is relatively simple:
• send us the colour you want us to match to
• sign off on the colour swatch we send back to you
• enjoy your custom colour roof

12. How do I get Tower™ Shake and Tower™ Slate?
Please contact us at (519) 623-1630 x3331 and provide the address of your home or project.

13.Why would I require underlayments with Tower™ Shake and Tower™ Slate shingles?
The decking, or other parts of the roof structure exposed to moisture, make it possible that this would adversely affect their lifespan. There are many avenues for moisture to get to these sections be it by wind driven rain at the rakes, through ice damming, or leaking around a protrusion. By adding extra protection through underlayments, you are making sure that your investment (your home) is protected.

14. Can I mix colours?
Yes. You may mix colours if you wish. Mixing slate colours may add visual appeal and a realistic component to your roof as natural slate may often consist of varying colours. If this is desired, simply let the supplier know how much of each colour you are looking for (please keep in mind that the product is sold in boxes and not by ‘the piece’) and then let your roofer know (if you are not doing it yourself) how you would like the colours blended on the roof.

15. What can I do if my roof ‘looks’ dirty and the rain isn’t washing it off?
A soft brush with a mild detergent in water may be used to wash your roof. Ensure to rinse it off after lightly scrubbing the roof to help avoid ‘soap’ marks.

16. Are Tower™ Shake and Tower™ Slate fire resistant?
The blend of Tower™ Shake and Tower™ Slate shingles does not support combustion.

17. Are Tower™ Shake and Tower™ Slate resistant to impact of falling tree limbs?
Tower™ Shake and Tower™ Slate are resistant to the impact of falling tree limbs.

18. In the event that damage occurs to Tower™ Shake and Tower™ Slate (eg. animals trying to get into an attic), can repairs be easily done?
Tower™ Shake and Tower™ Slate are pliable so that corners can be warmed with a hot air welder (if cool outside) and bent up so that fasteners can be removed. This allows you to work in an isolated area.

19. The roofer just installed the capping and the corners are ‘sticking up’. Do I need to get the roofer to nail these corners down?
No. Face nailing the product is not necessary or recommended. Tower™ Shake and Tower™ Slate shingles are easily formed to suit with a hot air welder.

20. Why does the roof have to be vented as described in the application procedures?
Venting is not only important for Tower™ Shake and Tower™ Slate, it is important for all roofing products, but most importantly your home, as this effects the trusses and the deck more than it effects the roofing. If the attic space is not vented, the hot, moist air may start the wood materials to mould or rot. Excessive heat in the attic will also make it harder to keep your home cool in the summer, or heated in the winter.

21. Why is it not recommended that the existing roof be left in place with Tower™ Shake and Tower™ Slate?
Leaving the existing roof in place may be touted as a cost saving measure, however, in the case of asphalt roofing, this practice decreases the lifespan of the shingles being placed over top of them. Leaving the old roof in place also increases the weight of the roof and without an engineering report, this may not be a safe option. Leaving the old roof in place also hides any trouble areas that should not be ignored, especially with long lasting roofing materials, as this can lead to very costly repairs if it is determined (after the roof has been installed) that the deck or other structural components are compromised.

22. 50 years is a long time. Does this make the warranty for Tower™ Shake and Tower™ Slate shingles about as valuable as the paper it is written on?
The company’s lineage dates back to 1863. Although the company may have changed names a few times since its beginning, it has been a stable employer since that time. It has been established in Cambridge as CGT since the 1940’s. There have been a number of evolving products that have been produced from wagon wheels to rain coats to composite shingles. This type of diversity ensures that the company remains viable and ensures that the warranties for Tower™ Shake and Tower™ Slate shingles are worth much more than the paper they are written on.

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Tower™ Roofing is a registered trademark of CGT Limited. Please see product samples for colour. Colours as displayed on this website may not match actual shingle colours. All content on this site is copyright © CGT Limited 2011